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Douglas AJM, Talbot JS, Perkins D, Dawkins TG, Oliver JL, Lloyd RS, Ainslie PN, McManus A, Pugh CJA, Lord RN, Stembridge M. The influence of maturation and sex on intracranial blood velocities during exercise in children. J Appl Physiol (1985) 2024; 136:451-459. [PMID: 38126090 PMCID: PMC11212810 DOI: 10.1152/japplphysiol.00478.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 12/15/2023] [Accepted: 12/15/2023] [Indexed: 12/23/2023] Open
Abstract
Cerebral blood velocity (CBv) increases in response to moderate exercise in humans, but the magnitude of change is smaller in children compared with postpubertal adolescents and adults. Whether sex differences exist in the anterior or posterior CBv response to exercise across pubertal development remains to be determined. We assessed middle cerebral artery (MCAv) and posterior cerebral artery (PCAv) blood velocity via transcranial Doppler in 38 prepubertal (18 males) and 48 postpubertal (23 males) with cerebrovascular and cardiorespiratory measures compared at baseline and ventilatory threshold. At baseline, MCAv was higher in both sexes pre- versus postpuberty. Females demonstrated a greater MCAv (P < 0.001) than their male counterparts (prepubertal females; 78 ± 11 cm·s-1 vs. prepubertal males; 72 ± 8 cm·s-1, and postpubertal females; 68 ± 10 cm·s-1 vs. postpubertal males; 62 ± 7 cm·s-1). During exercise, MCAv remained higher in postpubertal females versus males (81 ± 15 cm·s-1 vs. 73 ± 11 cm·s-1), but there were no differences in prepuberty. The relative increase in PCAv was greater in post- versus prepubertal females (51 ± 9 cm·s-1 vs. 45 ± 11 cm·s-1; P = 0.032) but was similar in males and females. Our findings suggest that biological sex alters anterior cerebral blood velocities at rest in both pre- and postpubertal youth, but the response to submaximal exercise is only influenced by sex postpuberty.NEW & NOTEWORTHY Cerebral blood velocity (CBv) in the anterior circulation was higher in females compared with males irrespective of maturational stage, but not in the posterior circulation. In response to exercise, females demonstrated a greater CBv compared with males, especially post-peak height velocity (post-PHV) where the CBv response to exercise was more pronounced. Our findings suggest that both CBv at rest and in response to acute submaximal exercise are altered by biological sex in a maturity-dependent manner.
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Affiliation(s)
- Andrew J M Douglas
- Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, United Kingdom
- Centre for Health, Activity and Wellbeing Research, Cardiff Metropolitan University, Cardiff, United Kingdom
| | - Jack S Talbot
- Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, United Kingdom
- Centre for Health, Activity and Wellbeing Research, Cardiff Metropolitan University, Cardiff, United Kingdom
| | - Dean Perkins
- Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, United Kingdom
- Department of Sport Science, University of Innsbruck, Innsbruck, Austria
| | - Tony G Dawkins
- Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, United Kingdom
- Centre for Heart, Lung, and Vascular Health, School of Health and Exercise Sciences, University of British Columbia, Kelowna, British Columbia, Canada
| | - Jon L Oliver
- Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, United Kingdom
- Youth Physical Development Centre, Cardiff Metropolitan University, Cardiff, United Kingdom
- Sports Performance Research Institute New Zealandy, AUT University, Auckland, New Zealand
| | - Rhodri S Lloyd
- Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, United Kingdom
- Youth Physical Development Centre, Cardiff Metropolitan University, Cardiff, United Kingdom
- Sports Performance Research Institute New Zealandy, AUT University, Auckland, New Zealand
- Centre for Sport Science and Human Performance, Waikato Institute of Technology, Waikato, New Zealand
| | - Philip N Ainslie
- Centre for Heart, Lung, and Vascular Health, School of Health and Exercise Sciences, University of British Columbia, Kelowna, British Columbia, Canada
| | - Ali McManus
- Centre for Heart, Lung, and Vascular Health, School of Health and Exercise Sciences, University of British Columbia, Kelowna, British Columbia, Canada
| | - Christopher J A Pugh
- Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, United Kingdom
- Centre for Health, Activity and Wellbeing Research, Cardiff Metropolitan University, Cardiff, United Kingdom
| | - Rachel N Lord
- Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, United Kingdom
- Centre for Health, Activity and Wellbeing Research, Cardiff Metropolitan University, Cardiff, United Kingdom
| | - Mike Stembridge
- Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, United Kingdom
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Yang SC, Lee CW. Physiological effects of N95 respirators on rescuers during cardiopulmonary resuscitation. Heliyon 2023; 9:e18970. [PMID: 37600379 PMCID: PMC10432712 DOI: 10.1016/j.heliyon.2023.e18970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 07/14/2023] [Accepted: 08/03/2023] [Indexed: 08/22/2023] Open
Abstract
Objectives There is a lack of evidence in the medical literature reporting the physiological stress imposed by the wearing of N95 respirators during cardiopulmonary resuscitation (CPR) in healthcare providers. The aim of this study is to monitor the changes in hemodynamics and blood gas profiles in rescuers during the performance of CPR while wearing N95 respirators. Methods Thirty-two healthy healthcare workers performed standard CPR on manikins, each participant conducted 2 min of chest compression followed by 2 min of rest for 3 cycles. A non-invasive blood gas measuring device via a fingertip detector was used to collect arterial blood gas and hemodynamic data. Student t-test was used for comparison of various physiologic parameters before and after each session of chest compression. Results There were no significant differences in arterial blood gas profiles including partial pressure of arterial carbon dioxide and partial pressure of arterial oxygen before and after each session of chest compression (p > 0.05 for all). Heart rate and cardiac output were significantly higher after CPR (p < 0.05 for all), but no significant changes were found on blood pressure. Conclusions Our data suggest that healthcare providers wearing N95 respirators during provision of CPR in a short period of time does not cause any significant abnormalities in blood gas profiles and blood pressure. This may provide evidence to reassure the safe use of N95 respirator during performance of CPR.
