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Roberts J, Dugdale-Duwell D, Lillis J, Pinto JM, Willmott A, Yeshurun S, Mor M, Souren T. The efficacy of a home-use metabolic device (Lumen) in response to a short-term low and high carbohydrate diet in healthy volunteers. J Int Soc Sports Nutr 2023; 20:2185537. [PMID: 36862060 PMCID: PMC9987730 DOI: 10.1080/15502783.2023.2185537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023] Open
Abstract
BACKGROUND Based on stoichiometric assumptions, and real-time assessment of expired carbon dioxide (%CO2) and flow rate, the Lumen device provides potential for consumers/athletes to monitor metabolic responses to dietary programs outside of laboratory conditions. However, there is a paucity of research exploring device efficacy. This study aimed to evaluate Lumen device response to: i) a high-carbohydrate meal under laboratory conditions, and ii) a short-term low- or high-carbohydrate diet in healthy volunteers. METHODS Following institutional ethical approval, 12 healthy volunteers (age: 36 ± 4 yrs; body mass: 72.1 ± 3.6 kg; height: 1.71 ± 0.02 m) performed Lumen breath and Douglas bag expired air measures under fasted laboratory conditions and at 30 and 60 min after a high-carbohydrate (2 g·kg-1) meal, along with capilliarized blood glucose assessment. Data were analyzed using a one-way ANOVA, with ordinary least squares regression used to assess the model between Lumen expired carbon dioxide percentage (L%CO2) and respiratory exchange ratio (RER). In a separate phase, 27 recreationally active adults (age: 42 ± 2 yrs; body mass: 71.9 ± 1.9 kg; height: 1.72 ± 0.02 m) completed a 7-day low- (~20% of energy intake [EI]; LOW) or high-carbohydrate diet (~60% of EI; HIGH) in a randomized, cross-over design under free-living conditions. L%CO2 and derived Lumen Index (LI) were recorded daily across morning (fasted and post-breakfast) and evening (pre/post meal, pre-bed) periods. Repeated measures ANOVA were employed for main analyses, with Bonferroni post-hoc assessment applied (P ≤ 0.05). RESULTS Following the carbohydrate test-meal, L%CO2 increased from 4.49 ± 0.05% to 4.80 ± 0.06% by 30 min, remaining elevated at 4.76 ± 0.06% by 60 min post-feeding (P < 0.001, ηp2 = 0.74). Similarly, RER increased by 18.1% from 0.77 ± 0.03 to 0.91 ± 0.02 by 30 min post-meal (P = 0.002). When considering peak data, regression analysis demonstrated a significant model effect between RER and L%CO2 (F = 5.62, P = 0.03, R2 = 0.20). Following main dietary interventions, no significant interactions (diet × day) were found. However, main diet effects were evident across all time-points assessed, highlighting significant differences for both L%CO2 and LI between LOW and HIGH conditions (P < 0.003). For L%CO2, this was particularly noted under fasted (4.35 ± 0.07 vs. 4.46 ± 0.06%, P = 0.001), pre-evening meal (4.35 ± 0.07 vs. 4.50 ± 0.06%, P < 0.001), and pre-bed time-points (4.51 ± 0.08 vs. 4.61 ± 0.06%, P = 0.005). CONCLUSION Our findings demonstrated that a portable, home-use metabolic device (Lumen) detected significantly increased expired %CO2 in response to a high-carbohydrate meal, and may be useful in tracking mean weekly changes to acute dietary carbohydrate modifications. Additional research is warranted to further determine the practical and clinical efficacy of the Lumen device in applied compared to laboratory settings.
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Affiliation(s)
- Justin Roberts
- Cambridge Centre for Sport and Exercise Sciences (CCSES), School of Psychology and Sport Science, Anglia Ruskin University, Cambridge, UK
| | - Dirk Dugdale-Duwell
- Occupational and Environmental Physiology Group, Centre for Sport Exercise and Life Sciences, Coventry University, Coventry, UK
| | - Joseph Lillis
- Cambridge Centre for Sport and Exercise Sciences (CCSES), School of Psychology and Sport Science, Anglia Ruskin University, Cambridge, UK
| | - Jorge Marques Pinto
- Cambridge Centre for Sport and Exercise Sciences (CCSES), School of Psychology and Sport Science, Anglia Ruskin University, Cambridge, UK
| | - Ash Willmott
- Cambridge Centre for Sport and Exercise Sciences (CCSES), School of Psychology and Sport Science, Anglia Ruskin University, Cambridge, UK
| | | | | | - Tjeu Souren
- Utrecht University Medical Center, Utrecht, The Netherlands.,School of Human Biology, Maastricht University, Maastricht, The Netherlands
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2
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Amiri-Ardekani E, Kazemi A, Sasani N, Fanfulla F, Clark CC. The association of meal glycemic index/load with quantitative and qualitative indicators of sleep: a systematic review. Minerva Med 2022; 113:1008-1016. [PMID: 33949181 DOI: 10.23736/s0026-4806.21.07444-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
INTRODUCTION We sought to systematically review the association between meal glycemic index or glycemic load and sleep indicators. EVIDENCE ACQUISITION PubMed, Scopus, Web of Science, and Embase were searched up to March 2021. Both observational and clinical trials studies, with both male and female participants of all ages, were included. EVIDENCE SYNTHESIS A total of 10 studies were included in this review; six with clinical trial and four with cross-sectional design. Among the six clinical trial, three studies indicated a significant effect of high glycemic index on sleep (two in young male athletes [N.=8 and N.=9] and one in adults [N.=8]), while three others failed to detect any significant effect (young males [N.=12], children [N.=8], toddlers [N.=56]). Among the cross-sectional studies, high glycemic index meals were associated with improved sleep duration or quality in two studies (594 toddlers and 1848 adults), however, contrastingly, were also associated with sleep disturbances (108 students and 53,069 postmenopausal women). CONCLUSIONS High glycemic index meals likely improve sleep onset latency in young males. For other indicators of sleep quality and other population groups, the results are equivocal. Most of the available studies were conducted in special population groups and were inadequately designed; whilst clinical trials were of short duration and small sample sizes. Therefore, further well-designed clinical trials are required before further definitive conclusions can be made.
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Affiliation(s)
- Ehsan Amiri-Ardekani
- Department of Phytopharmaceuticals (Traditional Pharmacy), Faculty of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran.,Student Research Committee, Shiraz University of Medical Sciences, Shiraz, Iran.,Student Association of Indigenous Knowledge, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Asma Kazemi
- Nutrition Research Center, School of Nutrition and Food Sciences, Shiraz University of Medical Sciences, Shiraz, Iran -
| | - Najmeh Sasani
- Nutrition Research Center, Department of Clinical Nutrition, School of Nutrition and Food Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Francesco Fanfulla
- Respiratory Function and Sleep Unit, Scientific Institute of Pavia and Montescano, Istituti Clinici Scientifici Maugeri IRCCS, Pavia, Italy
| | - Cain C Clark
- Center for Intelligent Healthcare, Coventry University, Coventry, UK
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3
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Guerra BA, Pereira TG, Eckert IC, Bernardes S, Silva FM. Markers of respiratory function response to high-carbohydrate and high-fat intake in patients with lung diseases: a systematic review with meta-analysis of randomized clinical trials. JPEN J Parenter Enteral Nutr 2022; 46:1522-1534. [PMID: 35437762 DOI: 10.1002/jpen.2385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 04/08/2022] [Accepted: 04/13/2022] [Indexed: 11/06/2022]
Abstract
BACKGROUND Macronutrients can differently affect respiratory function markers such as VO2 , VCO2 , PaO2 , PaCO2 and respiratory quotients (RQ), but systematic appraisal of the evidence on randomized clinical trials (RCTs) is lacking. OBJECTIVE To compare the response of respiratory function markers to high-carbohydrate and high-fat intake in patients with lung diseases. METHODS Systematic review conducted according to Cochrane Collaboration recommendations, reported following PRISMA 2020. PubMed, EMBASE, Scopus, and Cochrane CENTRAL were searched up to July/2021. Two reviewers selected the RCTs and extracted the data. Risk of bias and the certainty of evidence were assessed by RoB 2 and GRADE, respectively. Statistical and graphical data guided the publication bias investigation. Meta-analyses were conducted. RESULTS We included 14 RCTs (362 participants), four of which were parallel. Most studies included patients with COPD. High-fat intake decreased VCO2 [MD = -35.89(95%CI -45.24; -26.21) ml/min; I²=0%], VO2 [MD= -29.30(95% CI -40.94, -17.66) ml/min; I² = 0%], PaCO2 [MD = -4.62(95%CI -7.67; -1.58) mmHg; I²=84%], and RQ [MD = -0.08(95%CI -0.09; -0.06); I² = 0%] in the subset of parallel RCTs. In crossover RCTs, there was generally no evidence of effect except for a greater decrease in RQ [MD = -0.09(95%CI -0.12; -0.02); I² = 96%] in favor of high fat intake. CONCLUSION High-fat intake resulted in greater reductions of VCO2 , VO2 , PaCO2 , and RQ in adult patients with lung diseases. The certainty of the evidence is very low/ low, and it precludes a specific recommendation on macronutrients contribution to energy intake of these patients. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Bruno A Guerra
- Registered Dietitian, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, Rio Grande do Sul, Brazil
| | - Thainá G Pereira
- Registered Dietitian, Msc, Nutrition Science Graduate Program of Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, Rio Grande do Sul, Brazil
| | - Igor C Eckert
- Registered Dietitian, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, Rio Grande do Sul, Brazil
| | - Simone Bernardes
- Registered Dietitian, Msc, PhD student, Graduate Program of Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, Rio Grande do Sul, Brazil
| | - Flávia M Silva
- Registered Dietitian, Professor, Researcher, PhD, Nutrition Department and Nutrition Science Graduate Program of Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, Rio Grande do Sul, Brazil
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4
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Wong S, Subong P, Graham A, Wail A, Derry F, Saif M, Belci M. Predictive equations over estimating resting metabolic rate in individual with spinal cord injury requiring mechanical ventilation support - A case series. J Spinal Cord Med 2022; 45:151-154. [PMID: 32202479 PMCID: PMC8890569 DOI: 10.1080/10790268.2020.1737789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Abstract
Context: The impact of mechanical ventilation on energy expenditure after spinal cord injury (SCI) is sparse. The objective of this case-series is to measure 15-minutes resting metabolic rate (RMR) to determine 24-hours measured-RMR (m-RMR) using QUARK indirect calorimeter (IC) and; compare the m-RMR with estimated RMR (e-RMR) using four commonly used predictive equations (Harris-Benedict, Mifflin St-Jeor, Henry and Schofield).Findings: We measured the RMR of four patients with SCI (one male and three female; mean age: 58.3 years) all with complete tetraplegia (ISNCSCI A) twice in a one-week interval using an IC with two sampling flow settings during a six month period. The median (IQ) of all m-RMRs was 1094 (340.2) kcal/day. The median m-RMR was 40.1% lower than the median calculated with four different e-RMRs using predictive equations. All four predictive equations overestimated RMR in SCI patients requiring mechanical ventilation by 4.1-61.1% (Harris-Benedict: 28.8-60.6%; Mifflin St-Jeor: 6.9-61.1%; Henry: 4.1-58.9% and; Schofield: 6-54.6%).Conclusion/clinical relevance: There is a high variability of e-RMR and m-RMR in patients with SCI who are dependent on mechanical ventilation. The use of predictive equations may lead to over-estimation of energy requirements. To avoid overfeeding we recommended measuring RMR using IC wherever possible. A further study with a larger sample size is needed due to the small number of subjects in our case-series. Development of a validated RMR equation in the SCI population is warranted.
