Vascular Surgery Patients at Risk for Malnutrition Are at an Increased Risk of Developing Postoperative Complications

Multimodal Prehabilitation for Peripheral Arterial Disease Patients with Intermittent Claudication-A Pilot Randomized Controlled Trial

BACKGROUND

To establish the feasibility and safety of multimodal prehabilitation (MP), and to obtain pilot data on the change in quality of life, functional walking capacity, and the need for surgery for a full-scale trial.

METHODS

Pilot randomized controlled trial that included patients older than 50 years old suffering from moderate to severe intermittent claudication and who were candidates for endovascular revascularization (ER). Participants were excluded if they presented with ischemic rest pain, gangrene or ulceration of the index leg, significant lesions in the iliac vessels, planned surgical bypass, comorbidities in which exercise was contraindicated or if they were unable to speak English or French. Participants were randomized in a 1:1 ratio to 12 weeks of MP or institutional standard of care (unsupervised walking advice). MP consisted of i)1 weekly supervised exercise session; ii) home-based exercise prescription; iii) nutritional counseling and supplementation; iv) smoking cessation therapy; and v) psychosocial support. Feasibility and safety were measured with recruitment and retention rates, as well as the occurrence of any adverse events. In addition, barriers to attend supervised sessions and compliance to each component were assessed. Change in functional walking capacity, health-related quality of life, and the rates of patients deciding not to undergo ER were collected and analyzed throughout the follow-up period of 12 months.

RESULTS

Of the 37 patients referred for eligibility, 27 (73%) accepted to participate in the trial and were randomized. Of the 27 patients included, 24 completed the 12-week program. Adherence to each prehabilitation component was 83% interquartile range [72,93] for supervised exercise, 90% [83,96] for home-based exercise and 69% [45,93] for nutritional sessions. Fifty percent of patients were referred for and underwent psychosocial intervention and 40% of the active smokers enrolled in the smoking cessation program. No adverse events were observed during the program. The 2 main barriers for not fully adhering to the intervention were excessive pain while performing the exercises and the difficulty to keep up with the prescribed exercises. A statistically significant mean change (standard deviation (SD)) was seen in the MP group versus standard of care for functional capacity, mean (SD) 6 Min Walk Test 60 (74) vs. -11 (40) meters P < 0.05, and quality of life mean (SD) VascuQol 1.15 (0.54) vs. -0.3 (1.09) points P < 0.05. There was no statistically significant difference between groups in the rates of patients deciding to undergo ER during the 1-year follow-up period.

CONCLUSIONS

The results of this pilot trial demonstrate that MP is safe and feasible. A 12-week MP program seems to improve quality of life and functional walking capacity to a greater extent than unsupervised walking advice. There is a need for a large-scale trial to investigate the effectiveness of MP at improving quality of life and assessing its impact on the rates of patients deciding not to undergo or delay ER. The long-term functional and quality of life outcomes of the patients deciding to undergo ER after prehabilitation also need to be assessed.

Association Between Undernutrition and Mortality and Amputation Outcomes in Chronic Limb Threatening Ischaemia: A Systematic Review

OBJECTIVE

Nutritional status plays a complex role in the pathophysiology and outcomes of chronic limb threatening ischaemia (CLTI). Undernutrition may be a modifiable risk factor. Given the variability in nutritional status concepts in CLTI outcomes studies, a systematic review examining the association between undernutrition and outcomes in patients with CLTI was conducted.

DATA SOURCES

A systematic literature search of nine databases (Allied and Complementary Medicine Database [AMED], CINAHL Complete, Cochrane Library, Google Scholar, Ovid Medline, Ovid Embase, PubMed, Scopus, and Web of Science Core Collection databases) was conducted up to 23 May 2023.

REVIEW METHODS

Inclusion criteria were randomised controlled trials, cohort studies, and case control studies of patients with CLTI conducted after 1982 that reported the effect size for a nutritional status measure and the outcomes of death, amputation, or a composite of the two. Two reviewers independently performed screening, data extraction, and quality assessment, with a third independent reviewer resolving conflicts.

RESULTS

A total of 6 818 citations were screened, with 49 observational studies (31 from Japan) included in the review. The mean patient age ranged from 56.0 - 86.9 years. Most included patients were undergoing revascularisation. Unidimensional indicators of undernutrition (including low serum albumin, low body mass index, and zinc deficiency) as well as multidimensional measures (such as nutritional screening tool scores indicating undernutrition) were found to be associated with a statistically significant increased risk of death, amputation, and composite events in most studies. Effect sizes of the association were generally larger when multidimensional nutritional screening tools were used. However, the quality of evidence was poor, and certainty of evidence very low.

CONCLUSION

Undernutrition is consistently associated with an increased risk of death and amputation in patients with CLTI, regardless of the measure used. Broader efforts to understand the framework of nutritional status and validation of nutritional screening tools in CLTI populations are needed.