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Affiliation(s)
- Shih-Chia Yang
- Department of Emergency Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chi-Wei Lee
- Institute of Medical Science and Technology, National Sun Yat-Sen University, Kaohsiung, Taiwan
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Han JG, Park H, Yang JS, Kim JS, Park B, Park DY, Kim HJ. Verification for Diagnosis of Sleep-Related Hypoventilation and Carbon Dioxide Partial Pressure During Sleep in Children Using End-Tidal Carbon Dioxide. SLEEP MEDICINE RESEARCH 2022. [DOI: 10.17241/smr.2022.01277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Background and Objective From the past, several researchers have studied and measured the partial pressure of carbon dioxide during sleep in normal children to establish diagnostic criteria for hypoventilation in children. Here we tried to verify the existing definition of sleep-related hypoventilation in Asian by evaluating and analyzing the carbon dioxide partial pressure in pediatric subjects who underwent polysomnography.Methods We retrospectively analyzed clinical information of 196 children who underwent polysomnography at our hospital from Feb 2011 to Apr 2021. Among Asian pediatric subjects, those with serious chronic or genetic diseases, craniofacial deformities, and hypoventilation confirmed by polysomnography were excluded. We evaluated partial pressure of carbon dioxide in target group by end-tidal carbon dioxide (EtCO2) measured with a stream capnometer through nasal cannula. The target group was classified by apnea-hypopnea index and analyzed.Results The mean value of the time with EtCO<sub>2</sub> ≥ 45 mm Hg in total sleep time was 47.00% which is higher than previous studies. The mean value of the time with EtCO<sub>2</sub> ≥ 50 mm Hg in total sleep time was 2.77% which is similar to previous studies. Also, our subjects showed the highest mean EtCO<sub>2</sub> value in non-rapid eye movement (NREM) stage and lowest mean EtCO<sub>2</sub> value when wake.Conclusions In this study, the diagnostic criteria for sleep-related hypoventilation at the American Academy of Sleep Medicine (AASM) in 2017 established by measuring the EtCO<sub>2</sub> in western children seems appropriate to apply to Asian children to define hypoventilation.
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Klingshirn H, Schwarz SB. [Quality of Care in Home Mechanical Ventilation]. Pneumologie 2022; 76:397-403. [PMID: 35588747 DOI: 10.1055/a-1803-2168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Home mechanical ventilation has developed rapidly over the last 20 years. Today's most common positive pressure ventilation can be performed either non-invasively via face masks or invasively via endotracheal intubation or tracheal cannula. Non-invasive ventilation (NIV) in particular has gained in importance in recent years as positive evidence for a variety of indications for home mechanical ventilation has become increasingly available. In order to ensure a high quality of treatment for the steadily increasing number of patients, specific guidelines for different patient groups have been developed and regularly updated. The appropriate care structures for these partly multimorbid patient cohorts are strongly discussed, since the capacity limits of the existing care structure are reached by the rapid development in home mechanical ventilation. This development shows, that a critical evaluation of the existing care structures is necessary in order to develop a patient-centered, customized and resource-saving healthcare structure on the basis of the existing structures and taking into account the national characteristics of the German healthcare system.