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Affiliation(s)
- Samford Wong
- National Spinal Injuries Centre, Stoke Mandeville Hospital, Aylesbury, UK,School of Health Science, University of London, London, UK,Correspondence to: Samford Wong, Department of Nutrition and Dietetics, National Spinal Injuries Centre, Stoke Mandeville Hospital, AylesburyHP21 8AL, UK; +44 (0)1296 315049.
| | - Paul Subong
- National Spinal Injuries Centre, Stoke Mandeville Hospital, Aylesbury, UK
| | - Allison Graham
- National Spinal Injuries Centre, Stoke Mandeville Hospital, Aylesbury, UK
| | - Ahmed Wail
- National Spinal Injuries Centre, Stoke Mandeville Hospital, Aylesbury, UK
| | - Fadel Derry
- National Spinal Injuries Centre, Stoke Mandeville Hospital, Aylesbury, UK
| | - Mofid Saif
- National Spinal Injuries Centre, Stoke Mandeville Hospital, Aylesbury, UK
| | - Maurizio Belci
- National Spinal Injuries Centre, Stoke Mandeville Hospital, Aylesbury, UK
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5
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Gangitano E, Tozzi R, Mariani S, Lenzi A, Gnessi L, Lubrano C. Ketogenic Diet for Obese COVID-19 Patients: Is Respiratory Disease a Contraindication? A Narrative Review of the Literature on Ketogenic Diet and Respiratory Function. Front Nutr 2021; 8:771047. [PMID: 34957183 PMCID: PMC8695871 DOI: 10.3389/fnut.2021.771047] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Accepted: 11/17/2021] [Indexed: 12/18/2022] Open
Abstract
Morbid obese people are more likely to contract SARS-CoV-2 infection and its most severe complications, as need for mechanical ventilation. Ketogenic Diet (KD) is able to induce a fast weight loss preserving lean mass and is particularly interesting as a preventive measure in obese patients. Moreover, KD has anti-inflammatory and immune-modulating properties, which may help in preventing the cytokine storm in infected patients. Respiratory failure is actually considered a contraindication for VLCKD, a very-low calorie form of KD, but in the literature there are some data reporting beneficial effects on respiratory parameters from ketogenic and low-carbohydrate high-fat diets. KD may be helpful in reducing ventilatory requirements in respiratory patients, so it should be considered in specifically addressed clinical trials as an adjuvant therapy for obese patients infected with SARS-CoV-2.
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Affiliation(s)
- Elena Gangitano
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - Rossella Tozzi
- Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy
| | - Stefania Mariani
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - Andrea Lenzi
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - Lucio Gnessi
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - Carla Lubrano
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
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6
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Albert BD, Spolidoro GC, Mehta NM. Metabolism and energy prescription in critically III children. Minerva Anestesiol 2021; 87:1025-1033. [PMID: 33853268 DOI: 10.23736/s0375-9393.21.14825-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Optimal nutrition therapy can positively influence clinical outcomes in critically ill children. Accurate assessment of nutritional status, metabolic state, macronutrient requirements and substrate utilization allows accurate prescription of nutrition in this population. In response to stress and injury, the body undergoes adaptive physiologic changes leading to dysregulation of the inflammatory response and hyperactivation of the inflammatory cascade. This results in a global catabolic state with modification in oxygen consumption and macronutrient metabolism. A comprehensive understanding of the metabolic response is essential when prescribing nutritional interventions aimed to offset the burden of this adaptive stress response in the critically ill. In this narrative review we aim to provide a comprehensive review of the physiologic basis, recent literature and some emerging concepts related to energy expenditure and the practical aspects of energy delivery in the critically ill child. Based on the unique metabolic characteristics of the critically ill child, we aim to provide a pragmatic approach to providing nutrition therapy.
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Affiliation(s)
- Ben D Albert
- Department of Anesthesiology, Critical Care and Pain Medicine, Boston Children's Hospital, Boston, MA, USA.,Harvard Medical School, Cambridge, MA, USA
| | - Giulia C Spolidoro
- Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
| | - Nilesh M Mehta
- Department of Anesthesiology, Critical Care and Pain Medicine, Boston Children's Hospital, Boston, MA, USA - .,Harvard Medical School, Cambridge, MA, USA.,Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy.,Center for Nutrition, Boston Children's Hospital, Boston, MA, USA
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7
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Association of resting energy expenditure and nutritional substrate oxidation with COPD stage and prediction indexes. Respir Med 2020; 174:106174. [PMID: 33086136 DOI: 10.1016/j.rmed.2020.106174] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 09/21/2020] [Accepted: 09/23/2020] [Indexed: 11/23/2022]
Abstract
While increase in resting energy expenditure (REE) of COPD patients is generally accepted, there is a lack of information about nutritional substrates oxidation (NSO) in this specific population. The aim of this study was comparison of REE and NSO from indirect calorimetry between COPD patients and control subjects and to evaluate possible associations with the disease stage and prediction indexes. In this observational study, 50 consecutive outpatients with stable COPD (COPD group) were examined and compared with 25 volunteers without respiratory problems (control group). Body composition, REE and NSO were determined in all study participants. All COPD subjects underwent a comprehensive examination to determine COPD severity and prognostic scales. Measured REE values adjusted for body weight, fat-free mass (FFM), and body surface were approximately 10% higher in COPD patients than in the control group. Respiratory quotient (RQ) and non-protein RQ (nRQ) values were respectively 5% and 10% higher in the COPD group. Adjusted carbohydrate oxidation was almost two times higher in comparison with the control group. We found no differences in absolute values of lipid and protein oxidation between the groups. Correlation analysis proved a positive association of relatively expressed REE and oxidation of lipids, and a negative association of RQ, nRQ and oxidation of carbohydrates with the value of prediction indexes. In conclusion, our study demonstrated metabolic changes in COPD patients leading to increased values of REE and changes in NSO which were associated with the disease stage, and which can be applied for nutritional support in clinical practice.
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8
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Rondanelli M, Faliva MA, Peroni G, Infantino V, Gasparri C, Iannello G, Perna S, Alalwan TA, Al-Thawadi S, Corsico AG. Food Pyramid for Subjects with Chronic Obstructive Pulmonary Diseases. Int J Chron Obstruct Pulmon Dis 2020; 15:1435-1448. [PMID: 32606652 PMCID: PMC7310971 DOI: 10.2147/copd.s240561] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Accepted: 04/20/2020] [Indexed: 02/02/2023] Open
Abstract
Nutritional problems are an important part of rehabilitation for chronic obstructive pulmonary disease (COPD) patients. COPD patients often present with malnutrition, sarcopenia, and osteoporosis with possible onset of cachexia, with an inadequate dietary intake and a poor quality of life. Moreover, diet plays a pivotal role in patients with COPD through three mechanisms: regulation of carbon dioxide produced/oxygen consumed, inflammation, and oxidative stress. A narrative review based on 99 eligible studies was performed to evaluate current evidence regarding optimum diet therapy for the management of COPD, and then a food pyramid was built accordingly. The food pyramid proposal will serve to guide energy and dietary intake in order to prevent and treat nutritionally related COPD complications and to manage progression and COPD-related symptoms. The nutrition pyramid described in our narrative review is hypothetical, even in light of several limitations of the present review; the main limitation is the fact that to date there are no randomized controlled trials in the literature clearly showing that improved nutrition, via the regulation of carbon dioxide produced/oxygen consumed, inflammation and oxidative stress, improves symptoms and/or progression of COPD. Even if this nutritional pyramid is hypothetical, we hope that it can serve the valuable purpose of helping researchers focus on the often-ignored possible connections between body composition, nutrition, and COPD.
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Affiliation(s)
- Mariangela Rondanelli
- IRCCS Mondino Foundation, Pavia 27100, Italy.,Department of Public Health, Experimental and Forensic Medicine, Unit of Human and Clinical Nutrition, University of Pavia, Pavia 27100, Italy
| | - Milena Anna Faliva
- Endocrinology and Nutrition Unit, Azienda di Servizi alla Persona "Istituto Santa Margherita", University of Pavia, Pavia 27100, Italy
| | - Gabriella Peroni
- Endocrinology and Nutrition Unit, Azienda di Servizi alla Persona "Istituto Santa Margherita", University of Pavia, Pavia 27100, Italy
| | - Vittoria Infantino
- Department of Public Health, Experimental and Forensic Medicine, Unit of Human and Clinical Nutrition, University of Pavia, Pavia 27100, Italy
| | - Clara Gasparri
- Endocrinology and Nutrition Unit, Azienda di Servizi alla Persona "Istituto Santa Margherita", University of Pavia, Pavia 27100, Italy
| | - Giancarlo Iannello
- General Management, Azienda di Servizi alla Persona "Istituto Santa Margherita", Pavia 27100, Italy
| | - Simone Perna
- Department of Biology, College of Science, University of Bahrain, Sakhir 32038, Bahrain
| | | | - Salwa Al-Thawadi
- Department of Biology, College of Science, University of Bahrain, Sakhir 32038, Bahrain
| | - Angelo Guido Corsico
- Center for Diagnosis of Inherited Alpha 1-Antitrypsin Deficiency, Department of Internal Medicine and Therapeutics, University of Pavia, Pavia 27100, Italy.,Division of Respiratory Diseases, IRCCS Policlinico San Matteo Foundation, Pavia 27100, Italy
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9
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Parvizian MK, Dhaliwal M, Li J, Satia I, Kurmi OP. Relationship between dietary patterns and COPD: a systematic review and meta-analysis. ERJ Open Res 2020; 6:00168-2019. [PMID: 32420316 PMCID: PMC7211952 DOI: 10.1183/23120541.00168-2019] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Accepted: 02/28/2020] [Indexed: 12/25/2022] Open
Abstract
Background Findings from previous studies reporting on the associations between chronic obstructive pulmonary disease (COPD) and various dietary patterns have been inconsistent. This review aims to summarise the evidence on the strength of the association between dietary patterns and the prevalence and incidence of COPD. Methods We conducted a comprehensive search of seven databases between 1 January 1980 and 30 November 2019. Two reviewers independently reviewed each manuscript through the screening, selection, data extraction and quality assessment stages. Data from eight observational studies that met the inclusion criteria were extracted and random-effects meta-analysis was subsequently conducted. Results Eight observational studies (all eight reporting on healthy dietary patterns and three on unhealthy dietary patterns) met the inclusion criteria and data were extracted to include in the meta-analysis. Consumption of a healthy dietary pattern was associated with a lower risk of COPD (pooled OR 0.88, 95% CI 0.82–0.94). Consumption of unhealthy dietary patterns was associated with a higher risk of COPD (OR 1.22, 95% CI 0.84–1.76); however, the results were not statistically significant and had high heterogeneity (I2=91%). Conclusion Our results suggests that healthy dietary patterns are associated with a lower prevalence of COPD, while unhealthy dietary patterns are not. More studies, particularly adequately powered longitudinal studies, are needed to further elucidate the effects of healthy and unhealthy dietary patterns on risk of COPD. This review suggests that individuals with healthy dietary pattern have lower risk of chronic obstructive pulmonary diseasehttp://bit.ly/331PVJ1
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Affiliation(s)
| | | | - Jeremy Li
- Dept of Medicine, McMaster University, Hamilton, ON, Canada
| | - Imran Satia
- Dept of Medicine, Division of Respirology, McMaster University, Hamilton, ON, Canada.,Faculty of Biology, Medicine and Health, Division of Infection, Immunity and Respiratory Medicine, University of Manchester, Manchester, UK
| | - Om P Kurmi
- Dept of Medicine, Division of Respirology, McMaster University, Hamilton, ON, Canada.,Population Health Research Institute, McMaster University, Hamilton, ON, Canada
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10
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Cornell K, Alam M, Lyden E, Wood L, LeVan TD, Nordgren TM, Bailey K, Hanson C. Saturated Fat Intake Is Associated with Lung Function in Individuals with Airflow Obstruction: Results from NHANES 2007⁻2012. Nutrients 2019; 11:nu11020317. [PMID: 30717299 PMCID: PMC6413158 DOI: 10.3390/nu11020317] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 01/28/2019] [Accepted: 01/29/2019] [Indexed: 01/14/2023] Open
Abstract
Nutritional status is a well-recognized prognostic indicator in chronic obstructive pulmonary disease (COPD); however, very little is known about the relationship between lung function and saturated fat intake. We used data from the cross-sectional National Health and Nutrition Examination Surveys (NHANES) to assess the relationship between saturated fatty acid (SFA) intake and lung function in the general US adult population. Adults in NHANES (2007⁻2012) with pre-bronchodilator spirometry measurements and dietary SFA intake were included. Primary outcomes were lung function including forced expiratory volume in one second (FEV₁), FEV₁, forced vital capacity (FVC), FEV₁/FVC ratio, percent predicted FEV₁ and percent predicted FVC. Multivariable regression models in the general population as well as those with spirometry-defined airflow obstruction were used to assess the relationship between lung function measurements and dietary SFA intake after adjustment for confounders. 11,180 eligible participants were included in this study. Univariate analysis revealed a statistically significant positive association between total SFA intake and lung function outcomes; however, these relationships were attenuated after adjustment for covariates. A secondary analysis of individuals with spirometry-defined airflow obstruction (FEV₁/FVC < 0.7) revealed that a lower intake of SFA was associated with reduced FEV1 (β = -126.4, p = 0.04 for quartile 1 vs. quartile 4), FVC (β = -165.8. p = 0.01 for quartile 1 vs. quartile 4), and percent predicted FVC (β = -3.3. p = 0.04 for quartile 1 vs. quartile 4), after adjustment for relevant confounders. No associations were observed for the FEV₁/FVC ratio and percent predicted FEV₁. It is possible that characteristics such as food source and fatty acid chain length may influence associations between saturated fatty acid intake and health outcomes.
