Langenbeck's Archives of Surgery最新文献

Background: Hypertension resolution following adrenalectomy in patients with primary aldosteronism (PA) remains a critical clinical challenge. Identifying preoperatively which patients will become normotensive is both a priority and a point of contention. In this narrative review, we explore the controversies and unresolved issues surrounding the prediction of hypertension resolution after adrenalectomy in PA.

Methods: A comprehensive literature review was conducted, focusing on studies published between 1954 and 2024 that evaluated all studies that discussed predictive models for hypertension resolution post-adrenalectomy in PA patients. Databases searched included MEDLINE®, Ovid Embase, and Web of Science databases.

Results: The review identified several predictors and predictive models of hypertension resolution, including female sex, duration of hypertension, antihypertensive medication, and BMI. However, inconsistencies in study designs and patient populations led to varied conclusions.

Conclusions: Although certain predictors and predictive models of hypertension resolution post-adrenalectomy in PA patients are supported by evidence, significant controversies and unresolved issues remain. While the current predictive models provide valuable insights, there is a clear need for further research in this area. Future studies should focus on validating and refining these models.

Purpose: Endoscopic thyroidectomy utilizing the Gasless Unilateral Axillary Approach (GUA) offers distinct advantages including clear visibility, simple manipulation, safe oncological outcomes. This technique eliminates postoperative neck scarring, ensures concealed surgical incisions, and minimizes postoperative swallowing discomfort.

Methods: We retrospectively reviewed 150 surgical videos to document key anatomical features and their variations during this procedure.

Results: The GUA endoscopic thyroidectomy, which approaches from the contralateral side, presents significant difficulties in identifying anatomical structures, especially anatomical abnormalities in the contralateral neck, while constructing feasible operative fields. This article offers an in-depth discussion of the anatomical challenges, pitfalls, and viable strategies associated with this surgery, particularly for less experienced surgeons.

Conclusions: Given the intricate interplay of muscular, vascular, and neural anatomical structures, novices in surgery must be well-acquainted with the underlying anatomy to minimize potential complications.

Purpose: Even today, it remains a challenge for healthcare professionals to decide whether a clinically stable patient who is recovering from uncomplicated medium or major surgery would benefit from a postoperative intensive care unit (ICU) admission, or whether they would be at least as adequately cared for by a few hours of monitoring in the post-operative care unit (PACU).

Methods: In this monocentric retrospective observational study, all adult patients who (Deutsche Gesellschaft für Anästhesiologie und Intensivmedizin (DGAI) in Anästh Intensivmed (50):S486-S489, 2009) underwent medium or major surgery between 1 January 1 2014 and 31 December 2018 at the Heidelberg University Surgical Center, and (Vimlati et al. in Eur J Anaesthesiol September 26(9):715-721, 2009) were monitored for 1-12 h in the PACU, and then (De Pietri et al. in World J Gastroenterol 20(9):2304-23207, 2014) transferred to a normal ward (NW) immediately thereafter were included. At the end of the PACU stay, each patient was cleared by both a surgeon and an anesthesiologist to be transferred to a NW. The first objective of this study was to determine the prevalence of relevant early complications (RECs) within the first 24 h on a normal ward. The secondary objective was to determine the prevalence of RECs in the subgroup of included patients who underwent partial pancreaticoduodenectomy.

Results: A total of 10,273 patients were included in this study. The prevalence of RECs was 0.50% (confidence interval [CI] 0.40-0.60%), with the median length of stay in the PACU before the patient's first transfer to a NW being 285 min (interquartile range 210-360 min). In the subgroup of patients who underwent partial pancreaticoduodenectomy (n = 740), REC prevalence was 1.1% (CI = 0.55-2.12%).

Conclusion: Based on a medical case-by-case assessment, it is possible to select patients who after a PACU stay of only up to 12 h have a low risk of emergency readmission to an ICU within the 24 h following the transfer to the NW. Continued research will be needed to further improve transfer decisions in such low-risk subgroups.

Background: Day-case laparoscopic cholecystectomy (DCLC) has gained traction globally due to its benefits, including shorter hospital stays, reduced costs, and enhanced patient experience. While concerns about patient safety, particularly related to bleeding and bile duct injury persist, the literature supports the efficacy and advantages of DCLC highlighting the need for its wider adoption in healthcare settings to optimise resources and improve patient outcomes.

Methods: This was a literature review that aims to assess the feasibility and safety of day-case laparoscopic cholecystectomy for symptomatic gallstone patients, focusing on incidence and aetiology of unexpected admissions and readmissions, as well as conversion-to-open rates. PubMed was searched for all studies focusing on DCLC between 2014 and 2024. The timeframe was specifically selected to identify recent trends and practices in this evolving field. By focusing on this specific period, the review aims to provide a comprehensive analysis of current practices, emerging trends, and the evolving standard of care in this area.

