A recent General Surgery digest,
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Study Type: Retrospective cohort study (national registry analysis)

Key Question: Does normothermic regional perfusion (NRP) or normothermic machine perfusion (NMP) confer superior graft survival in DCD liver transplantation compared to conventional super-rapid recovery with static cold storage?

Key Findings:

• Both SRR-NMP and NRP-SCS significantly reduced graft loss versus SRR-SCS (HR 0.54, 95%CI 0.32–0.92 and HR 0.42, 95%CI 0.29–0.61, respectively)
• No significant difference in graft or overall survival between NRP-SCS and SRR-NMP
• Adding NMP to NRP-procured livers conferred no additional survival benefit over NRP-SCS alone

Clinical Relevance: With DCD donation expanding under NHS Blood and Transplant strategy, this large dataset supports both NRP and NMP as equivalent, legitimate standards of care — informing UK centre-level decisions about procurement pathway investment.

Limitations: Retrospective registry design with surrogate-marker identification of NRP and back-to-base NMP introduces potential misclassification bias.

Study Type: Retrospective cohort study

Key Question: Does transfusion of Rh(D)-positive low-titer group O whole blood (LTOWB) carry a higher alloimmunisation risk than Rh(D)-negative component therapy in major trauma?

Key Findings:

• Alloantibody formation was low and comparable between groups: 3% (63/2,103) in LTOWB recipients vs 2% (32/1,428) in component therapy recipients
• Anti-D antibodies represented only 11% of alloantibodies detected in the LTOWB group vs 20% in the component group; anti-E was most common overall in LTOWB recipients (22%)
• Alloantibody formation was more frequent in Rh(D)-negative patients across both groups

Clinical Relevance: As UK major trauma centres explore LTOWB for pre-hospital and early in-hospital resuscitation, these data provide reassurance that immunohaematological risk is not meaningfully elevated compared with standard component therapy.

Limitations: Single-centre retrospective design with antibody screening limited to the inpatient period, likely underestimating true alloimmunisation incidence.

Study Type: Retrospective cohort study

Key Question: Does radial margin distance (RMD) using dual cutoffs of 0 mm and 1.0 mm better stratify prognosis after resection of perihilar cholangiocarcinoma than conventional margin-positive/negative classification?

Key Findings:

• Three-tier RMD classification (0 mm / >0–<1.0 mm / ≥1.0 mm) produced markedly different 5-year survival rates: 21.8%, 36.0%, and 78.5% respectively (p<0.001)
• 5-year recurrence rates followed the same gradient: 83.5%, 68.8%, and 23.9%; local recurrence rates were 63.0%, 37.0%, and 11.1%
• On multivariable analysis, both RMD 0 mm (HR 3.15) and RMD >0–<1.0 mm (HR 2.64) were independent predictors of poor overall survival versus ≥1.0 mm

Clinical Relevance: This supports adopting a 1.0 mm RMD threshold in histopathological reporting of perihilar cholangiocarcinoma resections, potentially informing adjuvant therapy decisions in UK HPB MDT discussions.

Limitations: Single-centre retrospective design limits generalisability.

Study Type: Scoping literature review

Key Question: Does AI/machine learning research in surgery adequately represent the ambulatory surgery centre (ASC) setting, where the majority of elective procedures occur?

Key Findings:

• Of 847 screened articles (2020–2025), fewer than 10 examined AI specifically in ASCs versus over 500 hospital-based studies — roughly a 50:1 disparity
• Existing ASC-focused AI research was limited to workflow/predictive analytics; no studies addressed intraoperative AI applications
• It remains unestablished whether AI tools validated in hospital settings perform equivalently in ASCs

Clinical Relevance: While directly US-focused, this has relevance to UK practice as NHS day-surgery units now deliver the majority of elective surgical volume, and AI tools developed in inpatient settings are increasingly being adopted without setting-specific validation.

Limitations: The scoping methodology and US-centric framing limit direct applicability to NHS day-surgery and independent sector treatment centre contexts.