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Affiliation(s)
- Kasey Cornell
- Internal Medicine Pulmonary, University of Nebraska Medical Center, Omaha, NE 68198, USA.
| | - Morshed Alam
- College of Public Health, University of Nebraska Medical Center, Omaha, NE 68198, USA.
| | - Elizabeth Lyden
- College of Public Health, University of Nebraska Medical Center, Omaha, NE 68198, USA.
| | - Lisa Wood
- School of Biomedical Sciences and Pharmacy, University of Newcastle, Newcastle NSW 2308, Australia.
| | - Tricia D LeVan
- Internal Medicine Pulmonary, University of Nebraska Medical Center, Omaha, NE 68198, USA.
- College of Public Health Epidemiology, University of Nebraska, Omaha, NE 68198, USA.
- Research Service, VA Nebraska-Western Iowa Health Care System, Omaha, NE 68105, USA.
| | - Tara M Nordgren
- Division of Biomedical Sciences, University of California Riverside, Riverside, CA 92521, USA.
| | - Kristina Bailey
- Internal Medicine Pulmonary, University of Nebraska Medical Center, Omaha, NE 68198, USA.
| | - Corrine Hanson
- Medical Nutrition Education, College of Allied Health Professions, University of Nebraska Medical Center, Omaha, NE 68198, USA.
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11
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Al-Dorzi HM, Aldawood AS, Tamim H, Haddad SH, Jones G, McIntyre L, Solaiman O, Sakhija M, Sadat M, Afesh L, Kumar A, Bagshaw SM, Mehta S, M Arabi Y. Caloric intake and the fat-to-carbohydrate ratio in hypercapnic acute respiratory failure: Post-hoc analysis of the PermiT trial. Clin Nutr ESPEN 2018; 29:175-182. [PMID: 30661684 DOI: 10.1016/j.clnesp.2018.10.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Accepted: 10/22/2018] [Indexed: 01/31/2023]
Abstract
BACKGROUND The effect of moderate caloric enteral intake in critically ill patients with hypercapnic acute respiratory failure (HCARF) is unclear. We studied the impact of permissive underfeeding (PUF) compared with standard feeding (SF) on various HCARF outcomes. MATERIALS AND METHODS The PermiT trial randomized 894 patients to either PUF (40-60% caloric requirement) or SF (70-100% requirement) with similar protein intake and found no difference in mortality, mechanical ventilation (MV) duration and ventilator-free days. In this post-hoc study, we restricted analysis to mechanically-ventilated patients with HCARF (PaCO2 >45 mmHg on the first two study days) and assessed the impact of trial interventions and fat-to-carbohydrate ratio on outcomes. RESULTS One-hundred-twenty patients had HCARF (59 PUF and 61 SF, age 53.7 ± 17.8 years, body mass index 31.1 ± 11.2 kg/m2, Acute Physiology and Chronic Health Evaluation II score 21.7 ± 7.1 and day-1 PaCO2 61 ± 16 mmHg). Caloric intake was 815 ± 270 kcal/day in PUF group and 1289 ± 407 kcal/day in SF group. The two groups had similar PaCO2 levels during ICU stay. The 90-day mortality (33.9% versus 35.6%, p = 0.85), MV duration (10.7 ± 6.8 versus 11.1 ± 8.1 days, p = 0.56) and ventilator-free days (52.9 ± 38.6 versus 51.2 ± 38.0 days, p = 0.80) were also similar in PUF and SF groups, respectively. Ventilator-free days and 90-day mortality were similar when the fat-to-carbohydrate ratio was < or ≥ the median value (0.73) in all patients and in PUF and SF groups. CONCLUSIONS In patients with HCARF, SF and PUF were associated with similar PaCO2, MV duration, ventilator-free days and mortality. Fat-to-carbohydrate ratio was not associated with mortality or ventilator-free days. TRIAL REGISTRATION ISRCTN Registry: ISRCTN68144998.
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Affiliation(s)
- Hasan M Al-Dorzi
- Intensive Care Department, King Saud Bin Abdulaziz University for Health Sciences, King Abdullah International Medical Research Center, King Abdulaziz Medical City, Riyadh, Saudi Arabia.
| | - Abdulaziz S Aldawood
- Intensive Care Department, King Saud Bin Abdulaziz University for Health Sciences, King Abdullah International Medical Research Center, King Abdulaziz Medical City, Riyadh, Saudi Arabia.
| | - Hani Tamim
- King Saud Bin Abdulaziz University for Health Sciences, King Abdullah International Medical Research Center, Riyadh, Saudi Arabia; Department of Internal Medicine, American University of Beirut- Medical Center, Beirut, Lebanon.
| | - Samir H Haddad
- Intensive Care Department, King Saud Bin Abdulaziz University for Health Sciences, King Abdullah International Medical Research Center, King Abdulaziz Medical City, Riyadh, Saudi Arabia.
| | - Gwynne Jones
- Department of Medicine, Division of Critical Care Medicine, University of Ottawa, Ottawa Hospital Research Institute, Ottawa, Canada.
| | - Lauralyn McIntyre
- Department of Medicine, Division of Critical Care Medicine, University of Ottawa, Ottawa Hospital Research Institute, Ottawa, Canada.
| | - Othman Solaiman
- Department of Adult Critical Care, King Faisal Specialist Hospital and Research Center, Riyadh 11426, Saudi Arabia.
| | - Maram Sakhija
- Intensive Care Department, King Saud Bin Abdulaziz University for Health Sciences, King Abdullah International Medical Research Center, King Abdulaziz Medical City, Riyadh, Saudi Arabia.
| | - Musharaf Sadat
- Intensive Care Department, King Saud Bin Abdulaziz University for Health Sciences, King Abdullah International Medical Research Center, King Abdulaziz Medical City, Riyadh, Saudi Arabia.
| | - Lara Afesh
- King Saud Bin Abdulaziz University for Health Sciences, King Abdullah International Medical Research Center, Riyadh, Saudi Arabia.
| | | | - Sean M Bagshaw
- Department of Critical Care Medicine, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Canada.
| | - Sangeeta Mehta
- Department of Medicine and Interdepartmental Division of Critical Care Medicine, Mount Sinai Hospital and University of Toronto, Toronto, Ontario, Canada.
| | - Yaseen M Arabi
- Intensive Care Department, King Saud Bin Abdulaziz University for Health Sciences, King Abdullah International Medical Research Center, King Abdulaziz Medical City, Riyadh, Saudi Arabia.
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12
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Liao WH, Suendermann C, Steuer AE, Pacheco Lopez G, Odermatt A, Faresse N, Henneberg M, Langhans W. Aldosterone deficiency in mice burdens respiration and accentuates diet-induced hyperinsulinemia and obesity. JCI Insight 2018; 3:99015. [PMID: 30046010 DOI: 10.1172/jci.insight.99015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 06/08/2018] [Indexed: 12/20/2022] Open
Abstract
Aldosterone synthase inhibitors (ASIs) should alleviate obesity-related cardiovascular and renal problems resulting partly from aldosterone excess, but their clinical use may have limitations. To improve knowledge for the use of ASIs, we investigated physiology in aldosterone synthase-knockout (ASKO) mice. On regular chow diet (CD), ASKO mice ate more and weighed less than WT mice, largely because they hyperventilated to eliminate acid as CO2. Replacing CD with high-fat diet (HFD) lessened the respiratory burden in ASKO mice, as did 12- to 15-hour fasting. The latter eliminated the genotype differences in respiratory workload and energy expenditure (EE). Thus, aldosterone deficiency burdened the organism more when the animals ate carbohydrate-rich chow than when they ate a HFD. Chronic HFD exposure further promoted hyperinsulinemia in ASKO mice that contributed to visceral fat accumulation accompanied by reduced lipolysis, thermogenic reprogramming, and the absence of weight-gain-related EE increases. Intracerebroventricular aldosterone supplementation in ASKO mice attenuated the HFD-induced hyperinsulinemia, but did not affect EE, suggesting that the presence of aldosterone increased the body's energetic efficiency, thus counteracting the EE-increasing effect of low insulin. ASIs may therefore cause acid-overload-induced respiratory burden and promote obesity. Their use in patients with preexisting renal and cardiopulmonary diseases might be contraindicated.