Association of Controlling Nutritional Status Score With Mortality in Patients With Chronic Limb-Threatening Ischemia Following Endovascular Revascularization

BACKGROUND

Chronic limb-threatening ischemia (CLTI) represents the severest manifestation of peripheral artery disease. Malnutrition is closely associated with poor clinical outcomes in patients with chronic diseases. The Controlling Nutritional Status (CONUT) score is a tool to evaluate the systemic inflammation and nutritional status. This study aimed to investigate the association of baseline CONUT score with mortality in patients with CLTI following endovascular revascularization.

METHODS

A single-center retrospective analysis of patients with CLTI undergoing endovascular revascularization between January 2015 and December 2022 was performed. Preoperative nutritional status was evaluated using CONUT score, which was calculated using the serum albumin concentration, total peripheral lymphocyte count, and total cholesterol concentration. A CONUT score ≥5 indicates moderate or severe malnutrition. The Kaplan-Meier and multivariate Cox proportional hazards regression were used for survival analysis and to evaluate the risk factors associated with mortality.

RESULTS

Among 232 enrolled patients, 20.7% had moderate or severe malnutrition defined by the CONUT score. During a median follow-up of 2.1 (interquartile ranges, 1.0-3.5) years, 87 (37.5%) patients died. The 3-year overall survival rate in patients with CLTI who underwent endovascular revascularization was 63.7%. The high CONUT (≥5) group had significantly worse 3-year overall survival (42.0% vs. 68.8%, P = 0.004) and limb salvage (73.3% vs. 84.1%, P = 0.005) rates than the low CONUT (<5) group. Multivariate analysis showed that high CONUT score was significantly associated with increased risk for mortality in patients with CLTI after endovascular revascularization (hazard ratio, 1.687; 95% confidence interval, 1.031-2.759; P = 0.037).

CONCLUSIONS

The present study indicated that moderate or severe malnutrition defined by the CONUT score was significantly associated with increased mortality in patients with CLTI following endovascular revascularization. Future study is required to evaluate the efficacy of nutritional intervention in these patients.

Perceptions, Experiences, Barriers and Facilitators Regarding Nutritional Intake of Patients with Chronic Limb Threatening Ischemia: A Qualitative Study

BACKGROUND

Patients with chronic limb threatening ischemia (CLTI) are at high risk for amputation and other cardiovascular adverse events. Nutrition-related symptoms and malnutrition are common in the CLTI population, and lead to worse clinical outcomes. Understanding of the factors influencing nutritional intake is required to determine whether optimization of nutritional intake in this population requires interventions. Therefore, this study aimed to describe perceptions and experiences on nutrition of patients with CLTI, and to identify perceived barriers and facilitators influencing their nutritional intake.

METHODS

In this phenomenological qualitative study, individual semi-structured, face-to-face interviews were conducted with patients with CLTI who lived independently. Interviews were transcribed verbatim, and reflexive thematic analysis was performed.

RESULTS

Twelve participants were interviewed. Five themes were generated: (1) lack of nutritional risk perception, (2) role of nutrition for health, functioning, and surviving, (3) multiple factors influencing nutritional intake, (4) limited nutritional advice, and (5) no intention to change current nutritional intake.

CONCLUSIONS

Patients with CLTI perceive nutritional intake as a necessity to survive and function. Patients express limited risk perception regarding adequate nutritional intake and undernutrition. Nutritional intake is mainly based on non-health-related factors, as habits and taste, and multiple barriers hinder nutritional intake. Patients received no or only limited nutritional advice. Together this leads to an expressed lack of intention to change nutritional intake. Findings of this study stress the urgency for patient-centered nutritional support, to increase nutrition-related knowledge and motivation, to prevent or treat undernutrition, and may improve clinical outcomes in patients with CLTI.

A scoping review on nutritional intake and nutritional status in people with a major dysvascular lower limb amputation

PURPOSE

To systematically review literature on nutritional intake, nutritional status and nutritional interventions, and to study their association with short- and long-term clinical outcomes in people with a major dysvascular lower limb amputation.

METHODS

PubMed, Ovid, CINAHL, and The Cochrane Library were searched. Studies were included if nutritional intake, nutritional status, or nutritional interventions in people with a major dysvascular lower limb amputation were analyzed.

RESULTS

Of the 3038 unique papers identified, 30 studies were included. Methodological quality was moderate (1 study) or weak (29 studies). Limited information was available on nutritional intake (2 studies) and nutritional interventions (1 study). Nutritional intake and nutritional status were assessed by diverse methods. The percentage of people with a poor nutritional status ranged from 1% to 100%. In some studies, measures of poor nutritional status were associated with adverse short- and long-term clinical outcomes.