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Affiliation(s)
- Hanna Klingshirn
- Katholische Stiftungshochschule München, University of Applied Sciences, München
| | - Sarah B Schwarz
- Lungenklinik Köln-Merheim, Kliniken der Stadt Köln gGmbH, Medizinische Fakultät, Universität Witten/Herdecke
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Umeda A, Ishizaka M, Ikeda A, Miyagawa K, Mochida A, Takeda H, Takeda K, Fukushi I, Okada Y, Gozal D. Recent Insights into the Measurement of Carbon Dioxide Concentrations for Clinical Practice in Respiratory Medicine. SENSORS (BASEL, SWITZERLAND) 2021; 21:5636. [PMID: 34451079 PMCID: PMC8402333 DOI: 10.3390/s21165636] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Revised: 08/06/2021] [Accepted: 08/16/2021] [Indexed: 12/28/2022]
Abstract
In the field of respiratory clinical practice, the importance of measuring carbon dioxide (CO2) concentrations cannot be overemphasized. Within the body, assessment of the arterial partial pressure of CO2 (PaCO2) has been the gold standard for many decades. Non-invasive assessments are usually predicated on the measurement of CO2 concentrations in the air, usually using an infrared analyzer, and these data are clearly important regarding climate changes as well as regulations of air quality in buildings to ascertain adequate ventilation. Measurements of CO2 production with oxygen consumption yield important indices such as the respiratory quotient and estimates of energy expenditure, which may be used for further investigation in the various fields of metabolism, obesity, sleep disorders, and lifestyle-related issues. Measures of PaCO2 are nowadays performed using the Severinghaus electrode in arterial blood or in arterialized capillary blood, while the same electrode system has been modified to enable relatively accurate non-invasive monitoring of the transcutaneous partial pressure of CO2 (PtcCO2). PtcCO2 monitoring during sleep can be helpful for evaluating sleep apnea syndrome, particularly in children. End-tidal PCO2 is inferior to PtcCO2 as far as accuracy, but it provides breath-by-breath estimates of respiratory gas exchange, while PtcCO2 reflects temporal trends in alveolar ventilation. The frequency of monitoring end-tidal PCO2 has markedly increased in light of its multiple applications (e.g., verify endotracheal intubation, anesthesia or mechanical ventilation, exercise testing, respiratory patterning during sleep, etc.).
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Affiliation(s)
- Akira Umeda
- Department of General Medicine, School of Medicine, IUHW Shioya Hospital, International University of Health and Welfare (IUHW), Yaita 329-2145, Japan
| | - Masahiro Ishizaka
- Department of Physical Therapy, School of Health Science, International University of Health and Welfare, Otawara 324-8501, Japan
| | - Akane Ikeda
- Department of Rehabilitation, IUHW Shioya Hospital, International University of Health and Welfare (IUHW), Yaita 329-2145, Japan
| | - Kazuya Miyagawa
- Department of Pharmacology, School of Pharmacy, International University of Health and Welfare, Otawara 324-8501, Japan
| | - Atsumi Mochida
- Department of Pharmacology, School of Pharmacy, International University of Health and Welfare, Otawara 324-8501, Japan
| | - Hiroshi Takeda
- Department of Pharmacology, School of Pharmacy, International University of Health and Welfare, Otawara 324-8501, Japan
- Department of Pharmacology, School of Pharmacy at Fukuoka, International University of Health and Welfare, Okawa 831-8501, Japan
| | - Kotaro Takeda
- Faculty of Rehabilitation, School of Healthcare, Fujita Health University, Toyoake 470-1192, Japan
| | - Isato Fukushi
- Faculty of Health Sciences, Uekusa Gakuen University, Chiba 264-0007, Japan
- Laboratory of Electrophysiology, Clinical Research Center, Murayama Medical Center, Musashimurayama 208-0011, Japan
| | - Yasumasa Okada
- Laboratory of Electrophysiology, Clinical Research Center, Murayama Medical Center, Musashimurayama 208-0011, Japan
| | - David Gozal
- Department of Child Health and the Child Health Research Institute, MU Women's and Children's Hospital, University of Missouri, Columbia, MO 65201, USA
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Strohleit D, Galetin T, Kosse N, Lopez-Pastorini A, Stoelben E. Guidelines on analgosedation, monitoring, and recovery time for flexible bronchoscopy: a systematic review. BMC Pulm Med 2021; 21:198. [PMID: 34112130 PMCID: PMC8193886 DOI: 10.1186/s12890-021-01532-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 05/10/2021] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Patients undergoing bronchoscopy in spontaneous breathing are prone to hypoxaemia and hypercapnia. Sedation, airway obstruction, and lung diseases impair respiration and gas exchange. The restitution of normal respiration takes place in the recovery room. Nonetheless, there is no evidence on the necessary observation time. We systematically reviewed current guidelines on bronchoscopy regarding sedation, monitoring and recovery. METHODS This review was registered at the PROSPERO database (CRD42020197476). MEDLINE and awmf.org were double-searched for official guidelines, recommendation or consensus statements on bronchoscopy from 2010 to 2020. The PICO-process focussed on adults (Patients), bronchoscopy with maintained spontaneous breathing (Interventions), and recommendations regarding the intra- and postprocedural monitoring and sedation (O). The guideline quality was graded. A catalogue of 54 questions was answered. Strength of recommendation and evidence levels were recorded for each recommendation. RESULTS Six guidelines on general bronchoscopy and three expert statements on special bronchoscopic procedures were identified. Four guidelines were evidence-based. Most guidelines recommend sedation to improve the patient's tolerance. Midazolam combined with an opioid is preferred. The standard monitoring consists of non-invasive blood pressure, and pulse oximetry, furthermore electrocardiogram in cardiac patients. Only one guideline discusses hypercapnia and capnometry, but without consensus. Two guidelines discuss a recovery time of two hours, but a recommendation was not given because of lack of evidence. CONCLUSION Evidence for most issues is low to moderate. Lung-diseased patients are not represented by current guidelines. Capnometry and recovery time lack evidence. More primary research in these fields is needed so that future guidelines may address these issues, too.