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Affiliation(s)
- Wan-Hui Liao
- Physiology and Behavior Laboratory, Institute of Food, Nutrition and Health, ETH Zurich, Schwerzenbach, Switzerland.,Institute of Anatomy, University of Zurich, Zurich, Switzerland.,Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Zurich, Switzerland.,National Center of Competence in Research "Kidney.CH", Switzerland
| | | | - Andrea Eva Steuer
- Department of Forensic Pharmacology and Toxicology, Zurich Institute of Forensic Medicine, University of Zurich, Zurich, Switzerland
| | - Gustavo Pacheco Lopez
- Physiology and Behavior Laboratory, Institute of Food, Nutrition and Health, ETH Zurich, Schwerzenbach, Switzerland.,Department of Health Sciences, Division of Biological and Health Sciences, Metropolitan Autonomous University (UAM), Lerma, Mexico
| | - Alex Odermatt
- National Center of Competence in Research "Kidney.CH", Switzerland.,Division of Molecular and Systems Toxicology, Department of Pharmaceutical Sciences, University of Basel, Basel, Switzerland
| | - Nourdine Faresse
- Institute of Anatomy, University of Zurich, Zurich, Switzerland.,Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Zurich, Switzerland.,National Center of Competence in Research "Kidney.CH", Switzerland
| | - Maciej Henneberg
- Institute of Evolutionary Medicine, University of Zurich, Zurich, Switzerland.,Biological Anthropology and Comparative Anatomy Unit, University of Adelaide, Australia
| | - Wolfgang Langhans
- Physiology and Behavior Laboratory, Institute of Food, Nutrition and Health, ETH Zurich, Schwerzenbach, Switzerland
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13
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Gorgey AS, Lawrence J. Acute Responses of Functional Electrical Stimulation Cycling on the Ventilation-to-CO2 Production Ratio and Substrate Utilization After Spinal Cord Injury. PM R 2015; 8:225-34. [PMID: 26493854 DOI: 10.1016/j.pmrj.2015.10.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 10/02/2015] [Accepted: 10/07/2015] [Indexed: 11/19/2022]
Abstract
BACKGROUND Ventilation-to-carbon dioxide ratio is comparable with peak oxygen uptake in the prognosis of cardiovascular disorders. Currently, there are no established indices to determine the submaximal effects of functional electrical stimulation on cardiovascular performance in persons with spinal cord injury. OBJECTIVE To determine the effects of an acute bout of functional electrical stimulation-lower extremity cycling on ventilation, carbon dioxide production, ventilation-to-carbon dioxide ratio, and substrate utilization in people with motor complete spinal cord injury. DESIGN Observational cross-sectional design. SETTING Clinical laboratory setting. PARTICIPANTS Ten individuals with motor complete spinal cord injury. METHODS Participants were allowed to cycle until fatigue. The effects of functional electrical stimulation on ventilation, carbon dioxide production, ventilation-to-carbon dioxide ratio, and substrate utilization were measured with a portable metabolic cart (COSMED K4b2). Body composition was determined with bioelectrical impedance. RESULTS Resting and warm-up ventilation were 8.15 ± 3.5 L/min and 8.15 ± 2.8 L/min, respectively. Functional electrical stimulation increased ventilation significantly (14.5 ± 6.4 L/min), which remained significantly elevated (13.3 ± 4.3 L/min) during the recovery period. During resting and warm-up phases, the ventilation-to-carbon dioxide ratios were 41 ± 4.8 and 38 ± 5.4, respectively. Functional electrical stimulation decreased the ventilation-to-carbon dioxide ratio significantly to 31.5 ± 4, which remained significantly reduced during the recovery period (34.4 ± 3). Functional electrical stimulation relied primarily on carbohydrate utilization (188 ± 160 g/day to 574 ± 324 g/day; P = .001) with no changes in fat utilization (77.5 ± 28 g/day to 93.5 ± 133.6 g/day; P = .7) from resting to exercise periods. Significant relationships were noted between carbohydrate utilization during functional electrical stimulation and carbon dioxide (r = 0.98; P = .00010) production. The percentage whole body fat-free mass was negatively related to the exercise ventilation-to-carbon ratio (r = -0.66; P = .045). CONCLUSIONS An acute bout of functional electrical stimulation resulted in a significant drop in the ventilation-to-carbon ratio, accompanied with a reliance on carbohydrate utilization and a diminished capacity to utilize fat as a substrate. Fat-free mass may be associated with a decrease in ventilation to carbon dioxide ratio and an increase in carbohydrate utilization in persons with spinal cord injury.
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Affiliation(s)
- Ashraf S Gorgey
- Spinal Cord Injury and Disorders Center, Hunter Holmes McGuire VAMC, 1201 Broad Rock Boulevard, Richmond, VA 23249; and Department of Physical Medicine and Rehabilitation, Virginia Commonwealth University, Richmond, VA(∗).
| | - Justin Lawrence
- Spinal Cord Injury and Disorders Center, Hunter Holmes McGuire VAMC, and College of Health and Human Performance; Virginia Commonwealth University, Richmond, VA(†)
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14
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Martinez EE, Bechard LJ, Smallwood CD, Duggan CP, Graham RJ, Mehta NM. Impact of Individualized Diet Intervention on Body Composition and Respiratory Variables in Children With Respiratory Insufficiency: A Pilot Intervention Study. Pediatr Crit Care Med 2015; 16:e157-64. [PMID: 25944746 PMCID: PMC4497837 DOI: 10.1097/pcc.0000000000000428] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
OBJECTIVES Diet modification may improve body composition and respiratory variables in children with respiratory insufficiency. Our objective was to examine the effect of an individualized diet intervention on changes in weight, lean body mass, minute ventilation, and volumetric CO2 production in children dependent on long-term mechanical ventilatory support. DESIGN Prospective, open-labeled interventional study. SETTING Study subjects' homes. PATIENTS Children, 1 month to 17 years old, dependent on at least 12 hr/d of transtracheal mechanical ventilatory support. INTERVENTIONS Twelve weeks of an individualized diet modified to deliver energy at 90-110% of measured energy expenditure and protein intake per age-based guidelines. MEASUREMENTS AND MAIN RESULTS During a multidisciplinary home visit, we obtained baseline values of height and weight, lean body mass percent by bioelectrical impedance analysis, actual energy and protein intake by food record, and measured energy expenditure by indirect calorimetry. An individualized diet was then prescribed to optimize energy and protein intake. After 12 weeks on this interventional diet, we evaluated changes in weight, height, lean body mass percent, minute ventilation, and volumetric CO2 production. Sixteen subjects, mean age 9.3 years (SD, 4.9), eight male, completed the study. For the diet intervention, a majority of subjects required a change in energy and protein prescription. The mean percentage of energy delivered as carbohydrate was significantly decreased, 51.7% at baseline versus 48.2% at follow-up, p = 0.009. Mean height and weight increased on the modified diet. Mean lean body mass percent increased from 58.3% to 61.8%. Minute ventilation was significantly lower (0.18 L/min/kg vs 0.15 L/min/kg; p = 0.04), and we observed a trend toward lower volumetric CO2 production (5.4 mL/min/kg vs 5.3 mL/min/kg; p = 0.06) after 12 weeks on the interventional diet. CONCLUSIONS Individualized diet modification is feasible and associated with a significant decrease in minute ventilation, a trend toward significant reduction in CO2 production, and improved body composition in children on long-term mechanical ventilation. Optimization of respiratory variables and lean body mass by diet modification may benefit children with respiratory insufficiency in the ICU.
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Affiliation(s)
- Enid E Martinez
- 1Division of Critical Care Medicine, Department of Anesthesiology, Perioperative and Pain Medicine, Boston Children's Hospital, Boston, MA. 2Harvard Medical School, Boston, MA. 3Division of Gastroenterology, Hepatology and Nutrition, Boston Children's Hospital, Boston, MA
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15
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Martinez EE, Smallwood CD, Bechard LJ, Graham RJ, Mehta NM. Metabolic assessment and individualized nutrition in children dependent on mechanical ventilation at home. J Pediatr 2015; 166:350-7. [PMID: 25444009 DOI: 10.1016/j.jpeds.2014.09.036] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Revised: 08/14/2014] [Accepted: 09/19/2014] [Indexed: 01/16/2023]
Abstract
OBJECTIVE To evaluate the nutritional and metabolic status and body composition of children on long-term mechanical ventilation using a home-based model. STUDY DESIGN Children on home mechanical ventilation, for at least 12 hours a day, were eligible. We performed anthropometry, bioelectrical impedance analysis (BIA), actual energy intake (AEI), and indirect calorimetry in the subject's home. Agreement between measured energy expenditure (MEE) from indirect calorimetry, and estimated energy expenditure by the Schofield equation and a novel volumetric carbon dioxide production-based equation was examined. Agreement between fat mass estimates from anthropometry and BIA was examined and compared with population norms. RESULTS We enrolled 20 children, 11 (55%) male; mean age 8.4 years (SD 4.8). Mean weight for age z-score was -0.26 (SD 1.48); 9/20 had z-scores <-1 or >+1. Thirteen were underfed (AEI:MEE <90%) or overfed (AEI:MEE >110%); 11 of 19 had protein intake that was less than recommended by guidelines. Fifteen subjects were hypo- or hypermetabolic. Mean (SD) fat mass % was 33.6% (8.6) by anthropometry, which was significantly greater than matched population norms (mean 23.0%, SD 6.1, P < .001). The estimated energy expenditure by a volumetric carbon dioxide production-based equation was in stronger agreement with the MEE than the Schofield equation (mean bias 0.06%, limits -15.98% to 16.16% vs mean bias -1.31%, limits -74.3% to 72%, respectively). BIA and anthropometric fat mass values were not in agreement. CONCLUSION A majority of children on home ventilation are characterized by malnutrition, altered metabolic status, and suboptimal macronutrient intake, in particular low protein intake. A multidisciplinary home-based model facilitates individualized energy and protein delivery and may improve outcomes in this cohort.
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Affiliation(s)
- Enid E Martinez
- Division of Critical Care Medicine, Department of Anesthesiology, Perioperative and Pain Medicine, Boston Children's Hospital, Boston, MA; Harvard Medical School, Boston, MA
| | | | - Lori J Bechard
- Center for Nutrition, Boston Children's Hospital, Boston, MA
| | - Robert J Graham
- Division of Critical Care Medicine, Department of Anesthesiology, Perioperative and Pain Medicine, Boston Children's Hospital, Boston, MA; Harvard Medical School, Boston, MA
| | - Nilesh M Mehta
- Division of Critical Care Medicine, Department of Anesthesiology, Perioperative and Pain Medicine, Boston Children's Hospital, Boston, MA; Harvard Medical School, Boston, MA; Center for Nutrition, Boston Children's Hospital, Boston, MA.
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16
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Energy expenditure: how much does it matter in infant and pediatric chronic disorders? Pediatr Res 2015; 77:168-72. [PMID: 25365533 DOI: 10.1038/pr.2014.180] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2014] [Accepted: 10/18/2014] [Indexed: 01/18/2023]
Abstract
A sound understanding of energy needs during chronic illness is necessary to avoid imbalances in energy intake and requirements. Failure to accurately estimate energy needs results in both underfeeding and overfeeding in chronically ill children. Suboptimal energy and protein intake may lead to deterioration in body composition, particularly lean body mass loss, which eventually impacts functional outcomes in these vulnerable groups. Furthermore, infants and children with chronic illnesses have a high prevalence of malnutrition and can ill afford further nutritional deterioration from suboptimal nutrient delivery. On the other hand, unintended delivery of excessive energy in patients with chronic respiratory insufficiency results in increased respiratory burden and poor outcomes. Hence, awareness of the energy requirements and attention to energy and protein balance are important when caring for children with chronic illnesses. The basic concepts of the metabolic stress response, measurement of energy expenditure, and the impact of energy imbalance on clinical outcomes in children with chronic illness are reviewed.
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17
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Schols AM, Ferreira IM, Franssen FM, Gosker HR, Janssens W, Muscaritoli M, Pison C, Rutten-van Mölken M, Slinde F, Steiner MC, Tkacova R, Singh SJ. Nutritional assessment and therapy in COPD: a European Respiratory Society statement. Eur Respir J 2014; 44:1504-20. [PMID: 25234804 DOI: 10.1183/09031936.00070914] [Citation(s) in RCA: 184] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Nutrition and metabolism have been the topic of extensive scientific research in chronic obstructive pulmonary disease (COPD) but clinical awareness of the impact dietary habits, nutritional status and nutritional interventions may have on COPD incidence, progression and outcome is limited. A multidisciplinary Task Force was created by the European Respiratory Society to deliver a summary of the evidence and description of current practice in nutritional assessment and therapy in COPD, and to provide directions for future research. Task Force members conducted focused reviews of the literature on relevant topics, advised by a methodologist. It is well established that nutritional status, and in particular abnormal body composition, is an important independent determinant of COPD outcome. The Task Force identified different metabolic phenotypes of COPD as a basis for nutritional risk profile assessment that is useful in clinical trial design and patient counselling. Nutritional intervention is probably effective in undernourished patients and probably most when combined with an exercise programme. Providing evidence of cost-effectiveness of nutritional intervention is required to support reimbursement and thus increase access to nutritional intervention. Overall, the evidence indicates that a well-balanced diet is beneficial to all COPD patients, not only for its potential pulmonary benefits, but also for its proven benefits in metabolic and cardiovascular risk.