CONCLUSIONS

The percentage of people with a poor nutritional status is inconclusive in the major dysvascular lower limb amputation population, because of the heterogeneity of the assessment methods used. Some included studies reported a negative association between poor nutritional status and clinical outcomes. However, these results should be interpreted with caution, because of the limited quality of the studies available. Studies high in methodological quality and high in hierarchy of evidence are needed.IMPLICATIONS FOR REHABILITATIONThe proportion of people with a poor nutritional status in the major dysvascular lower limb amputation population is inconclusive.Poor nutritional status seems to affect clinical outcomes negatively.More uniformity in assessment of malnutrition in the major dysvascular lower limb amputation population is needed.

An evidence-based review of optimal perioperative practices in minor hand surgery

BACKGROUND

Like many surgical subspecialties, there have been frequent advancements and discoveries in the field of hand and upper extremity surgery. With a rapidly growing literature base, it can be difficult to remain updated on the latest recommendations.

METHODS

A comprehensive literature search was completed on PubMed using MeSH terms. Topics included nutrition management, anticoagulation, immunosuppressive medication management, antibiotic use, skin preparation, splinting, tourniquet use, and suture choice. Data from articles with a level of evidence 1A-3 C were included.

RESULTS

A total of 42 articles were identified and reviewed to provide evidence for recommendations regarding various aspects of pre-, intra-, and post-operative care.

CONCLUSIONS

The objective of this manuscript is to serve as a resource for evidence-based recommendations by the findings of recent evidence related to perioperative care in elective hand surgery. Additional studies are required in certain areas of the literature in order to provide stronger recommendations.

Prophylactic use of incisional negative pressure wound therapy for the prevention of surgical site occurrences in general surgery: Consensus document

BACKGROUND

Surgical site occurrences pose a threat to patient health, potentially resulting in significant increases in health care spending caused by using additional resources. The objective of this study was to reach a consensus among a group of experts in incisional negative pressure wound therapy to determine the indications for using this type of treatment prophylactically and to analyze the associated risk factors of surgical site occurrences in abdominal surgery.

METHODS

A group of experts in incisional negative pressure wound therapy from Spain and Portugal was formed among general surgery specialists who frequently perform colorectal, esophagogastric, or abdominal wall surgery. The Coordinating Committee performed a bibliographic search to identify the most relevant publications and to create a summary table to serve as a decision-making protocol regarding the use of prophylactic incisional negative pressure wound therapy based on factors related to the patient and type of procedure.

RESULTS

The patient risk factors associated with surgical site occurrence development such as age, immunosuppression, anticoagulation, hypoalbuminemia, smoking, American Society of Anesthesiologists classification, diabetes, obesity, and malnutrition were analyzed. For surgical procedure factors, surgical time, repeated surgeries, organ transplantation, need for blood transfusion, complex abdominal wall reconstruction, surgery at a contaminated site, open abdomen closure, emergency surgery, and hyperthermic intraperitoneal chemotherapy were analyzed.

CONCLUSION

In our experience, this consensus has been achieved on a tailored set of recommendations on patient and surgical aspects that should be considered to reduce the risk of surgical site occurrences with the use of prophylactic incisional negative pressure wound therapy, particularly in areas where the evidence base is controversial or lacking.

Effect of Body Mass Index on Early Outcomes of Endovascular Abdominal Aortic Aneurysm Repair

BACKGROUND

This study compares the presentation, management, and outcomes of patients undergoing endovascular abdominal aortic aneurysm repair (EVAR), based on their weight status as defined by their body mass index (BMI).

METHODS

Patients with primary EVAR for ruptured and intact abdominal aortic aneurysm (AAA) were identified in the National Surgical Quality Improvement Program database (2016-2019). Patients were categorized by weight status (underweight: BMI < 18.5 kg/m², normal weight: 18.5-24.9 kg/m², overweight: 25-29.9 kg/m², Obese I: 30-34.9 kg/m², Obese II: 35-39.9 kg/m², Obese III: > 40 kg/m²). Preoperative characteristics and 30-day outcomes were compared.

RESULTS

Of 3,941 patients, 4.8% were underweight, 24.1% normal weight, 37.6% overweight, and 22.5% with Obese I, 7.8% Obese II, and 3.3% Obese III status. Underweight patients presented with larger (6.0 [5.4-7.2] cm) and more frequently ruptured (25.0%) aneurysms than normal weight patients (5.5 [5.1-6.2] cm and 4.3%, P < 0.001 for both). Pooled 30-day mortality was worse for underweight (8.5%) compared to all other weight status (1.1-3.0%, P < 0.001), but risk-adjusted analysis demonstrated that aneurysm rupture (odds ratio [OR] 15.9, 95% confidence interval [CI] 8.98-28.0) and not underweight status (OR 1.75, 95% CI 0.73-4.18) accounted for increased mortality in this population. Obese III status was associated with prolonged operative time and respiratory complications after ruptured AAA, but not 30-day mortality (OR 0.82, 95% CI 0.25-2.62).