Results: This review highlights that the main causes of unexpected admission post DCLC were postoperative nausea, vomiting, and pain, while the implementation of anaesthetic pathways notably increased day-case rates. Studies addressing complication rates postoperatively consistently found no significant difference between day-case and in-patient procedures.

Conclusions: DCLC for symptomatic gallstone patients is supported by research as safe and effective, with high success rates and patient satisfaction. Studies show minimal complications and acceptable readmission rates, suggesting that DCLC can be the standard approach for selective patients, improving outcomes and healthcare efficiency.

Purpose: Frailty is common in surgical patients and is closely associated with postoperative outcomes.

Aims: This study employed bibliometric methods to summarize and analyze research related to frailty and surgery, comprehensively analyzing the research structure and providing visualized maps.

Methods: This study analyzed the volume of publications, countries, institutions, authors, journals, references, and keywords related to perioperative frailty in the Web of Science Core Collection from 1978 to 2024. Visual bibliometric analyses were conducted from multiple perspectives, including collaboration networks, citation analysis, and keyword clustering.

Results: From 1978 to 2024, 21,879 authors from 95 countries and regions published 4,119 papers on perioperative frailty in 973 journals worldwide. The United States has the most publications, while Italy has the highest degree of international collaboration. The University of California System has the highest number of publications. The University of Kansas Medical Center is the institution with the highest centrality. The top nine authors in terms of publication volume are all from the USA. Bowers Christian A. is the most prolific author. The Journal of Vascular Surgery is the journal with the most publications. Current research directions include preoperative risk assessment of frailty, the relationship between frailty and postoperative complications, elderly frailty, and the relationship between frailty and sarcopenia. Research hotspots include risk stratification, postoperative delirium, the elderly, and sarcopenia.

Conclusion: This study has identified the research hotspots and trends in perioperative frailty. Our findings will enable researchers to understand this field's knowledge structure better and identify future research directions.

Background: Delayed gastric emptying (DGE) is one of the most common reasons for morbidity after pancreatoduodenectomy. The technical characteristics of anastomosis that could be affected by surgeon may offer a relevant chance to improve postoperative DGE rates. We investigated the effect of a technical modification of gastrojejunostomy after the classical pancreaticoduodenectomy on DGE.

Materials and methods: A total of 161 patients underwent classical pancreaticoduodenectomy (with 20-40 percent antrectomy) due to pancreatic adenocarcinoma at the Department of General Surgery, Marmara University, School of Medicine Hospital, from February 2019 to May 2023, and those who met the inclusion criteria were enrolled. One hundred twenty patients had undergone classical end-to-side gastrojejunostomy (Classical GJ group), and 41 had undergone Marmara-Yegen cutting side-to-side gastrojejunostomy (M-Yc group). DGE was defined according to the International Working Group on Pancreatic Surgery, and postoperative DGE rates of both groups were compared. In addition, multivariate analysis was performed to identify possible independent predictive factors for DGE.

Results: The total incidence of DGE was 31% in the Classical GJ group and 17% in the (M-Yc group). Although there was no significant difference between the groups regarding DGE and DGE grades (p = 0.1), DGE was distinctly lower in the M-Yc GJ group. In multi-variant analysis, Clavien-Dindo grade 3a and above postoperative complication was determined as independent predictors for DGE.

Conclusions: We tried to explain the mechanism of DGE in terms of anatomical configuration. The incidence and severity of DGE decreased in patients who underwent M-Yc GJ.

Objectives: This study aimed to assess the diagnostic performance of a support vector machine (SVM) algorithm for acute cholecystitis and evaluate its effectiveness in accurately diagnosing this condition.

Methods: Using a retrospective analysis of patient data from a single center, individuals with abdominal pain lasting one week or less were included. The SVM model was trained and optimized using standard procedures. Model performance was assessed through sensitivity, specificity, accuracy, and AUC-ROC, with probability calibration evaluated using the Brier score.

Results: Among 534 patients, 198 (37.07%) were diagnosed with acute cholecystitis. The SVM model showed balanced performance, with a sensitivity of 83.08% (95% CI: 71.73-91.24%), a specificity of 80.21% (95% CI: 70.83-87.64%), and an accuracy of 81.37% (95% CI: 74.48-87.06%). The positive predictive value (PPV) was 73.97% (95% CI: 65.18-81.18%), the negative predictive value (NPV) was 87.50% (95% CI: 80.19-92.37%), and the AUC-ROC was 0.89 (95% CI: 0.85 to 0.93). The Brier score indicated well-calibrated probability estimates.

Conclusion: The SVM algorithm demonstrated promising potential for accurately diagnosing acute cholecystitis. Further refinement and validation are needed to enhance its reliability in clinical practice.