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Affiliation(s)
- Annemie M Schols
- NUTRIM School for Nutrition, Toxicology and Metabolism, Dept of Respiratory Medicine, Maastricht University Medical Centre+, Maastricht, The Netherlands
| | - Ivone M Ferreira
- Asthma and Airways Centre, Toronto Western Hospital, Toronto, Canada Dept of Respiratory Medicine, McMaster University, Hamilton, Canada
| | - Frits M Franssen
- Program Development Centre, CIRO+ (Centre of Expertise for Chronic Organ Failure), Horn, The Netherlands
| | - Harry R Gosker
- NUTRIM School for Nutrition, Toxicology and Metabolism, Dept of Respiratory Medicine, Maastricht University Medical Centre+, Maastricht, The Netherlands
| | - Wim Janssens
- Laboratory of Respiratory Medicine, Katholieke Universiteit, Leuven, Belgium
| | | | - Christophe Pison
- Clinique Universitaire de Pneumologie, Institut du Thorax, CHU Grenoble, Grenoble, France Inserm U1055, Grenoble, France Université Joseph Fourier, Grenoble, France European Institute for Systems Biology and Medicine, Lyon, France
| | - Maureen Rutten-van Mölken
- Erasmus University Rotterdam, Institute of Health Policy and Management, Rotterdam The Netherlands Erasmus University Rotterdam, Institute of Medical Technology Assessment, Rotterdam, The Netherlands
| | - Frode Slinde
- Dept of Internal Medicine and Clinical Nutrition, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
| | - Michael C Steiner
- Centre for Exercise and Rehabilitation Science, Leicester Respiratory Biomedical Research Unit, University Hospitals of Leicester NHS Trust, Glenfield Hospital, Leicester, UK
| | - Ruzena Tkacova
- Dept of Respiratory Medicine, Faculty of Medicine, P.J. Safarik University, Kosice, Slovakia L. Pasteur University Hospital, Kosice, Slovakia
| | - Sally J Singh
- Centre for Exercise and Rehabilitation Science, Leicester Respiratory Biomedical Research Unit, University Hospitals of Leicester NHS Trust, Glenfield Hospital, Leicester, UK
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18
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Mehta NM, Smallwood CD, Graham RJ. Current applications of metabolic monitoring in the pediatric intensive care unit. Nutr Clin Pract 2014; 29:338-47. [PMID: 24699395 DOI: 10.1177/0884533614526259] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Delivery of adequate nutrients during illness to counteract the metabolic stress response and facilitate healing and tissue repair is an important goal in the care of critically ill children. With recent advances in technology, accurate minute-to-minute gas exchange and energy expenditure measurements are now available in intensive care units. The bedside availability of these devices may allow a titrated approach to energy delivery for patients, ushering in a new era of individualized nutrition therapy. Basic concepts, available monitoring devices, indications, pitfalls, and bedside application of metabolic monitoring are discussed in this article.
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Affiliation(s)
- Nilesh M Mehta
- Division of Critical Care Medicine, Department of Anaesthesia, Perioperative and Pain Medicine, Boston Children's Hospital, Boston, Massachusetts
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19
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Abstract
Nutrition therapy is an essential aspect of patient care and an important determinant of outcomes in the ICU. Nutrition can impact respiratory function in a myriad of ways. Under- and overfeeding are two well-established ways by which nutrition impinges on respiratory function. Route of feeding, method of feeding, and carbohydrate composition of the diet are also other key factors regarding nutrition that influence outcomes in ICU patients. Recent studies are now elucidating the role of immune therapy in patients with acute respiratory distress syndrome. In the ICU, nutrition dogmas, such as the necessity of checking gastric residual volumes or utilizing full-calorie enteric feeds, as opposed to trophic feeds, are constantly being challenged by innovative clinical studies. Basic research brings the prospect of testing new approaches for ICU patients, such as the use of antioxidants to prevent diaphragm weakness in these patients. In this review article, we evaluate the recent observational and randomized control trials to critically appraise the evidence regarding nutrition in the ICU.
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20
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Collins PF, Elia M, Stratton RJ. Nutritional support and functional capacity in chronic obstructive pulmonary disease: A systematic review and meta-analysis. Respirology 2013; 18:616-29. [DOI: 10.1111/resp.12070] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2012] [Revised: 01/09/2013] [Accepted: 02/07/2013] [Indexed: 12/24/2022]
Affiliation(s)
| | - Marinos Elia
- Faculty of Medicine; Institute of Human Nutrition; Southampton General Hospital, University of Southampton; Southampton; UK
| | - Rebecca J. Stratton
- Faculty of Medicine; Institute of Human Nutrition; Southampton General Hospital, University of Southampton; Southampton; UK
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21
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Ferreira IM, Brooks D, White J, Goldstein R. Nutritional supplementation for stable chronic obstructive pulmonary disease. Cochrane Database Syst Rev 2012; 12:CD000998. [PMID: 23235577 DOI: 10.1002/14651858.cd000998.pub3] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND Individuals with chronic obstructive pulmonary disease (COPD) and low body weight have impaired pulmonary status, reduced diaphragmatic mass, lower exercise capacity and higher mortality than those who are adequately nourished. Nutritional support may be useful for their comprehensive care. OBJECTIVES To assess the impact of nutritional support on anthropometric measures, pulmonary function, respiratory and peripheral muscles strength, endurance, functional exercise capacity and health-related quality of life (HRQoL) in COPD.If benefit is demonstrated, to perform subgroup analysis to identify treatment regimens and subpopulations that demonstrate the greatest benefits. SEARCH METHODS We identified randomised controlled trials (RCTs) from the Cochrane Airways Review Group Trials Register, a handsearch of abstracts presented at international meetings and consultation with experts. Searches are current to April 2012. SELECTION CRITERIA Two review authors independently selected trials for inclusion, assessed risk of bias and extracted the data. Decisions were made by consensus. DATA COLLECTION AND ANALYSIS We used post-treatment values when pooling the data for all outcomes, and change from baseline scores for primary outcomes. We used mean difference (MD) to pool data from studies that measured outcomes with the same measurement tool and standardised mean difference (SMD) when the outcomes were similar but the measurement tools different. We contacted authors of the primary studies for missing data.We established clinical homogeneity prior to pooling. We presented the results with 95% confidence intervals (CI) in the text and in a 'Summary of findings' table. MAIN RESULTS We included 17 studies (632 participants) of at least two weeks of nutritional support. There was moderate-quality evidence (14 RCTs, 512 participants, nourished and undernourished) of no significant difference in final weight between those who received supplementation and those who did not (MD 0.69 kg; 95% CI -0.86 to 2.24). Pooled data from 11 RCTs (325 undernourished patients) found a statistically significant weight gain (MD 1.65 kg; 95% CI 0.14 to 3.16) in favour of supplementation; three RCTs (116 mixed population) found no significant difference between groups (MD -1.28 kg; 95% CI -6.27 to 3.72). However, when analysed as change from baseline, there was significant improvement with supplementation: 14 RCTs (five of which had imputed SE), MD 1.62 kg (95% CI 1.27 to 1.96 ); 11 RCTs (malnourished), MD 1.73 kg (95% CI 1.29 to 2.17) and three RCTs (mixed), MD 1.44 kg (95% CI 0.68 to 2.19).There was low-quality evidence from five RCTs (six comparisons, 287 participants) supporting a significant improvement from baseline for fat-free mass/fat-free mass index (SMD 0.57; 95% CI 0.04 to 1.09), which was larger for undernourished patients (three RCTs, 125 participants; SMD 1.08; 95% CI 0.70 to 1.47). There was no significant change from baseline noted for adequately nourished patients (one RCT, 71 participants; SMD 0.27; 95% CI -0.20 to 0.73), or for a mixed population (two RCTs, 91 participants; SMD -0.05; 95% CI -0.76 to 0.65).There was moderate-quality evidence from two RCTs (91 mixed participants) that nutritional supplementation significantly improved fat mass/fat mass index from baseline (SMD 0.90; 95% CI 0.46 to 1.33).There was low-quality evidence (eight RCTs, 294 participants) of an increase in mid-arm muscle circumference change (MAMC; MD 0.29; 95% CI 0.02 to 0.57).There was low-quality evidence (six RCTs, 125 participants) of no significant difference in change from baseline scores for triceps measures (MD 0.54; 95% CI -0.16 to 1.24).There was low-quality evidence (five RCTs, 142 participants) of no significant difference between groups in the six-minute walk distance (MD 14.05 m; 95% CI -24.75 to 52.84), 12-minute walk distance or in shuttle walking. However, the pooled change from baseline for the six-minute walk distance was significant (MD 39.96 m; 95% CI 22.66 to 57.26).There was low-quality evidence (seven RCTs, 228 participants) that there was no significant difference between groups in the forced expiratory volume in one second (FEV(1); SMD -0.01; 95% CI -0.31 to 0.30) when measured in litres or percentage predicted.There was low-quality evidence (nine RCTs, 245 participants) of no significant between group difference in maximum inspiratory pressure (MIP; MD 3.54 cm H(2)O; 95% CI -0.90 to 7.99), but those who received supplementation had a higher maximum expiratory pressure (MEP; MD 9.55 cm H(2)O; 95% CI 2.43 to 16.68). For malnourished patients (seven RCTs, 189 participants), those with supplementation had significantly better MIP (MD 5.02; 95% CI 0.29 to 9.76) and MEP (MD 12.73; 95% CI 4.91 to 20.55).There was low-quality evidence (four RCTs, 130 participants) of no significant difference in HRQoL total score (SMD -0.36; 95% CI -0.77 to 0.06) when pooling results from both the St George's Respiratory Questionnaire (SGRQ) and the Chronic Respiratory Questionnaire (CRQ).Two trials (67 participants) used the SGRQ to measure individual domains of activity, impact and symptoms. At the end of treatment, the pooled total SGRQ score was both statistically and clinically significant (MD -6.55; 95% CI -11.7 to -1.41). The three RCTs (123 participants) that used the CRQ to measure the change in individual domains (dyspnoea, fatigue, emotion, mastery), found no significant difference between groups. AUTHORS' CONCLUSIONS We found moderate-quality evidence that nutritional supplementation promotes significant weight gain among patients with COPD, especially if malnourished. Nourished patients may not respond to the same degree to supplemental feeding. We also found a significant change from baseline in fat-free mass index/fat-free mass, fat mass/fat mass index, MAMC (as a measure of lean body mass), six-minute walk test and a significant improvement in skinfold thickness (as measure of fat mass, end score) for all patients. In addition, there were significant improvements in respiratory muscle strength (MIP and MEP) and overall HRQoL as measured by SGRQ in malnourished patients with COPD.These results differ from previous reviews and should be considered in the management of malnourished patients with COPD.
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Affiliation(s)
- Ivone M Ferreira
- Asthma and Airways Centre, Toronto Western Hospital, Toronto, Canada.