CONCLUSIONS

Patients at either extreme of the BMI range had the worst outcomes after EVAR. Underweight patients represented only 4.8% of all EVARs, but 21% of mortalities, largely attributed to higher incidence of ruptured AAA at presentation. Severe obesity, on the other hand, was associated with prolonged operative time and respiratory complications after EVAR for ruptured AAA. BMI, as an independent factor, was however not predictive of mortality for EVAR.

Preoperative dysphagia risk in community-dwelling adults aged ≥50 years: Prevalence and risk factors

BACKGROUND

Preoperative dysphagia screening is rare. The purpose of this study was to assess the prevalence and potential risk factors of preoperative dysphagia risk in adults preparing for surgery.

METHODS

The Eating Assessment Tool (EAT-10), Patient-Generated Subjective Global Assessment Short Form (PG-SGA SF), and Sarcopenia Screening Tool (SARC-F) were self-administered in adults preparing for surgery to identify dysphagia, malnutrition, and sarcopenia risk, respectively. Other variables collected include clinical demographics, fall risk, and surgical history associated with increased dysphagia risk. Descriptive summary statistics, univariate analysis, and logistic regression were performed as appropriate.

RESULTS

The median age was 69 years and preoperative dysphagia risk was 9.6%. Among 357 patients completing both EAT-10 and PG-SGA SF or SARC-F, 7.3% had preoperative dysphagia and malnutrition risk and 7.2% had preoperative dysphagia and sarcopenia risk. Preoperative dysphagia risk was 2.7 times greater in those with prior surgical history associated with increased risk of dysphagia, 2.2 times higher in women, and almost twice as high in Black patients and patients with fall risk. Logistic regression revealed significant odds ratios (ORs) for prior surgical history associated with increased risk of dysphagia (OR, 2.95; 95% CI, 1.62-5.40) and male sex (OR, 0.52; 95% CI, 0.29-0.94), and a significant relationship between preoperative dysphagia and malnutrition risk (OR, 4.56; 95% CI, 2.02-10.28) when controlling for clinical variables.

CONCLUSION

The high prevalence of dysphagia risk alone and in combination with malnutrition and sarcopenia risk in community-dwelling adults underscores the need for standardized preoperative screening and optimization prior to surgery.

Comparison of nutritional risk screening with NRS2002 and the GLIM diagnostic criteria for malnutrition in hospitalized patients

Nutritional risk screening, to identify patients at risk of malnutrition, is the first step in the prevention and treatment of malnutrition in hospitalized patients, and should be followed by a thorough nutritional assessment resulting in a diagnosis of malnutrition and subsequent treatment. In 2019, a consensus on criteria has been suggested for the diagnosis of malnutrition by the Global Leadership Initiative for Malnutrition (GLIM). This study investigates the diagnosis of malnutrition in hospitalized patients using nutritional risk screening and the diagnostic assessment suggested by GLIM. Hospitalized patients (excluding cancer, intensive care, and transmissible infections) who underwent nutritional risk screening (by NRS2002) were included. Nutritional risk screening was followed by anthropometric measurements including measurement of muscle mass, assessment of dietary intake and measurement of serum C-reactive protein (CRP) for inflammation in all patients. Malnutrition was diagnosed according to the GLIM-criteria. In total, 328 patients (median age 71 years, 47% women, median length of stay 7 days) were included. Nutritional risk screening identified 143 patients as at risk of malnutrition, while GLIM criteria led to a diagnosis of malnutrition in 114 patients. Of these 114 patients, 77 were also identified as at risk of malnutrition by NRS2002, while 37 patients were not identified by NRS2002. Malnutrition was evident in fewer patients than at risk of malnutrition, as expected. However, a number of patients were malnourished who were not identified by the screening procedure. More studies should investigate the importance of inflammation and reduced muscle mass, which is the main difference between nutritional risk screening and GLIM diagnostic assessment.

Obesity paradox among patients undergoing total knee arthroplasty: a retrospective cohort study

BACKGROUND

Obesity has been recognized as the risk factor for postoperative complication for surgical patients. However, recent studies have showed protective effect of obesity in surgical and non-surgical patients. Our study is to examine the association of body mass index(BMI) with early postoperative complications in patients undergoing total knee arthroplasty.

MATERIALS AND METHODS

All patients who had primary total knee arthroplasty between January 2014 and December 2019 were included. Medical records were retrospectively reviewed and BMI was categorized as underweight(BMI < 18.5), normal weight(18.5 < BMI < 24.9), overweight I(25 < BMI < 27.4), overweight II(27.5 < BMI < 29.9), obese I(30 < BMI < 34.9) and obese II(BMI ≥ 35). The association between BMI and occurrence of early postoperative complications was examined and logistic regression was used to calculate relationship between BMI and early postoperative complications.

RESULTS

A total of 2969 patients were included in our analysis. The overall complication rate in patients undergoing total knee arthroplasty was 14.8%, with the highest complication being 22.2% in the underweight group, the second highest in the normal weight group(17.5%), the lowest in the overweight I(13.8%) and obese I(12.0%) group and then higher again in obese II group(16.7%). In multivariable analyses, overweight I (OR 0.737, 95% CI 0.559-0.972, P = 0.031) and obese I (OR 0.631, 95% CI 0.449-0.885, P = 0.008) were associated with lower risk of early postoperative complications after total knee arthroplasty.