Study Type: Population-based cohort study (nationwide Swedish registry data, 2006–2019)

Key Question: Does same-admission cholecystectomy, ERCP alone, or no intervention best prevent recurrent acute pancreatitis and gallstone-related complications after mild gallstone-related acute pancreatitis?

Key Findings:

• Recurrent acute pancreatitis occurred in 3.4% (cholecystectomy), 4.9% (ERCP only), and 17.5% (no intervention); adjusted hazard ratios versus cholecystectomy were 1.40 (95% CI 1.02–1.92) for ERCP and 6.06 (95% CI 4.85–7.56) for no intervention.
• ERCP-only risk of recurrence was concentrated in the 8–14 days post-discharge window; beyond 15 days, recurrence risk was comparable to cholecystectomy.
• Other gallstone complications (cholecystitis/choledocholithiasis) remained markedly higher after ERCP only (19.9%) and no intervention (16.3%) versus cholecystectomy (1.6%).

Clinical Relevance: This large registry study strongly reinforces NICE-aligned guidance for same-admission cholecystectomy, challenging the common UK practice of deferred surgery or ERCP as a standalone bridge strategy.

Limitations: Observational design limits causal inference, with likely selection bias influencing which patients received each intervention.

Study Type: Editorial / Commentary

Key Question: Should AI-generated correspondence replace personally authored letters in surgical professional culture?

Key Findings:

• The author argues that personally written letters carry relational and professional value that AI-generated text cannot replicate
• Authentic letter writing is framed as a form of mentorship, advocacy, and human connection within surgical communities
• Adoption of AI for routine correspondence risks eroding norms of personal accountability and professional relationship-building

Clinical Relevance: As AI writing tools become embedded in NHS clinical and academic workflows, surgical departments should consider institutional guidance on when AI-assisted correspondence is appropriate versus where personal authorship remains professionally and ethically important.

Limitations: Not applicable — this is an opinion piece without original data.

Study Type: Multicentre prospective RCT

Key Question: Does low IMA ligation (preserving the left colic artery) reduce anastomotic leak rates compared to high ligation in minimally invasive anterior resection for rectal cancer?

Key Findings:

• No significant difference in symptomatic anastomotic leak rates: 4.9% (low ligation) vs 6.0% (high ligation) (RR 0.82, 95% CI 0.31–2.13; P=.68)
• 30-day morbidity trended lower with low ligation (14.0% vs 22.0%; P=.08) but did not reach significance
• 12-month functional outcomes including LARS scores and major LARS rates were equivalent between groups

Clinical Relevance: This trial provides the strongest evidence to date that IMA ligation level does not meaningfully affect anastomotic leak risk, directly informing a common intraoperative decision in UK colorectal practice.

Limitations: The trial was likely underpowered to detect small but clinically meaningful differences in leak rates given the relatively low event numbers.

Study Type: RCT (multisite superiority trial; 10-year follow-up)

Key Question: Does vaginal mesh sacrospinous hysteropexy offer superior long-term outcomes compared to vaginal hysterectomy with uterosacral ligament suspension for uterovaginal prolapse?

Key Findings:

• Composite failure (retreatment, prolapse beyond hymen, or symptoms) was lower in the hysteropexy group at 10 years (40% vs 53%; aHR 0.64, 95% CI 0.41–1.00; P=0.05)
• No between-group differences in patient-reported urinary, bowel, or sexual function outcomes; both groups maintained sustained symptomatic improvement
• No clinically significant difference in complication rates; no additional durability advantage for hysteropexy was observed in years 6–10

Clinical Relevance: For UK gynaecological surgeons managing uterovaginal prolapse, this supports vaginal mesh hysteropexy as a durable, uterine-sparing alternative to hysterectomy, relevant given ongoing regulatory scrutiny of mesh use in the NHS.

Limitations: Approximately 36% attrition by the extended follow-up phase risks survivorship bias in long-term estimates.