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22
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Collins PF, Stratton RJ, Elia M. Nutritional support in chronic obstructive pulmonary disease: a systematic review and meta-analysis. Am J Clin Nutr 2012; 95:1385-95. [PMID: 22513295 DOI: 10.3945/ajcn.111.023499] [Citation(s) in RCA: 101] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND The efficacy of nutritional support in the management of malnutrition in chronic obstructive pulmonary disease (COPD) is controversial. Previous meta-analyses, based on only cross-sectional analysis at the end of intervention trials, found no evidence of improved outcomes. OBJECTIVE The objective was to conduct a meta-analysis of randomized controlled trials (RCTs) to clarify the efficacy of nutritional support in improving intake, anthropometric measures, and grip strength in stable COPD. DESIGN Literature databases were searched to identify RCTs comparing nutritional support with controls in stable COPD. RESULTS Thirteen RCTs (n = 439) of nutritional support [dietary advice (1 RCT), oral nutritional supplements (ONS; 11 RCTs), and enteral tube feeding (1 RCT)] with a control comparison were identified. An analysis of the changes induced by nutritional support and those obtained only at the end of the intervention showed significantly greater increases in mean total protein and energy intakes with nutritional support of 14.8 g and 236 kcal daily. Meta-analyses also showed greater mean (±SE) improvements in favor of nutritional support for body weight (1.94 ± 0.26 kg, P < 0.001; 11 studies, n = 308) and grip strength (5.3%, P < 0.050; 4 studies, n = 156), which was not shown by ANOVA at the end of the intervention, largely because of bias associated with baseline imbalance between groups. CONCLUSION This systematic review and meta-analysis showed that nutritional support, mainly in the form of ONS, improves total intake, anthropometric measures, and grip strength in COPD. These results contrast with the results of previous analyses that were based on only cross-sectional measures at the end of intervention trials.
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Affiliation(s)
- Peter F Collins
- Institute of Human Nutrition, Faculty of Medicine, University of Southampton, Southampton General Hospital, Southampton, UK
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23
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Hypoventilation and Respiratory Muscle Dysfunction. Crit Care Med 2008. [DOI: 10.1016/b978-032304841-5.50043-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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24
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Schols A. Nutritional modulation as part of the integrated management of chronic obstructive pulmonary disease. Proc Nutr Soc 2007; 62:783-91. [PMID: 15018476 DOI: 10.1079/pns2003303] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Weight loss is a frequent complication in patients with chronic obstructive pulmonary disease (COPD) and is a determining factor for functional capacity, health status and mortality. Weight loss in COPD is a consequence of an inbalance between increased energy requirements and dietary intake. Both metabolic and mechanical inefficiency may contribute to elevated energy expenditure during physical activity, while systemic inflammation has been associated with hypermetabolism at rest. Disease-specific symptoms and systemic inflammation may impair appetite and dietary intake. Altered intermediary metabolism may cause disproportionate wasting of fat-free mass in some patients. A combination of nutritional support and exercise as an anabolic stimulus appears to be the best approach to obtaining marked functional improvement. Patients responding to this treatment even demonstrated a decreased mortality. The effectiveness of anti-catabolic modulation requires further investigation.
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Affiliation(s)
- Annemie Schols
- Department of Respiratory Medicine, University Hospital Maastricht, PO Box 5800, 6202 AZ Maastricht, The Netherlands.
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25
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Mattison S, Christensen M. The pathophysiology of emphysema: considerations for critical care nursing practice. Intensive Crit Care Nurs 2006; 22:329-37. [PMID: 16901700 DOI: 10.1016/j.iccn.2006.03.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2005] [Revised: 03/06/2006] [Accepted: 03/12/2006] [Indexed: 11/30/2022]
Abstract
Emphysema is caused by exposure to cigarette smoking as well as alpha(1)-antitrypsin deficiency. It has been estimated to cost the National Health Service (NHS) in excess of 800 million pounds per year in related health care costs. The challenges for Critical Care nurses are those associated with dynamic hyperinflation, Auto-PEEP, malnutrition and the weaning from invasive and non-invasive mechanical ventilation. In this paper we consider the impact of the pathophysiology of emphysema, its effects on other body systems as well as the impact acute exacerbations have when patients are admitted to the Intensive Care Unit.
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Affiliation(s)
- Sue Mattison
- Bournemouth University, Christchurch Road, Bournemouth, United Kingdom
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26
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Anker SD, John M, Pedersen PU, Raguso C, Cicoira M, Dardai E, Laviano A, Ponikowski P, Schols AMWJ, Becker HF, Böhm M, Brunkhorst FM, Vogelmeier C. ESPEN Guidelines on Enteral Nutrition: Cardiology and Pulmonology. Clin Nutr 2006; 25:311-8. [PMID: 16697084 DOI: 10.1016/j.clnu.2006.01.017] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2006] [Accepted: 01/20/2006] [Indexed: 10/24/2022]
Abstract
These guidelines are intended to give evidence-based recommendations for the use of enteral nutrition (EN) in patients with chronic heart failure (CHF) and chronic obstructive pulmonary disease (COPD). They were developed by an interdisciplinary expert group in accordance with officially accepted standards and are based on all relevant publications since 1985. They have been discussed and accepted in a consensus conference. EN by means of oral nutritional supplements (ONS) or tube feeding (TF) enables nutritional intake to be maintained or increased when normal oral intake is inadequate. No data are yet available concerning the effects of EN on cachexia in CHF patients. However, EN is recommended to stop or reverse weight loss on the basis of physiological plausibility. In COPD patients, EN in combination with exercise and anabolic pharmacotherapy has the potential to improve nutritional status and function. Frequent small amounts of ONS are preferred in order to avoid postprandial dyspnoea and satiety as well as to improve compliance.
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Affiliation(s)
- S D Anker
- Division of Applied Cachexia Research, Department of Cardiology, Charité-Universitätsmedizin Berlin, CVK, Berlin, Germany.
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27
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Choe KH. Complications of Chronic Obstructive Pulmonary Disease. JOURNAL OF THE KOREAN MEDICAL ASSOCIATION 2006. [DOI: 10.5124/jkma.2006.49.4.321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Affiliation(s)
- Kang Hyeon Choe
- Department of Internal Medicine, Chungbuk National Univercity College of Medicine & Hospital, Korea.
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28
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Mallampalli A. Nutritional management of the patient with chronic obstructive pulmonary disease. Nutr Clin Pract 2005; 19:550-6. [PMID: 16215153 DOI: 10.1177/0115426504019006550] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
The prevalence and prognostic importance of malnutrition in chronic obstructive pulmonary disease (COPD), the factors that contribute to development of nutritional depletion, and the available evidence regarding effects of nutrition support in these patients are the subjects of this review. Nutritional depletion, as indicated by weight loss and loss of lean body mass, is a common complication of advanced COPD (particularly, but not limited to, the emphysematous type). Low body weight or recent weight loss and in particular depleted lean body mass in patients with COPD have been shown to be independent predictors of mortality, outcomes after acute exacerbations, hospital admission rates, and need for mechanical ventilation. The factors thought to contribute to nutritional depletion in these patients include elevated resting and activity-related energy expenditure, reduced dietary intake relative to resting energy expenditure, accelerated negative nitrogen balance, particularly during acute exacerbations of COPD, medication effects, and perhaps most importantly an elevated systemic inflammatory response. Studies to date suggest that, although it can help limit weight loss and negative energy balance in these patients, the effect of nutritional supplementation alone on clinically significant outcomes such as pulmonary function and exercise capacity is minimal. However, nutritional supplementation may have a role in the management of COPD when provided as part of an integrated rehabilitation program incorporating a structured exercise component as an anabolic stimulus.
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Affiliation(s)
- Antara Mallampalli
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, Baylor College of Medicine, Houston, Texas, USA.
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Planas M, Alvarez J, García-Peris PA, de la Cuerda C, de Lucas P, Castellà M, Canseco F, Reyes L. Nutritional support and quality of life in stable chronic obstructive pulmonary disease (COPD) patients. Clin Nutr 2005; 24:433-41. [PMID: 15896431 DOI: 10.1016/j.clnu.2005.01.005] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2004] [Accepted: 01/26/2005] [Indexed: 11/19/2022]
Abstract
RATIONALE Nutritional depletion is a common problem in chronic obstructive pulmonary disease (COPD) patients. It is caused, to a large extent, by an imbalance between low-energy intake and high-energy requirements. This problem adversely affects morbidity and mortality. However, the use of nutritional supplements to reach their energy necessities requires optimisation between positive and adverse effects on outcome before being used systematically as part of their comprehensive care. PURPOSE The aim of our study was to investigate the effects of oral nutritional repletion on quality of life in stable COPD patients. METHODS Prospective, randomised and multi-centre study. Stable COPD patients with a body mass index 22, a fat-free mass index 16, and/or a recent involuntary weight loss (5% during last month, or 10% during the last 3 months) were studied. Exclusion criteria were to present signs of an airway infection, to have a cardiovascular, neurological, or endocrine disease, to be treated with oral steroids, immunosuppressors or oxygen therapy at home, and to receive nutritional supplements. During 12 weeks, patients were encouraged to ingest a total daily defined energy intake. Randomly, in patients from group A the total daily energy load was Resting Energy Expenditure (REE)x1.7, and those from group B, REE x1.3. Total daily energy intake was achieved with regular food plus, if necessary, oral nutritional supplement rich in proteins (with 50% of whey protein), with predominance of carbohydrates over fat, and enriched in antioxidants. Primary end-point variable was quality of life. Secondary end-point outcomes included body weight, body composition, lung function, handgrip strength, and compliance with the energy intake previously planned. Data were treated with a SAS System. Student's test, Wilcoxon's rank sum test, and Mann-Whitney's test were used. RESULTS At baseline both groups of patients were comparable. All patients needed oral nutritional supplements to achieve total daily defined energy intake. After 12 weeks of follow-up, patients in both groups significantly increased energy intake. Patients in group A increased body weight (P=0.001), triceps skin fold thickness (P=0.009) and body fat mass (P=0.02), and decreased body fat-free mass index (P=0.02). In this group a marked increase in airflow limitation was observed. A tendency to increase body weight and handgrip strength, and to decrease airflow limitation was observed in patients from group B. Furthermore, patients in the later group showed a significant improvement in the feeling of control over the disease (P=0.007) and a tendency to better the other criteria in a quality of life scale. CONCLUSIONS According to our results, total daily energy intake of REE x 1.3 is preferable to REE x 1.7 in mild stable COPD patients. The administration of oral nutritional supplements, rich in proteins (with 50% of whey protein), with predominance of carbohydrates over fat, and enriched in antioxidants, to achieve total daily defined energy intake in patients in group B was followed by a significant improvement of one criteria (mastery) among many others in a quality of life scale.
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Affiliation(s)
- Mercé Planas
- Hospital Universitario Vall d'Hebron, Barcelona, Spain.
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30
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Ferreira IM, Brooks D, Lacasse Y, Goldstein RS, White J. Nutritional supplementation for stable chronic obstructive pulmonary disease. Cochrane Database Syst Rev 2005:CD000998. [PMID: 15846608 DOI: 10.1002/14651858.cd000998.pub2] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
BACKGROUND Low body weight in patients with chronic obstructive pulmonary disease (COPD) is associated with an impaired pulmonary status, reduced diaphragmatic mass, lower exercise capacity and higher mortality rate when compared to adequately nourished individuals with this disease. Nutritional support may therefore be a useful part of their comprehensive care. OBJECTIVES To conduct a systematic review of randomised controlled trials (RCTs) to clarify whether nutritional supplementation (caloric supplementation for at least 2 weeks) improved anthropometric measures, pulmonary function, respiratory muscle strength and functional exercise capacity in patients with stable COPD. SEARCH STRATEGY Randomized controlled trials (RCTs) were identified from the Cochrane Airways Group register of RCTs, a hand-search of abstracts presented at international meetings and consultation with experts. Searches are current as of March 2004. SELECTION CRITERIA Two reviewers independently selected trials for inclusion, assessed quality and extracted the data. DATA COLLECTION AND ANALYSIS Within each trial and for each outcome, we calculated an effect size. The effect sizes were then pooled by a random-effects model. Homogeneity among the effect sizes was also tested. MAIN RESULTS Eleven studies recruiting 352 participants met the inclusion criteria. Eight papers were considered as high quality. Two studies were double-blinded. For each of the outcomes studied, the effect of nutritional support was small: the 95% confidence intervals around the pooled effect sizes all included zero. The effect of nutritional support was homogeneous across studies. AUTHORS' CONCLUSIONS Nutritional support had no significant effect on anthropometric measures, lung function or exercise capacity in patients with stable COPD.