CONCLUSION

In this retrospective study, overweight and obese patients had a lower risk of early postoperative complications after total knee arthroplasty. Further studies are necessary to confirm and investigate the mechanism of obesity paradox in this surgical population.

TRIAL REGISTRATION

This study had been registrated in www.chictr.org.cn on 25/10/2021 and the registration ID was ChiCTR2100052408.

Protein-energy malnutrition worsens hospitalization outcomes of patients with pancreatic cancer undergoing open pancreaticoduodenectomy

To assess the role of protein-energy malnutrition on perioperative outcomes in patients with pancreatic cancer undergoing open pancreaticoduodenectomy. We conducted a retrospective observational cohort study and investigated patients ≥ 18 years old with pancreatic cancer undergoing open pancreaticoduodenectomy within the National inpatient sample database during 2012-2014. The study population was divided into two groups based on the presence of protein-energy malnutrition. In-hospital mortality, length of stay, cost of hospitalization, and in-hospital complications were compared between the two groups. Logistic and linear regression analyses were used to adjust for potential confounders. A trend analysis was further conducted on the in-hospital outcomes. Of the 12,785 patients aged ≥ 18 years undergoing open pancreaticoduodenectomy during years 2012-2014, 9865 (77.0%) had no protein-energy malnutrition and 2920 (23.0%) had protein-energy malnutrition. Patients with protein-energy malnutrition were found to have significantly higher mortality rate, longer length of hospital stay, and higher total hospital cost compared to those without protein-energy malnutrition. The risks of gastroparesis, small bowel obstruction, intraoperative and postoperative hemorrhage, infectious complications, and several systemic complications were found to be significantly higher in the protein-energy malnutrition group in a multivariate regression model. A study of trends from 2009 to 2012 revealed an increasing prevalence of protein-energy malnutrition, a declining trend in mortality and length of stay and a stable total hospital cost in the protein-energy malnutrition group. Protein-energy malnutrition was found to be associated with higher mortality, longer length of hospital stay and greater hospital cost in pancreatic cancer patients undergoing open pancreaticoduodenectomy, as well as increased occurrence of various systemic complications. Attention should be paid to patients' nutritional status, which can be corrected before surgery as an effective means to optimize postoperative results.

Risk Factors for Delayed Discharge and Adverse Outcomes Following Outpatient Billed Total Knee Arthroplasty

BACKGROUND

The volume of outpatient total knee arthroplasty (TKA) has increased with advances in perioperative protocols, patient selection, and recent policy changes regarding insurance authorization. This study analyzed 30-day outcomes from a national database to better understand risk factors for delayed discharge (length of stay [LOS] ≥1), readmission, and reoperation after outpatient TKA.

METHODS

The National Surgical Quality Improvement Program (NSQIP) database was utilized to collect TKA (CPT 27447) billed as outpatient surgery performed from 2013 to 2018. Patient demographics, comorbidities, and short-term outcomes were collected and compared in LOS 0 versus LOS ≥1 cohorts. Subgroup analysis was completed for TKA performed in 2018, after the Center for Medicare Services removal of TKA from the inpatient-only list.

RESULTS

A total of 13,669 patients had outpatient TKA performed from 2013 to 2018. Most patients had LOS ≥1 day (77.1%). The LOS 0 cohort demonstrated a lower 30-day readmission rate (1.8%) compared to LOS ≥1 (2.8%), P > .01. Both groups demonstrated a low 30-day reoperation rate, LOS 0 (0.7%) and LOS ≥1 (1.1%), P = .05. Regression analysis demonstrated risk factors for LOS ≥1 day included COPD, ASA ≥3, age >75, and BMI >35 kg/m². Regression analysis demonstrated male gender, age >75, ASA ≥3, and albumin <3.5 g/dL were risk factors for readmission. Hypertension was a risk factor for 30-day reoperation.

CONCLUSION

Risk factors for LOS ≥1 day include age >75, ASA ≥3, BMI >35 kg/m². In addition, BMI >35 kg/m² was a risk factor for readmission and reoperation. These findings reinforce appropriate patient selection when considering outpatient TKA.

The association between pre-operative malnutrition and post-amputation clinical outcomes: A systematic review

Background:

In patients who underwent lower limb amputation (LLA), the prevalence of malnutrition and its association with clinical outcomes are unclear.

Objectives:

This systematic review aims to identify literature and summarise existing information on (1) the prevalence of malnutrition in the patients with LLA and (2) the association between pre-operative nutritional status and post-surgery clinical outcomes in patients who require amputation.