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Affiliation(s)
- Daniel Strohleit
- Lung Clinic Cologne-Merheim, Thoracic Surgery, Hospital of Cologne, University of Witten/Herdecke, Ostmerheimer Str. 200, 51109, Cologne, Germany
| | - Thomas Galetin
- Lung Clinic Cologne-Merheim, Thoracic Surgery, Hospital of Cologne, University of Witten/Herdecke, Ostmerheimer Str. 200, 51109, Cologne, Germany.
| | - Nils Kosse
- Lung Clinic Cologne-Merheim, Thoracic Surgery, Hospital of Cologne, University of Witten/Herdecke, Ostmerheimer Str. 200, 51109, Cologne, Germany
| | - Alberto Lopez-Pastorini
- Lung Clinic Cologne-Merheim, Thoracic Surgery, Hospital of Cologne, University of Witten/Herdecke, Ostmerheimer Str. 200, 51109, Cologne, Germany
| | - Erich Stoelben
- Lung Clinic Cologne-Merheim, Thoracic Surgery, Hospital of Cologne, University of Witten/Herdecke, Ostmerheimer Str. 200, 51109, Cologne, Germany
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Uzunay H, Selvi F, Bedel C, Karakoyun OF. Comparison of ETCO2 Value and Blood Gas PCO2 Value of Patients Receiving Non-invasive Mechanical Ventilation Treatment in Emergency Department. ACTA ACUST UNITED AC 2021; 3:1717-1721. [PMID: 33937634 PMCID: PMC8078828 DOI: 10.1007/s42399-021-00935-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/22/2021] [Indexed: 11/01/2022]
Abstract
Capnography is the non-invasive measurement and graphic representation of the partial pressure of CO2 in expiration. Although there are many studies in the literature comparing the partial pressure of carbon dioxide (pCO2) and end-tidal CO2 (ETCO2) values in patients who underwent IMV (invasive mechanical ventilation), there are no studies showing their interchangeable applicability in patients who received NIMV (non-IMV). We aimed to evaluate whether the use of ETCO2 in the treatment process can replace pCO2 use in patients scheduled for NIMV treatment in the emergency department. Patients who applied to the emergency department with respiratory distress between March 2019 and January 2020, who were diagnosed with acute cardiogenic edema or acute chronic obstructive pulmonary disease (COPD) exacerbation, and who needed NIMV were included in the study. General characteristics of the patients and the pCO2 and ETCO2 values were measured in the blood gas 1 h after the NIMV application was started. 64.2% (99 patients) of the patients included in the study were male, and 35.8% (55 patients) were female. The mean age of the patients included in the study was 69.1 ± 12.2 years. The mean pCO2 values were measured as 52.6 ± 13.2. The mean of ETCO2 values measured simultaneously was 33.6 ± 10.1. There was a significant difference between the controlled pCO2 values and ETCO2 values at the first hour of NIMV treatment (Z: - 10.640, p < 0.001). The ETCO2 level was found to be different in our patients who received NIMV treatment, which could not be used instead of the pCO2 level.