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Affiliation(s)
- I M Ferreira
- St Catherines, Ontario, 76 Roehampton Avenue, Canada, L2M 7W5.
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31
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Ferreira IM. Nutrition in Stable Chronic Obstructive Pulmonary Disease. Clin Nutr 2005. [DOI: 10.1016/b978-0-7216-0379-7.50040-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Oey IF, Bal S, Spyt TJ, Morgan MDL, Waller DA. The increase in body mass index observed after lung volume reduction may act as surrogate marker of improved health status. Respir Med 2004; 98:247-53. [PMID: 15002761 DOI: 10.1016/j.rmed.2003.09.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
OBJECTIVE To assess the effects of lung volume reduction surgery (LVRS) on body mass index (BMI). METHODS Prospective data was collected on a series of 63 patients undergoing LVRS (bilateral in 22 patients, unilateral in 41 patients). Median age was 58 (41-70) years. The peri-operative effects of LVRS on BMI, lung function and health status (assessed by SF 36 questionnaire) were recorded at 3, 6, 12 and 24 months. RESULTS We found an overall increase in BMI after LVRS, which was significant up to 2 years. These changes correlated with the changes in FEV1 (R = 0.3, P < 0.01 6 months after LVRS) and diffusing capacity for carbon monoxide (DLCO) (R = 0.5, P < 0.01 6 months after LVRS). At 6 months, when the best results in health status were found, the patients were divided in a responders group (improved SF 36 score) and a non-responders group (same or worse SF 36 score) for each of the 8 domains of the SF 36. In 6 domains the non-responders showed no increase in BMI. In 6 domains the responders showed a significant increase in BMI. CONCLUSION LVRS significantly improves postoperative BMI, which correlates with improvements in DLCO and reflects changes in health status.
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Affiliation(s)
- Inger F Oey
- Department of Respiratory Medicine and Thoracic Surgery, Glenfield Hospital, Leicester LE3 9QP, UK.
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Steiner MC, Barton RL, Singh SJ, Morgan MDL. Nutritional enhancement of exercise performance in chronic obstructive pulmonary disease: a randomised controlled trial. Thorax 2003; 58:745-51. [PMID: 12947128 PMCID: PMC1746806 DOI: 10.1136/thorax.58.9.745] [Citation(s) in RCA: 104] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND Pulmonary rehabilitation is effective in improving exercise performance and health status in chronic obstructive pulmonary disease (COPD). However, the role of nutritional support in the enhancement of the benefits of exercise training has not been explored. A double blind, randomised, controlled trial of carbohydrate supplementation was undertaken in patients attending outpatient pulmonary rehabilitation. METHODS 85 patients with COPD were randomised to receive a 570 kcal carbohydrate rich supplement or a non-nutritive placebo daily for the duration of a 7 week outpatient pulmonary rehabilitation programme. Primary outcome measures were peak and submaximal exercise performance using the shuttle walk tests. Changes in health status, body composition, muscle strength, and dietary macronutrient intake were also measured. RESULTS Patients in both the supplement and placebo groups increased shuttle walking performance and health status significantly. There was no statistically significant difference between treatment groups in these outcomes. Patients receiving placebo lost weight whereas supplemented patients gained weight. In well nourished patients (BMI >19 kg/m(2)) improvement in incremental shuttle performance was significantly greater in the supplemented group (mean difference between groups: 27 (95% CI 1 to 53) m, p<0.05). Increases in incremental shuttle performance correlated with increases in total carbohydrate intake. CONCLUSIONS When universally prescribed, carbohydrate supplementation does not enhance the rehabilitation of patients with COPD. This study suggests that exercise training results in negative energy balance that can be overcome by supplementation and that, in selected patients, this may improve the outcome of training. The finding of benefit in well nourished patients may suggest a role for nutritional supplementation beyond the treatment of weight loss in COPD.
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Affiliation(s)
- M C Steiner
- Institute for Lung Health, Department of Respiratory Medicine, Glenfield Hospital, Leicester LE3 9QP, UK.
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Ferreira IM. Chronic obstructive pulmonary disease and malnutrition: why are we not winning this battle? ACTA ACUST UNITED AC 2003. [DOI: 10.1590/s0102-35862003000200011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVES: To review the mechanisms involved in the origin of malnutrition in patients with chronic obstructive pulmonary disease (COPD), and to make a systematic review of randomized controlled studies, to clarify the contribution of nutritional supplementation in patients with stable COPD. METHOD: A systematic review of articles published in the field of nutrition, in any language and from several sources, including Medline, Embase, Cinahl, and the Cochrane Registry on COPD, as well as studies presented at congresses in the US and Europe. RESULTS: Studies on nutritional supplementation for more than two weeks showed a very small effect, not reaching statistical significance. A linear regression study found that old age, relative anorexia, and high inflammatory response are associated with non-response to nutritional therapy. CONCLUSION: Currently, there is no evidence that nutritional supplementation is truly effective in patients with COPD. Factors associated with non-response suggest a relationship with the degree of inflammation, including high TNF-alpha levels. Measuring inflammation markers may be useful to determine prognosis and adequate therapy. Treatment with anti-inflammatory cytokines or cytokine inhibitors seems promising for the future.
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Creutzberg EC, Wouters EFM, Mostert R, Weling-Scheepers CAPM, Schols AMWJ. Efficacy of nutritional supplementation therapy in depleted patients with chronic obstructive pulmonary disease. Nutrition 2003; 19:120-7. [PMID: 12591542 DOI: 10.1016/s0899-9007(02)00841-9] [Citation(s) in RCA: 140] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
OBJECTIVE Weight loss and muscle wasting adversely affect morbidity and mortality in patients with chronic obstructive pulmonary disease (COPD). Maintenance systemic glucocorticosteroids, prescribed in a substantial number of patients, further contribute to muscle weakness. We investigated the efficacy of oral nutritional supplementation therapy in depleted patients with COPD. METHODS The therapy consisted of daily two to three oral liquid nutritional supplements (mean +/- standard deviation: 2812 +/- 523 kJ/24 h) incorporated into an 8-wk inpatient pulmonary rehabilitation program in 64 (49 men) depleted patients with COPD. Endpoints were body weight, fat-free mass by bioelectrical impedance analysis, respiratory and peripheral muscle function (maximal inspiratory mouth pressure and handgrip strength, respectively), exercise performance (incremental bicycle ergometry), and disease-specific health status by St. George's Respiratory Questionnaire. Forty-eight percent of the patients were treated with low-dose oral glucocorticosteroids as maintenance medication (dose equivalent to 7.6 +/- 2.5 mg of methylprednisolone per day). RESULTS Increases in body weight (2.1 +/- 2.1 kg, P < 0.001) and fat-free mass (1.1 +/- 2.0 kg, P < 0.001) were seen. Further, maximal inspiratory mouth pressure (4 +/- 10 cm of H(2)O, P = 0.001), handgrip strength (1.2 +/- 3.1 kg, P = 0.004), and peak workload (7 +/- 11 W, P = 0.001) significantly improved. Clinically significant improvements in the items symptoms (9 +/- 16 points, P < 0.001) and impact (4 +/- 15 points, P = 0.043) of St. George's Respiratory Questionnaire were achieved. Oral glucocorticosteroid treatment significantly impaired the response to nutritional supplementation therapy with respect to maximal inspiratory mouth pressure, peak workload, and St. George's Respiratory Questionnaire symptom score. CONCLUSIONS Nutritional supplementation therapy implemented in a pulmonary rehabilitation program was effective in depleted patients with COPD. However, oral glucocorticosteroid treatment attenuated the anabolic response to nutritional supplementation.
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Affiliation(s)
- Eva C Creutzberg
- Department of Pulmonology, University Hospital Maastricht, Maastricht, The Netherlands.
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Abstract
Patients with asthma and allergic rhinitis may benefit from hydration and a diet low in sodium, omega-6 fatty acids, and transfatty acids, but high in omega-3 fatty acids (i.e., fish, almonds, walnuts, pumpkin, and flax seeds), onions, and fruits and vegetables (at least five servings a day). Physicians may need to be more cautious when prescribing antibiotics to children in their first year of life when they are born to families with a history of atopy. More research is needed to establish whether supplementation with probiotics (lactobacillus and bifidobacterium) during the first year of life or after antibiotic use decreases the risk of developing asthma and allergic rhinitis. Despite a theoretic basis for the use of vitamin C supplements in asthmatic patients, the evidence is still equivocal, and long-term studies are needed. The evidence is stronger for exercise-induced asthma, in which the use of vitamin C supplementation at a dosage of 1 to 2 g per day may be helpful. It is also possible that fish oil supplements, administered in a dosage of 1 to 1.2 g of EPA and DHA per day, also may be helpful to some patients with asthma. Long-term studies of fish oil and vitamin C are needed for more definite answers. For the patient interested in incorporating nutritional approaches, vitamin C and fish oils have a safe profile. However, aspirin-sensitive individuals should avoid fish oils, and red blood cell magnesium levels may help in making the decision whether to use additional magnesium supplements. Combination herbal formulas should be used in the treatment of asthma with medical supervision and in collaboration with an experienced herbalist or practitioner of TCM. Safe herbs, such as Boswellia and gingko, may be used singly as adjuncts to a comprehensive plan of care if the patient and practitioner have an interest in trying them while staying alert for drug-herb interactions. No data on the long-term use of these single herbs in asthma exist. For the motivated patient, mind-body interventions such as yoga, hypnosis, and biofeedback-assisted relaxation and breathing exercises are beneficial for stress reduction in general and may be helpful in further controlling asthma. Encouraging parents to learn how to massage their asthmatic children may appeal to some parents and provide benefits for parents and children alike. Acupuncture and chiropractic treatment cannot be recommended at this time, although some patients may derive benefit because of the placebo effect. For patients with allergic rhinitis, there are no good clinical research data on the use of quercetin and vitamin C. Similarly, freeze-dried stinging nettle leaves may be tried, but the applicable research evidence also is poor. Further studies are needed to assess the efficacy of these supplements and herbs. Homeopathic remedies based on extreme dilutions of the allergen may be beneficial in allergic rhinitis but require collaboration with an experienced homeopath. There are no research data on constitutional homeopathic approaches to asthma and allergic rhinitis. Patients with COPD are helped by exercise, pulmonary rehabilitation, and increased caloric protein and fat intake. Vitamin C and n-3 supplements are safe and reasonable; however, studies are needed to establish their efficacy in COPD. On the other hand, there are convincing data in favor of N-acetyl-cysteine supplementation for the patient with COPD at doses ranging between 400 and 1200 mg daily. Red blood cell magnesium levels may guide the use of magnesium replacement. The use of L-carnitine and coenzyme Q10 in patients with COPD needs further study. The addition of essential oils to the dietary regimen of patients with chronic bronchitis is worth exploring. Patients with upper respiratory tract infections can expect a shorter duration of symptoms by taking high doses of vitamin C (2 g) with zinc supplements, preferably the nasal zinc gel, at the onset of their symptoms. Adding an herb such as echinacea or Andrographis shortens the duration of the common cold. The one study on Elderberry's use for the flu was encouraging, and the data on the homeopathic remedy Oscillococcinum interesting, but more studies should be performed. Saline washes may be helpful to patients with allergic rhinitis and chronic sinusitis. Patients also may try the German combination (available in the United States) of elderberry, vervain, gentian, primrose, and sorrel that has been tested in randomized clinical trials. Bromelain is safe to try; the trials of bromelain supplementation were promising but were never repeated. The preceding suggestions need to be grounded in a program based on optimal medical management. Patients need to be well educated in the proper medical management of their disease and skilled at monitoring disease stability and progress. Asthmatic patients need to monitor their bronchodilator usage and peak flow meter measurements to step up their medical treatment in a timely manner, if needed. Patients welcome physician guidance when exploring the breadth of treatments available today. A true patient-physician partnership is always empowering to patients who are serious about regaining their function and health.