Methods:

A search was conducted in four electronic databases (Cochrane Central Register of Controlled Trials (CENTRAL), PubMed, CINAHL and Scopus) to identify eligible studies. The search strategy was based on keywords – amputation, malnutrition and undernutrition. Article were included regardless of the study design; and if they were written in English; included adult patients with lower limb or foot amputation; and performed pre-amputation nutrition assessments.

Results:

Seven articles met the eligibility criteria. Malnutrition was assessed by biochemistry and/or anthropometry – none of which are validated nutrition assessment tools. Nevertheless, abnormal biochemistry and/or anthropometry results were associated with delayed wound healing, complications and failed amputation compared to normal ranges. The association between abnormal biochemistry and/or anthropometry parameters and mortality was less consistent. Only one study used a validated nutrition screen tool and found half of the population with LLA were at risk of malnutrition, but no association was reported.

Conclusions:

The association between malnutrition and clinical outcomes in patients who underwent LLA remains unclear as all the eligible studies that investigated association used unvalidated nutrition assessment tools. There is an urgent need to address this knowledge gap in future research.

Current Clinical Implications of Frailty and Sarcopenia in Vascular Surgery: A Comprehensive Review of the Literature and Consideration of Perioperative Management

Frailty is a well-known geriatric syndrome of impaired physiological reserve and increased vulnerability to stressors. Sarcopenia is also used as a parameter of physical impairment characterized by muscle weakness. As population aging has become more prominent in recent years, both modalities are now regarded as clinically important prognostic tools defined by multidimensional factors that may affect clinical outcomes in various clinical settings. A preoperative surgical risk analysis is mandatory to predict clinical and surgical outcomes in all surgical practices, particularly in high-risk surgical patients. In vascular surgical settings, frailty and sarcopenia have been accepted as useful prognostic tools to evaluate patient characteristics before surgery, as these may predict perioperative clinical and surgical outcomes. Although minimally invasive surgical approaches, such as endovascular therapy, and hybrid approaches have been universally developed, achieving good vascular surgical outcomes for high-risk cohorts remains to be challenge due to the increasing prevalence of elderly patients and multiple preoperative co-morbidities in addition to frailty and sarcopenia. Therefore, to further improve clinical and surgical outcomes, these preoperative geriatric prognostic factors will be of great importance and interest in vascular surgical settings for both physicians and surgeons.

Malnutrition Universal Screening Tool and Patient-Generated Subjective Global Assessment Short Form and their predictive validity in hospitalized patients

BACKGROUND AND AIMS

Malnutrition screening is a first step in the nutrition care process for hospitalized patients, to identify those at risk of malnutrition and associated worse outcome, preceding further assessment and intervention. Frequently used malnutrition screening tools including the Malnutrition Universal Screening Tool (MUST) mainly screen for characteristics of malnutrition, while the Patient-Generated Subjective Global Assessment Short Form (PG-SGA SF) additionally includes risk factors for development of malnutrition, yielding a higher percentage of patients at risk. To investigate whether this translates into higher risk of worse outcome, we aimed to determine the predictive validity of MUST and PG-SGA SF for prolonged hospitalization >8 days, readmission, and mortality <6 months after hospital discharge.

METHODS

In this observational study, MUST was performed according to university hospital protocol. Additional screening using PG-SGA SF was performed within 24 h of hospital admission (high risk: MUST ≥ 2, PG_SGA SF ≥ 9). Associations of MUST and PG-SGA SF with outcomes were analyzed by logistic- and Cox PH-regression.

RESULTS

Of 430 patients analyzed (age 58 ± 16 years, 53% male, BMI 26.9 ± 5.5 kg/m²), MUST and PG-SGA SF identified 32 and 80 at high risk, respectively. One-hundred-eight patients had prolonged hospitalization, 109 were readmitted and 20 died. High risk by MUST was associated with mortality (HR = 3.9; 95% CI 1.3-12.2, P = 0.02), but not with other endpoints. High risk by PG-SGA SF was associated with prolonged hospitalization (OR = 2.5; 95% CI 1.3-5.0, P = 0.009), readmission (HR = 1.9; 95% CI 1.1-3.2, P = 0.03), and mortality (HR = 34.8; 95% CI 4.2-289.3, P = 0.001), independent of age, sex, hospital ward and previous hospitalization <6 months. In the 363/430 patients classified as low risk by MUST, high risk by PG-SGA SF was independently associated with higher risk of readmission (HR = 1.9; 95% CI 1.0-3.5, P = 0.04) and mortality (HR = 19.5; 95% CI 2.0-189.4, P = 0.01).

CONCLUSIONS

Whereas high malnutrition risk by MUST was only associated with mortality, PG-SGA SF was associated with higher risk of prolonged hospitalization, readmission, and mortality. In patients considered as low risk by MUST, high malnutrition risk by PG-SGA SF was also predictive of worse outcome. Our findings support the use of PG-SGA SF in routine care to identify patients at risk of malnutrition and worse outcome, and enable proactive interventions.