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Affiliation(s)
- Hüseyin Uzunay
- Department of Emergency Medicine, Kas State Hospital, Antalya, Turkey
| | - Fatih Selvi
- Department of Emergency Medicine, Health Science University, Antalya Training and Research Hospital, Antalya, Turkey
| | - Cihan Bedel
- Department of Emergency Medicine, Health Science University, Antalya Training and Research Hospital, Antalya, Turkey
| | - Omer Faruk Karakoyun
- Department of Emergency Medicine, Mugla Sitki Kocman University Training Research Hospital, Mugla, Turkey
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Galetin T, Strohleit D, Magnet FS, Schnell J, Koryllos A, Stoelben E. Hypercapnia in COPD Patients Undergoing Endobronchial Ultrasound under Local Anaesthesia and Analgosedation: A Prospective Controlled Study Using Continuous Transcutaneous Capnometry. Respiration 2021; 100:958-968. [PMID: 33849040 DOI: 10.1159/000515920] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 03/12/2021] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Flexible bronchoscopy (FB) in analgosedation causes alveolar hypoventilation and hypercapnia, the more so if patients suffer from COPD. Nonetheless, neither is capnometry part of standard monitoring nor is there evidence on how long patients should be monitored after sedation. OBJECTIVES We investigated the impact of COPD on hypercapnia during FB with endobronchial ultrasound (EBUS) in sedation and how the periprocedural monitoring should be adapted. METHODS Two cohorts of consecutive patients - with advanced and without COPD - with the indication for FB with EBUS-guided transbronchial needle aspiration in analgosedation received continuous transcutaneous capnometry (ptcCO2) before, during, and for 60 min after the sedation with midazolam and alfentanil. MAIN RESULTS Forty-six patients with advanced COPD and 44 without COPD were included. The mean examination time was 26 ± 9 min. Patients with advanced COPD had a higher peak ptcCO2 (53.7 ± 7.1 vs. 46.8 ± 4.8 mm Hg, p < 0.001) and mean ptcCO2 (49.5 ± 6.8 vs. 44.0 ± 4.4 mm Hg, p < 0.001). Thirty-six percent of all patients reached the maximum hypercapnia after FB in the recovery room (8 ± 11 min). Patients with COPD needed more time to recover to normocapnia (22 ± 24 vs. 7 ± 11 min, p < 0.001). They needed a nasopharyngeal tube more often (28 vs. 11%, p < 0.001). All patients recovered from hypercapnia within 60 min after FB. No intermittent ventilation manoeuvres were needed. CONCLUSION A relevant proportion of patients reached their peak-pCO2 after the end of intervention. We recommend using capnometry at least for patients with known COPD. Flexible EBUS in analgosedation can be safely performed in patients with advanced COPD. For patients with advanced COPD, a postprocedural observation time of 60 min was sufficient.
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Affiliation(s)
- Thomas Galetin
- Department of Thoracic Surgery, Faculty of Health, University Witten/Herdecke, Witten, Germany
| | - Daniel Strohleit
- Department of Thoracic Surgery, Faculty of Health, University Witten/Herdecke, Witten, Germany
| | | | - Jost Schnell
- Department of Thoracic Surgery, Lung-Clinic Cologne-Merheim, Merheim, Germany
| | - Aris Koryllos
- Department of Thoracic Surgery, Faculty of Health, University Witten/Herdecke, Witten, Germany
| | - Erich Stoelben
- Department of Thoracic Surgery, Faculty of Health, University Witten/Herdecke, Witten, Germany
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Dicembrino M, Alejandra Barbieri I, Pereyra C, Leske V. End-tidal CO 2 and transcutaneous CO 2 : Are we ready to replace arterial CO 2 in awake children? Pediatr Pulmonol 2021; 56:486-494. [PMID: 33382537 DOI: 10.1002/ppul.25217] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 11/27/2020] [Accepted: 11/30/2020] [Indexed: 11/08/2022]
Abstract
INTRODUCTION Arterial blood gas analysis (ABG) is the gold standard test for carbon dioxide measurement. End-tidal PCO2 (PetCO2 ) and transcutaneous PCO2 (PtcCO2 ) are noninvasive alternative methods. OBJECTIVE To examine the use of PetCO2 and PtcCO2 as PaCO2 surrogates in awake children. METHODS A prospective observational study. Consecutive awake children in a stable condition referred to the Sleep Unit of Hospital de Pediatría Dr. J. P. Garrahan with suspected or confirmed sleep-related respiratory disorders requiring ABG were included. PetCO2 and PtcCO2 were recorded simultaneously during arterial puncture. PetCO2 and PtCO2 values were compared with PaCO2 . Correlation coefficient and Bland-Altman analysis were applied. The sample size was calculated considering a mean difference ≤3 mmHg as clinically acceptable. RESULTS Sixty-eight sample sets were obtained from 67 patients. The median age was 9.11 years (0.23-18.76). During 94.1% of the procedures patients breathed spontaneously, 30% needed multiple punctures and 92% resulted in pain. Median (IQR) PaCO2 (mmHg) was 36.3 (31.45; 40.90), PetCO2 33.0 (29; 39) and PtcCO2 38.8 (32.95; 43.32). Correlation and agreement for PaCO2 /PetCO2 and PaCO2 /PtcCO2 was r = .6 and .9, and media of bias = 2.83 (-9.97; 15.64) and -1.88 (-9.01; 5.24), respectively. Hypercapnia (PaCO2 > 45.0 mmHg) was present in 8/68 (11.8%) samples. Sensitivity, specificity, positive predictive value and negative predictive value to detect hypercapnia with PetCO2 was 38%, 98%, 75%, and 92%, respectively, and with PtcCO2 , 100%, 90%, 57%, and 100%, respectively. CONCLUSION PtcCO2 showed better agreement with PaCO2 than PetCO2 but because of the wide dispersion of values, neither method can replace the gold standard. Transcutaneous CO2 might be a good screening tool to detect hypercapnia in awake children.