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Affiliation(s)
- Raja Jaber
- Division of Wellness and Chronic Illness, Department of Family Medicine, University Hospital and Medical Center, Health Sciences Center, State University of New York at Stony Brook, Stony Brook, NY 11794-8461, USA.
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Ferreira IM, Brooks D, Lacasse Y, Goldstein RS, White J. Nutritional supplementation for stable chronic obstructive pulmonary disease. Cochrane Database Syst Rev 2002:CD000998. [PMID: 11869582 DOI: 10.1002/14651858.cd000998] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Low body weight in patients with chronic obstructive pulmonary disease (COPD) is associated with an impaired pulmonary status, reduced diaphragmatic mass, lower exercise capacity and higher mortality rate when compared to adequately nourished individuals with this disease. Nutritional support may therefore be a useful part of their comprehensive care. OBJECTIVES To conduct a systematic review of randomized controlled trials (RCTs) to clarify whether nutritional supplementation (caloric supplementation for at least 2 weeks) improved anthropometric measures, pulmonary function, respiratory muscle strength and functional exercise capacity in patients with stable COPD. SEARCH STRATEGY Randomized controlled trials (RCTs) were identified from the Cochrane Airways Group register of RCTs, a hand-search of abstracts presented at international meetings and consultation with experts. SELECTION CRITERIA Two reviewers independently selected trials for inclusion, assessed quality and extracted the data. DATA COLLECTION AND ANALYSIS Within each trial and for each outcome, we calculated an effect size. The effect sizes were then pooled by a random-effects model. Homogeneity among the effect sizes was also tested. MAIN RESULTS From 272 references, nine RCTs were ultimately included. Six papers were considered as high quality and only two studies were double-blinded. For each of the outcomes studied, the effect of nutritional support was small: the 95% confidence intervals around the pooled effect sizes all included zero. The effect of nutritional support was homogeneous across studies. An additional search conducted in August 2001 did not identify further studies. REVIEWER'S CONCLUSIONS Nutritional support had no significant effect on anthropometric measures, lung function or exercise capacity in patients with stable COPD.
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Affiliation(s)
- I M Ferreira
- Respiratory Division, University of Toronto, 82 Buttonwood, Toronto, Ontario, Canada, M6M 2J5.
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Ferreira I, Brooks D, Lacasse Y, Goldstein R. Nutritional intervention in COPD: a systematic overview. Chest 2001; 119:353-63. [PMID: 11171709 DOI: 10.1378/chest.119.2.353] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
OBJECTIVE We conducted a systematic overview of randomized controlled trials (RCTs) to clarify the contribution of nutritional supplementation for patients with stable COPD. METHODS RCTs were identified from several sources, including the Cochrane Airways Group register of RCTs, a hand search of abstracts presented at international meetings, and consultation with experts. Two reviewers independently selected trials for inclusion, assessed quality, and extracted the data. RESULTS Twenty-one reports were classified according to the type, duration of supplementation, and the presence of anabolic substances. High carbohydrate meals were associated with an increase in carbon dioxide production and a decrease in exercise capacity. Short-term crossover studies in which diets of various compositions were administered supported the notion that high carbohydrate loads increase the stress on the ventilatory system. The influence of longer-term supplementation (> 2 weeks) on weight, anthropometry, and exercise capacity varied, without there being a consistent effect. Lean body weight was only occasionally reported and health-related quality of life too rarely to be included as an outcome. The influence of recombinant human growth hormone was disappointing. Anabolic steroids increased body weight and lean body mass, but had little influence on exercise capacity. CONCLUSION This systematic overview in patients with COPD supports the notion that those with marginal ventilatory reserve might benefit from a dietary regimen in which a high percentage of calories are supplied by fat. Although there are reports of the benefits of nutritional repletion, trials of > 2 weeks failed to show consistent benefit on body weight. Evaluating nutritional repletion is hampered by the absence of information regarding body composition, exercise, and health-related quality of life. Growth hormone has not been shown to be useful. Further studies are needed to refine the beneficial effects of anabolic steroids as adjunctive agents together with nutritional support and exercise.
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Affiliation(s)
- I Ferreira
- Departments of Medicine, the University of Toronto and Respiratory Medicine, West Park Hospital, Toronto, Ontario, Canada.
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Vermeeren MA, Wouters EF, Nelissen LH, van Lier A, Hofman Z, Schols AM. Acute effects of different nutritional supplements on symptoms and functional capacity in patients with chronic obstructive pulmonary disease. Am J Clin Nutr 2001; 73:295-301. [PMID: 11157327 DOI: 10.1093/ajcn/73.2.295] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Use of nutritional supplements in depleted patients with chronic obstructive pulmonary disease (COPD) requires optimization between positive effects on outcome and potential acute adverse effects on metabolism and exercise performance. OBJECTIVE The aim of this study was to investigate the acute effects of nutritional supplements on metabolism and exercise capacity in stable COPD patients. DESIGN In part 1, the effects of 3 different energy loads (placebo, 1046 kJ, and 2092 kJ) with a normal distribution of macronutrients were investigated in 14 COPD patients. In part 2, the effects of a fat-rich compared with a carbohydrate-rich supplement (both 1046 kJ) were studied in 11 COPD patients. The study was performed in a randomized, double-blind, crossover fashion. Metabolic and ventilatory variables were measured postprandially and during a submaximal cycle endurance exercise test. RESULTS Overall, no immediate negative effects of the supplements were found in part 1. A slight but significant postprandial increase in respiratory quotient was found after the 1046-kJ and 2092-kJ supplements compared with placebo. There was no significant difference in metabolism or exercise capacity after a fat-rich or carbohydrate-rich supplement. Surprisingly, the change in shortness of breath (postprandial compared with preprandial) was significantly greater after the fat-rich supplement. CONCLUSIONS An energy load up to 2092 kJ had no adverse immediate effect in COPD patients compared with placebo. The subjects who consumed the fat-rich supplement experienced more shortness of breath than did the subjects who consumed the carbohydrate-rich supplement.
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Affiliation(s)
- M A Vermeeren
- Department of Pulmonology, University Hospital Maastricht, The Netherlands.
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Affiliation(s)
- M C Steiner
- Institute For Lung Health, Department of Respiratory Medicine, Glenfield Hospital, Leicester LE3 9QP, UK
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Ferreira IM, Brooks D, Lacasse Y, Goldstein RS. Nutritional support for individuals with COPD: a meta-analysis. Chest 2000; 117:672-8. [PMID: 10712990 DOI: 10.1378/chest.117.3.672] [Citation(s) in RCA: 114] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
RATIONALE Malnutrition in patients with COPD is associated with an impaired pulmonary status, reduced diaphragmatic mass, lower exercise capacity, and higher mortality rate when compared to adequately nourished individuals with COPD. Nutritional support may therefore be a useful part of their comprehensive care. PURPOSE To conduct a meta-analysis of randomized controlled trials (RCTs) to clarify whether nutritional supplementation (caloric supplementation for at least 2 weeks) improved anthropometric measures, pulmonary function, respiratory muscle strength, and functional exercise capacity in patients with stable COPD. METHODS RCTs were identified from several sources, including the Cochrane Airways Group register of RCTs, a hand search of abstracts presented at international meetings, and consultation with experts. Two reviewers independently selected trials for inclusion, assessed quality, and extracted the data. Within each trial and for each outcome, we calculated an effect size. The effect sizes were then pooled by a random-effects model. Homogeneity among the effect sizes was also tested. RESULTS From 272 references, nine RCTs were ultimately included. Six articles were considered as high quality. Only two studies were double blinded. For each of the outcomes studied, the effect of nutritional support was small: the 95% confidence intervals around the pooled effect sizes all included zero. The effect of nutritional support was homogeneous across studies. CONCLUSION Nutritional support had no effect on improving anthropometric measures, lung function, or functional exercise capacity among patients with stable COPD.
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Affiliation(s)
- I M Ferreira
- Respitratory Medicine Program, West Park Hospital, Toronto, Canada.
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Schols A, Wouters E. Prise en charge nutritionnelle et effets respiratoires des apports nutritionnels chez l'insuffisant respiratoire chronique. NUTR CLIN METAB 1998. [DOI: 10.1016/s0985-0562(98)80031-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Affiliation(s)
- A M Schols
- Department of Pulmonology, Maastricht University, The Netherlands
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Akrabawi SS, Mobarhan S, Stoltz RR, Ferguson PW. Gastric emptying, pulmonary function, gas exchange, and respiratory quotient after feeding a moderate versus high fat enteral formula meal in chronic obstructive pulmonary disease patients. Nutrition 1996; 12:260-5. [PMID: 8862532 DOI: 10.1016/s0899-9007(96)90853-9] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
High fat enteral formulas have been advocated for the nutritional support of chronic obstructive pulmonary disease (COPD) patients because dietary fat utilization under ideal conditions produces less CO2 per O2 consumed than carbohydrate. No data exist for these patients comparing the effects of a moderate fat vs. a high fat enteral formula on gastric emptying times (GE) and subsequent CO2 production (VCO2), oxygen consumption (VO2), respiratory quotient (RQ), and pulmonary function. Our double-blind crossover study compared these parameters after feeding a 355 mL (530 kcal) meal with either 41% fat calories (Respalor) or 55% fat calories (Pulmocare). Thirty-six COPD outpatients with a forced expiratory volume in 1 s (FEV1) < 60% of predicted were studied after an overnight fast. Gastric emptying half-time (GE t1/2) was measured using the 99MTc-radionuclide technique; VCO2, VO2, RQ, and other pulmonary functions were measured at 0, 30, 90, and 150 min postprandial using the Canopy Mode of the Deltatrac Metabolic Monitor and the Renaissance Spirometry System. We observed a significantly (p = 0.0001) longer GE t1/2 of the high fat meal when compared to the moderate fat meal (134.1 vs. 108.6 min) At 30 and 90, but not at 150 min postprandial, the VCO2 and VO2 for patients fed the moderate-fat formula were significantly (p = 0.05) higher than for those fed the high-fat formula; no differences were observed for the other pulmonary functions. Although RQ increased significantly (p = 0.01) after both meals, no differences between formulas were noted at all postprandial times tested. Compared to the high-fat meal, the moderate-fat meal significantly enhanced gastric emptying. The earlier rise in VCO2 and VO2 after the moderate-fat meal did not impact pulmonary function and reflected the earlier utilization of the moderate-fat meal. The fact that RQ was not different between the two meals at all postprandial times tested suggest that the higher rise in VCO2 and VO2 after the moderate-fat meal was most likely due to earlier gastric emptying of the moderate-fat meal rather than the difference of the fat-to-carbohydrate ratio between the two tested meals. The impact of these findings on long-term management of COPD patients awaits long-term prospective studies.
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Affiliation(s)
- S S Akrabawi
- Department of Nutrition Research (R-9), Mead Johnson Nutritional Group, Evansville, Indiana 47721-001, USA
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Schols AM, Wouters EF. Nutritional considerations in the treatment of chronic obstructive pulmonary disease. Clin Nutr 1995; 14:64-73. [PMID: 16843903 DOI: 10.1016/s0261-5614(95)80025-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/1994] [Accepted: 12/12/1994] [Indexed: 10/26/2022]
Affiliation(s)
- A M Schols
- Department of Pulmonology, University Hospital Maastricht, P.O. Box 5800, 6202 AZ Maastricht, The Netherlands
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