Evaluation of the Validity and Feasibility of the GLIM Criteria Compared with PG-SGA to Diagnose Malnutrition in Relation to One-Year Mortality in Hospitalized Patients

BACKGROUND

The Global Leadership Initiative on Malnutrition (GLIM) approach to diagnose malnutrition was published in 2018. An important next step is to use the GLIM criteria in clinical investigations to assess their validity and feasibility.

OBJECTIVE

To compare the validity and feasibility of the GLIM criteria with Patient-Generated Subjective Global Assessment (PG-SGA) in hospitalized patients and to assess the association between malnutrition and 1-year mortality.

DESIGN

Post hoc analysis of a prospective cohort study.

PARTICIPANTS/SETTING

Hospitalized patients (n = 574) from the Departments of Gastroenterology, Gynecology, Urology, and Orthopedics at the Radboudumc academic facility in Nijmegen, The Netherlands, were enrolled from July 2015 through December 2016.

MAIN OUTCOME MEASURES

The GLIM criteria and PG-SGA were applied to identify malnourished patients. Mortality rates were collected from electronic patient records. Feasibility was assessed by evaluating the amount of and reasons for missing data.

STATISTICAL ANALYSES PERFORMED

Concurrent validity was evaluated by assessing the sensitivity, specificity, and Cohen's kappa coefficient for the GLIM criteria compared with PG-SGA. Cox regression analysis was used for the association between the GLIM criteria and PG-SGA and mortality.

RESULTS

Of 574 patients, 160 (28%) were classified as malnourished according to the GLIM criteria and 172 (30.0%) according to PG-SGA (κ = 0.22, low agreement). When compared with PG-SGA, the GLIM criteria had a sensitivity of 43% and a specificity of 79%. Mortality of malnourished patients was more than two times higher than for non-malnourished patients according to the GLIM criteria (hazard ratio [HR], 2.68; confidence interval [CI], 1.33-5.41). Data on muscle mass was missing in 454 of 574 (79%) patients because of practical problems with the assessment using bioimpedance analysis (BIA).

CONCLUSIONS

Agreement between GLIM criteria and PG-SGA was low when diagnosing malnutrition, indicating that the two methods do not identify the same patients. This is supported by the GLIM criteria showing predictive power for 1-year mortality in hospitalized patients in contrast to PG-SGA. The assessment of muscle mass using BIA was difficult to perform in this clinical population.

Sex-based differences in loss of independence after lower extremity bypass surgery

INTRODUCTION

This study analyzes sex-based differences in the risk of discharge to a nonhome facility (loss of independence) after lower extremity revascularization and resultant outcomes.

METHODS

Data from the NSQIP database for years 2015-2017 was utilized to assess sex-based differences in loss of independence and associated unplanned readmission and 30-day amputation using chi-square, student t-test, and multivariate logistic regression analyses where appropriate.

RESULTS

There was increased loss of independence in women (34.9% vs. 26.1 %, p < .01) and associated increase in unplanned readmission (18.4% vs. 13.6 %, p = .01) and length of stay (12.1 days vs 6.5 days, p < .01). Endovascular revascularization was associated with decreased likelihood of loss of independence (OR 0.43, CI 0.36-0.50).

CONCLUSION

Loss of independence after lower extremity bypass surgery affects women more than men and it is associated with worse postoperative outcomes.

Patient-Generated Subjective Global Assessment Short Form better predicts length of stay than Short Nutritional Assessment Questionnaire

OBJECTIVE

Malnutrition screening instruments used in hospitals mainly include criteria to identify characteristics of malnutrition. However, to tackle malnutrition in an early stage, identifying risk factors for malnutrition in addition to characteristics may be valuable. The aim of this study was to determine the predictive validity of the Patient-Generated Subjective Global Assessment (PG-SGA SF), which addresses malnutrition characteristics and risk factors, and the Short Nutritional Assessment Questionnaire (SNAQ), which addresses mainly malnutrition characteristics, for length of stay (LOS) in a mixed hospital population.

METHODS

Patients (N = 443) were screened with the PG-SGA SF and SNAQ in the first 72 h after admission to the lung, cardiology, or surgery ward. The McNemar-Bowker test was used to investigate the symmetry between the SNAQ and PG-SGA SF categorization for low, medium, and high risk. The predictive value of the PG-SGA SF and SNAQ was assessed by γ-regression before and after adjusting for several confounders.

RESULTS

Of the 443 patients included, 23% and 58% were categorized as being at medium/high risk for malnutrition according to the SNAQ and PG-SGA SF, respectively. The regression analysis indicated that LOS of high-risk patients according to PG-SGA SF was 36% longer than that of low-risk patients (P = 0.001). LOS in patients at high risk according to the SNAQ did not significantly differ from that of SNAQ low-risk patients.

CONCLUSIONS

The PG-SGA SF, as a proactive malnutrition screening instrument, predicts LOS in various hospital wards, whereas the SNAQ, as a reactive instrument, does not. Therefore, we recommend the PG-SGA SF for proactive screening for malnutrition risk.