Purpose: It has reported that the prevalence of frailty in patients with pancreatic cancer is 45%. The number of patients with pancreatic cancer is increasing, and within this cohort, patients often suffer from impaired activities of daily living (ADLs). This study aimed to examine the association between perioperative Barthel Index (BI) scores, a validated measure of ADLs, and survival outcomes after pancreatectomy for pancreatic cancer.

Methods: We analyzed the data of 201 patients who underwent pancreatectomy for pancreatic cancer between 2010 and 2020. Preoperative and postoperative ADLs were assessed using the BI (range: 0-100; higher scores indicated greater independence). A preoperative or postoperative BI score ≤ 85 was defined as an impairment of perioperative ADLs. Cox proportional hazards regression was used to calculate the hazard ratios (HRs) after adjusting for potential confounders.

Results: Among the 201 patients, 14 (7.0%) had a preoperative BI score ≤ 85 and 50 (25%) had a postoperative BI score ≤ 85. Impairment of perioperative ADLs was independently associated with shorter overall survival (multivariable HR: 2.66, 95% confidence interval [95%CI]: 1.75-4.03, P < 0.001), cancer-specific survival (multivariable HR: 2.64, 95%CI: 1.15-4.25, P < 0.001), and recurrence-free survival (multivariable HR: 1.94, 95%CI: 1.08-3.50, P = 0.021).

Conclusion: Impairment of perioperative ADLs is associated with poor prognosis following pancreatectomy for pancreatic cancer. The maintenance and improvement of perioperative ADLs could play an important role in providing favorable long-term outcomes in patients with pancreatic cancer.

Background: We review and analyze research on the application of machine learning (ML) and deep learning (DL) models to lymph node metastasis (LNM) prediction in patients with T1 colorectal cancer (CRC). Predicting LNM before radical surgery is important in patients with T1 CRC. However, current surgical treatment guidelines are limited. LNM prediction using ML or DL may improve predictive accuracy. The diagnostic accuracy of LNM prediction using ML- and DL-based models for patients with CRC was assessed.

Methods: We performed a comprehensive search of the PubMed, Embase, and Cochrane databases (inception to April 30th of 2022) for studies that applied ML or DL to LNM prediction in T1 CRC patients specifically to compare with histopathological findings and not related to radiological aspects.

Results: 33,199 T1 CRC patients enrolled across seven studies with a retrospective design were included. LNM was observed in 3,173 (9.6%) patients. Overall, the ML- and DL-based model exhibited a sensitivity of 0.944 and specificity of 0.877 for the prediction of LNM in patients with T1 CRC. Six different types of ML and DL models were used across the studies included in this meta-analysis. Therefore, a high degree of heterogeneity was observed.

Conclusions: The ML and DL models provided high sensitivity and specificity for predicting LNM in patients with T1 CRC, and the heterogeneity between studies was significant. These results suggest the potential of ML or DL as diagnostic tools. However, more reliable algorithms should be developed for predicting LNM before surgery in patients with T1 CRC.

Background: Pancreatic Ductal Adenocarcinoma (PDAC) primarily affects older individuals with diminished physiological reserves. The Modified 5-Item Frailty Index (mFI-5) is a novel risk stratification tool proposed to predict postoperative morbidity and mortality. This study aimed to validate the mFI-5 for predicting surgical outcomes in patients undergoing pancreatoduodenectomy (PD) for PDAC.

Methods: Our retrospective PDAC database included patients who underwent PD between 2014 and 2023. Patients were stratified by mFI-5 scores (0 best - 5 worst), which assess preoperative CHF, diabetes mellitus, history of COPD or pneumonia, functional health status, and hypertension requiring medication. Associations between mFI-5 scores and outcomes, including postoperative complications and mortality, were analyzed using logistic regression, Cox proportional hazards models, and Kaplan-Meier survival analysis.

Results: Among 250 PDAC patients undergoing PD, 142 (56.8%) had mFI-5 scores ≤ 1, and 25 (10%) had scores ≥ 3. No patients had scores > 4. Higher mFI-5 scores correlated with older age (p < 0.001) and tobacco use (p = 0.036). Multivariate analysis identified age (RR 1.02, p = 0.038), ASA class (ASA III; RR 2.61, p < 0.001; ASA IV; RR 2.63, p = 0.026), and moderate alcohol consumption (RR 0.56, p = 0.038) as frailty predictors. An mFI-5 score > 2 independently associated with higher mortality (HR 2.08, p = 0.026). Median overall survival was significantly lower for patients with mFI-5 scores > 2 than for those with scores ≤ 2 (21.3 vs. 42.1 months, p = 0.022).

Conclusions: The mFI-5 is a valuable tool for predicting postoperative morbidity and mortality in PDAC patients undergoing PD. Integrating frailty assessment into preoperative evaluations can enhance patient selection and surgical outcomes. Future research should focus on incorporating frailty assessments into surgical planning and patient management to improve outcomes in this vulnerable population.