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Affiliation(s)
- Manuela Dicembrino
- Sleep Unit, Pulmonology Department, Hospital de Pediatría Prof. Dr. J. P. Garrahan, Buenos Aires, Argentina
| | | | - Carla Pereyra
- Pediatrics Department, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Vivian Leske
- Sleep Unit, Pulmonology Department, Hospital de Pediatría Prof. Dr. J. P. Garrahan, Buenos Aires, Argentina
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"Tricks and tips for home mechanical ventilation" Home mechanical ventilation: set-up and monitoring protocols. Pulmonology 2020; 27:144-150. [PMID: 32912752 DOI: 10.1016/j.pulmoe.2020.08.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 07/31/2020] [Accepted: 08/01/2020] [Indexed: 11/22/2022] Open
Abstract
In this part of the review series "Tricks and tips for home mechanical ventilation", we will discuss the evidence with regard to the place and manner of home mechanical ventilation initiation and follow-up. Outsourcing more and more of this chronic care to the home situation is a big challenge for the future: especially for the home situation, monitoring has to be non-invasive, reliable and easy to use, data security needs to be ensured, signals need to be integrated and preferably automatically processed and algorithms need to be developed based on clinically relevant outcomes.
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Duyu M, Mocan Çağlar Y, Karakaya Z, Usta Aslan M, Yılmaz S, Ören Leblebici AN, Doğan Bektaş A, Bahar M, Yersel MN. Comparison of arterial CO 2 estimation by end-tidal and transcutaneous CO 2 measurements in intubated children and variability with subject related factors. J Clin Monit Comput 2020; 35:101-111. [PMID: 32720231 PMCID: PMC7384390 DOI: 10.1007/s10877-020-00569-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 07/22/2020] [Indexed: 02/06/2023]
Abstract
Transcutaneous PCO2 (PTCCO2) and end-tidal PCO2 (PETCO2) measurement methods serve as alternatives to arterial PCO2 (PaCO2), providing continuous non-invasive monitoring. The objective of this study was to evaluate the PTCCO2 and PETCO2 methods with actual PaCO2 levels, and to assess the variability of measurements in relation to subject-related factors, such as skin and subcutaneous adipose tissue thickness and presence of pulmonary diseases. PTCCO2, PETCO2 and PaCO2 were measured at the same time in intubated pediatric subjects. Subjects' demographic characteristics, clinical features, laboratory parameters, skin and subcutaneous adipose tissue thickness were identified. The study was carried out on 102 subjects with a total of 1118 values for each method. In patients with non-pulmonary disease, the mean difference between PTCCO2 and PaCO2 was - 0.29 mmHg (± 6.05), while it was 0.44 mmHg (± 6.83) bias between PETCO2 and PaCO2. In those with pulmonary diseases, the mean difference between PTCCO2 and PaCO2 was - 1.27 mmHg (± 8.32), while it was - 4.65 mmHg (± 9.01) between PETCO2 and PaCO2. Multiple linear regression demonstrated that increased subcutaneous adipose tissue thickness, core body temperature and inotropic index were related with higher PTCCO2 values relative to the actual PCO2 values. Other factors, such as skin tissue thickness, presence of pulmonary disease, measurement location and measurement times were non-significant. The PTCCO2 method has higher reliability than the PETCO2 method, and PTCCO2 measurements are not influenced by most subject-related factors; however, core body temperature, inotropic index and subcutaneous adipose tissue thickness can lead to significant differences in PCO2 measurement.
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Affiliation(s)
- Muhterem Duyu
- Department of Pediatrics, Pediatric Intensive Care Unit, Istanbul Medeniyet University Goztepe Training and Research Hospital, Istanbul, Turkey.