Reversal to normal anatomy after one-anastomosis/mini gastric bypass, indications and results: a systematic review and meta-analysis

This review evaluates the indications and outcomes of one-anastomosis/mini gastric bypass (OAGB/MGB) reversal to normal anatomy. A systematic literature search and meta-analysis was performed in PubMed, Web of Science, and Scopus for articles published by October 1, 2020, including the keywords "one anastomosis gastric bypass," "OAGB," "mini gastric bypass," "MGB," "reversal," "reverse," "malnutrition," and "reversal bariatric surgery". After examining 182 papers involving 11,578 patients, 14 studies were included. A reversal was performed in 119 patients on average 23.6 months after the primary OAGB/MGB surgery. The mean body mass index (BMI) was 22.92 ± 3.47 kg/m² and the mean albumin level was 25.17 ± 4.21 g/L at reversal. The mean length of the common channel (CC) was 383.57 ± 159.35 cm, with a mean biliopancreatic limb (BPL) length of 214.21 ± 48.45 cm. Pooled estimation of the meta-analysis of prevalence studies reported a prevalence of 1% for reversal. The major signs and symptoms of protein-energy malnutrition were the leading causes of the reversal of OAGB/MGB. Bleeding, leakage, and death due to severe liver failure were the most reported complications after reversal, with an overall incidence of 10.9%. In conclusion, OAGB/MGB reversal has a prevalence of 1% and has a complication rate of 10.9%. Protein-energy malnutrition with hypoalbuminemia was the most common etiology. The mean lengths of BPL and CC were reported as 215 cm and 380 cm, respectively, in the cases. Therefore, special attention should be paid to malnutrition in all OAGB/MGB patients during follow-up to prevent severe malnutrition and subsequent increase in reversal procedures.

The Pertinent Literature of Enhanced Recovery after Surgery Programs: A Bibliometric Approach

Background and Objectives: The programs of enhanced recovery after surgery are the new revolution in surgical departments; however, features of this concept have not been systematically explored. Therefore, the purpose of this study was to explore Enhanced recovery after surgery (ERAS)-related research using bibliometric analysis. Materials and Methods: The search strategy of ERAS programs was conducted in the Web of Science database. Bibliometric analysis was further performed by Excel and Bibliometrix software. The relationship between citation counts and Mendeley readers was assessed by linear regression analysis. Results: 8539 studies from 1994-2019 were included in the present research, with reporting studies originating from 91 countries using 18 languages. The United States (US) published the greatest number of articles. International cooperation was discovered in 82 countries, with the most cooperative country being the United Kingdom. Henrik Kehlet was found to have published the highest number of studies. The journal Anesthesia and Analgesia had the largest number of articles. Linear regression analysis presented a strong positive correlation between citations and Mendeley readers. Most research was related to gastrointestinal surgery in this field. Conclusion: This bibliometric analysis shows the current status of ERAS programs from multiple perspectives, and it provides reference and guidance to scholars for further research.

Malnutrition screening on hospital admission: impact of overweight and obesity on comparative performance of MUST and PG-SGA SF

BACKGROUND/OBJECTIVES

Traditional malnutrition screening instruments, including the Malnutrition Universal Screening Tool (MUST), strongly rely on low body mass index (BMI) and weight loss. In overweight/obese patients, this may result in underdetection of malnutrition risk. Alternative instruments, like the Patient-Generated Subjective Global Assessment Short Form (PG-SGA SF), include characteristics and risk factors irrespective of BMI. Therefore, we aimed to compare performance of MUST and PG-SGA SF in malnutrition risk evaluation in overweight/obese hospitalized patients.

SUBJECTS/METHODS

We assessed malnutrition risk using MUST (≥1 = increased risk) and PG-SGA SF (≥4 = increased risk) in adult patients at hospital admission in a university hospital. We compared results for patients with BMI < 25 kg/m² vs. BMI ≥ 25 kg/m².

RESULTS

Of 430 patients analyzed (58 ± 16 years, 53% male, BMI 26.9 ± 5.5 kg/m²), 35% were overweight and 25% obese. Malnutrition risk was present in 16% according to MUST and 42% according to PG-SGA SF. In patients with BMI < 25 kg/m², MUST identified 31% as at risk vs. 52% by PG-SGA SF. In patients with BMI ≥ 25 kg/m², MUST identified 5% as at risk vs. 36% by PG-SGA SF. Agreement between MUST and PG-SGA SF was low (к = 0.143). Of the overweight/obese patients at risk according to PG-SGA SF, 83/92 (90%) were categorized as low risk by MUST.

CONCLUSIONS

More than one-third of overweight/obese patients is at risk for malnutrition at hospital admission according to PG-SGA SF. Most of them are not identified by MUST. Awareness of BMI-dependency of malnutrition screening instruments and potential underestimation of malnutrition risk in overweight/obese patients by using these instruments is warranted.