| | - Yasemin Mocan Çağlar
- Department of Pediatrics, Istanbul Medeniyet University Goztepe Training and Research Hospital, Istanbul, Turkey
| | - Zeynep Karakaya
- Department of Pediatrics, Istanbul Medeniyet University Goztepe Training and Research Hospital, Istanbul, Turkey
| | - Mine Usta Aslan
- Department of Radiology, Istanbul Medeniyet University Goztepe Training and Research Hospital, Istanbul, Turkey
| | - Seyhan Yılmaz
- Department of Pediatrics, Istanbul Medeniyet University Goztepe Training and Research Hospital, Istanbul, Turkey
| | - Aslı Nur Ören Leblebici
- Department of Pediatrics, Istanbul Medeniyet University Goztepe Training and Research Hospital, Istanbul, Turkey
| | - Anıl Doğan Bektaş
- Department of Pediatrics, Istanbul Medeniyet University Goztepe Training and Research Hospital, Istanbul, Turkey
| | - Meral Bahar
- Department of Pediatrics, Istanbul Medeniyet University Goztepe Training and Research Hospital, Istanbul, Turkey
| | - Meryem Nihal Yersel
- Department of Pediatrics, Pediatric Intensive Care Unit, Istanbul Medeniyet University Goztepe Training and Research Hospital, Istanbul, Turkey
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Ergan B, Oczkowski S, Rochwerg B, Carlucci A, Chatwin M, Clini E, Elliott M, Gonzalez-Bermejo J, Hart N, Lujan M, Nasilowski J, Nava S, Pepin JL, Pisani L, Storre JH, Wijkstra P, Tonia T, Boyd J, Scala R, Windisch W. European Respiratory Society guidelines on long-term home non-invasive ventilation for management of COPD. Eur Respir J 2019; 54:13993003.01003-2019. [DOI: 10.1183/13993003.01003-2019] [Citation(s) in RCA: 106] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2019] [Accepted: 07/13/2019] [Indexed: 02/07/2023]
Abstract
BackgroundWhile the role of acute non-invasive ventilation (NIV) has been shown to improve outcome in acute life-threatening hypercapnic respiratory failure in COPD, the evidence of clinical efficacy of long-term home NIV (LTH-NIV) for management of COPD is less. This document provides evidence-based recommendations for the clinical application of LTH-NIV in chronic hypercapnic COPD patients.Materials and methodsThe European Respiratory Society task force committee was composed of clinicians, methodologists and experts in the field of LTH-NIV. The committee developed recommendations based on the GRADE (Grading, Recommendation, Assessment, Development and Evaluation) methodology. The GRADE Evidence to Decision framework was used to formulate recommendations. A number of topics were addressed under a narrative format which provides a useful context for clinicians and patients.ResultsThe task force committee delivered conditional recommendations for four actionable PICO (target population-intervention-comparator-outcome) questions, 1) suggesting for the use of LTH-NIV in stable hypercapnic COPD; 2) suggesting for the use of LTH-NIV in COPD patients following a COPD exacerbation requiring acute NIV 3) suggesting for the use of NIV settings targeting a reduction in carbon dioxide and 4) suggesting for using fixed pressure support as first choice ventilator mode.ConclusionsManaging hypercapnia may be an important intervention for improving the health outcome of COPD patients with chronic respiratory failure. The task force conditionally supports the application of LTH-NIV to improve health outcome by targeting a reduction in carbon dioxide in COPD patients with persistent hypercapnic respiratory failure. These recommendations should be applied in clinical practice by practitioners that routinely care for chronic hypercapnic COPD patients.
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Karagiannidis C, Merten ML, Heunks L, Strassmann SE, Schäfer S, Magnet F, Windisch W. Respiratory acidosis during bronchoscopy-guided percutaneous dilatational tracheostomy: impact of ventilator settings and endotracheal tube size. BMC Anesthesiol 2019; 19:147. [PMID: 31399057 PMCID: PMC6689167 DOI: 10.1186/s12871-019-0824-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 08/06/2019] [Indexed: 11/10/2022] Open
Abstract
Background The current study investigates the effect of bronchoscopy-guided percutaneous dilatational tracheostomy (PDT) on the evolution of respiratory acidosis depending on endotracheal tube (ET) sizes. In addition, the impact of increasing tidal volumes during the intervention was investigated. Methods Two groups of ICU-patients undergoing bronchoscopy-guided PDT with varying tidal volumes and tube sizes were consecutively investigated: 6 ml/kg (N = 29, mean age 57.4 ± 14.5 years) and 12 ml/kg predicted body weight (N = 34, mean age 59.5 ± 12.8 years). Results The mean intervention time during all procedures was 10 ± 3 min. The combination of low tidal volumes and ETs of 7.5 mm internal diameter resulted in the most profound increase in PaCO2 (32.2 ± 11.6 mmHg) and decrease in pH-value (− 0.18 ± 0.05). In contrast, the combination of high tidal volumes and ETs of 8.5 mm internal diameter resulted in the least profound increase in PaCO2 (8.8 ± 9.0 mmHg) and decrease of pH (− 0.05 ± 0.04). The intervention-related increase in PaCO2 was significantly lower when using higher tidal volumes for larger ET: internal diameter 7.5, 8.0 and 8.5: P > 0.05, =0.006 and = 0.002, respectively. Transcutaneous PCO2 monitoring revealed steadily worsening hypercapnia during the intervention with a high correlation of 0.87 and a low bias of 0.7 ± 9.4 mmHg according to the Bland-Altman analysis when compared to PaCO2 measurements. Conclusions Profound respiratory acidosis following bronchoscopy-guided PDT evolves in a rapid and dynamic process. Increasing the tidal volume from 6 to 12 ml/kg PBW was capable of attenuating the evolution of respiratory acidosis, but this effect was only evident when using larger ETs. Trial registration DRKS00011004. Registered 20th September 2016. Electronic supplementary material The online version of this article (10.1186/s12871-019-0824-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Christian Karagiannidis
- Department of Pneumology and Critical Care Medicine, Cologne-Merheim Hospital, Kliniken der Stadt Köln GmbH, Witten/Herdecke University Hospital, Ostmerheimer Strasse 200, D-51109, Cologne, Germany.
| | - Michaela L Merten
- Department of Pneumology and Critical Care Medicine, Cologne-Merheim Hospital, Kliniken der Stadt Köln GmbH, Witten/Herdecke University Hospital, Ostmerheimer Strasse 200, D-51109, Cologne, Germany
| | - Leo Heunks
- Dept of Intensive Care Medicine, Amsterdam UMC, location VUmc, Amsterdam, The Netherlands
| | - Stephan E Strassmann
- Department of Pneumology and Critical Care Medicine, Cologne-Merheim Hospital, Kliniken der Stadt Köln GmbH, Witten/Herdecke University Hospital, Ostmerheimer Strasse 200, D-51109, Cologne, Germany
| | - Simone Schäfer
- Department of Pneumology and Critical Care Medicine, Cologne-Merheim Hospital, Kliniken der Stadt Köln GmbH, Witten/Herdecke University Hospital, Ostmerheimer Strasse 200, D-51109, Cologne, Germany
| | - Friederike Magnet
- Department of Pneumology and Critical Care Medicine, Cologne-Merheim Hospital, Kliniken der Stadt Köln GmbH, Witten/Herdecke University Hospital, Ostmerheimer Strasse 200, D-51109, Cologne, Germany
| | - Wolfram Windisch
- Department of Pneumology and Critical Care Medicine, Cologne-Merheim Hospital, Kliniken der Stadt Köln GmbH, Witten/Herdecke University Hospital, Ostmerheimer Strasse 200, D-51109, Cologne, Germany
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Ergan B, Nasiłowski J, Winck JC. How should we monitor patients with acute respiratory failure treated with noninvasive ventilation? Eur Respir Rev 2018; 27:27/148/170101. [PMID: 29653949 DOI: 10.1183/16000617.0101-2017] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Accepted: 12/21/2017] [Indexed: 12/12/2022] Open
Abstract
Noninvasive ventilation (NIV) is currently one of the most commonly used support methods in hypoxaemic and hypercapnic acute respiratory failure (ARF). With advancing technology and increasing experience, not only are indications for NIV getting broader, but more severe patients are treated with NIV. Depending on disease type and clinical status, NIV can be applied both in the general ward and in high-dependency/intensive care unit settings with different environmental opportunities. However, it is important to remember that patients with ARF are always very fragile with possible high mortality risk. The delay in recognition of unresponsiveness to NIV, progression of respiratory failure or new-onset complications may result in devastating and fatal outcomes. Therefore, it is crucial to understand that timely action taken according to monitoring variables is one of the key elements for NIV success. The purpose of this review is to outline basic and advanced monitoring techniques for NIV during an ARF episode.
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Affiliation(s)
- Begum Ergan
- Division of Intensive Care, Dept of Pulmonary and Critical Care, Faculty of Medicine, Dokuz Eylul University, Izmir, Turkey .,Both authors contributed equally
| | - Jacek Nasiłowski
- Department of Internal Medicine, Pulmonary Diseases and Allergy, Medical University of Warsaw, Warsaw, Poland.,Both authors contributed equally
| | - João Carlos Winck
- Northern Rehabilitation Centre Cardio-Pulmonary Group, Vila Nova de Gaia, Respiratory Medicine Units of Trofa-Saúde Alfena Hospital and Braga-Centro Hospital and Faculty of Medicine University of Porto, Porto, Portugal
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15
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Benton MJ, Lim TK, Ko FWS, Kan-O K, Mak JCW. Year in review 2017: Chronic obstructive pulmonary disease and asthma. Respirology 2018; 23:538-545. [PMID: 29502339 DOI: 10.1111/resp.13285] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Revised: 02/13/2018] [Accepted: 02/14/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Melissa J Benton
- Helen and Arthur E. Johnson Beth-El College of Nursing and Health Sciences, University of Colorado, Colorado Springs, CO, USA
| | - Tow Keang Lim
- Department of Medicine, National University Hospital, Singapore
| | - Fanny W S Ko
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong
| | - Keiko Kan-O
- Research Institute for Diseases of the Chest, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Judith C W Mak
- Department of Medicine, The University of Hong Kong, Hong Kong.,Department of Pharmacology and Pharmacy, The University of Hong Kong, Hong Kong
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16
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Schwarz S, Callegari J, Hamm C, Windisch W, Magnet F. Is Outpatient Control of Long-Term Non-Invasive Ventilation Feasible in Chronic Obstructive Pulmonary Disease Patients? Respiration 2017; 95:154-160. [DOI: 10.1159/000484569] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Accepted: 10/24/2017] [Indexed: 11/19/2022] Open
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