One size does not fit all: Impact of hand size on ease of use of instruments for minimally invasive surgery.

BACKGROUND: Consideration of ergonomic factors is important for the practice of safe and efficient minimally invasive surgery (MIS). Surgeons with smaller glove sizes have previously been reported to have increased difficulties with some minimally invasive instruments. We aim to investigate hand anthropometrics and their relationship to surgeon comfort when using MIS instruments. METHODS: Male and female surgeons from two centres were surveyed on their experience of handling MIS instruments and images obtained of the dorsal and palmar aspects of their dominant hand. Photographs of hands were transformed to calibrated coordinates to enable anthropometric measurements of finger length and width as well as palm width and hand span photogrammetrically. Surgeon-perceived discomfort, fatigue, pressure points and techniques to mitigate difficulty handling instruments were compared to hand measurements. RESULTS: Questionnaires were completed by 58 surgeons; 20 (34%) were consultants, 17 (29%) were women. Glove size ranged from 6 to 8 (median 7.5). Male participants had significantly larger hands than females in all measured dimensions. Female surgeons and those with smaller finger and hand dimensions were significantly more likely to experience difficulty or discomfort across a range of variables when using MIS instruments. CONCLUSIONS: Surgeons with smaller hands reported increased problems handling MIS instruments. This represents an issue of equity in surgery, with women being more significantly affected than men. Hand size varies greatly between surgeons and anthropometric variability should be considered in design of MIS instruments.

Validation of the Adapted Clavien-Dindo in Trauma (ACDiT) Classifications in Medical and Surgical Management of Acute Diverticulitis.

OBJECTIVES: To validate the adapted Clavien-Dindo in trauma (ACDiT) tool as a novel outcome measure for patients with acute diverticulitis managed both operatively and nonoperatively. BACKGROUND: Complications following diverticulitis are difficult to classify because no traditional tools address patients managed both operatively and nonoperatively. The ACDiT grading system-graded from 0 to 5b-is applied in this manner but has not yet been validated for this patient group. METHODS: We performed a 5-year observational study of patients with acute diverticulitis at a safety-net hospital. Baseline demographics and hospitalization data were collected. ACDiT scores were assigned, and validation was undertaken by comparing scores with hospital-free days, and verifying that higher scores were associated with known risk factors for poor outcomes. Inverse probability weighted propensity scores were assigned for surgical management, and inverse probability weighted regression analysis was used to determine factors associated with ACDiT ≥ grade 2. RESULTS: Of 260 patients, 188 (72%) were managed nonoperatively. Eighty (31%) developed a complication; 73 (91%) were grades 1 to 3b. Higher grades correlated inversely with hospital-free days (rs = -0.67, P < 0.0001) for all patients and for nonoperative (rs = -0.63, P < 0.0001) and operative (rs = -0.62, P < 0.0001) patients. Hinchey 2 to 3 and initial operative management had higher odds of having a complication of ACDiT ≥ grade 2. CONCLUSION: The ACDiT tool was successfully applied to acute diverticulitis patients managed operatively and nonoperatively, is associated with known risk factors for adverse outcomes. ACDiT may be considered a meaningful outcome measure for comparing strategies for acute diverticulitis.

Effects of ethnicity and socioeconomic status on surgical outcomes from inflammatory bowel disease.

PURPOSE: Evidence suggests that ethnicity and socioeconomic status of patients with chronic diseases influence their healthcare outcomes. The aim of this study was to assess the impact of these factors on the surgical outcome of patients with inflammatory bowel disease (IBD) over a 15-year period. METHODS: A retrospective observational study investigated IBD patients operated on at an NHS Trust between 2000-2015, with follow-up data until 2020. Logistic regression models were used to determine the relationship between ethnic minority background and Index of Multiple Deprivation (IMD) on outcomes including requirement for intra-abdominal surgery, permanent stoma, re-do surgery and surgical complications, accounting for age, gender, smoking history and biologic treatment. RESULTS: There were 1,620 patients (56.7% ulcerative colitis (UC) and 43.3% Crohn's disease (CD)). Median age was 32 years, and 49.6% were female. Patients with an ethnic minority background accounted for 20.6%. Within 5 years of first presentation, 369 patients required intra-abdominal surgery, 95 permanent stomas and 107 re-do surgery. For CD patients, younger age at diagnosis, female patients, those with an ethnic minority background, higher IMD quintile, smoking history and biologic treatment were more likely to have intra-abdominal surgery. Ethnic minority background and higher IMD score were further associated with surgical complications for CD but not UC patients. CONCLUSION: Ethnic minority status and socioeconomic deprivation were associated with worse surgical outcomes within our cohort of IBD patients. These findings may stimulate discourse regarding the strategic planning of equitable healthcare services.

Rectus sheath catheter analgesia versus standard care following major abdominal surgery: An observational study of 911 patients.

BACKGROUND: It is unknown whether rectus sheath catheter (RSC) continuous infusion of local anaesthetic is superior to standard post-operative opiate analgesia following major abdominal surgery. Previous audit in our Trust had suggested RSC was very effective and reduced opiate analgesia use. We aimed to see if this was maintained as the technique became more widespread comparing clinical outcomes and post-operative opiate analgesia requirements between patients who had RSCs and those that did not following major abdominal surgery over a 32-month period. METHODS: A retrospective observational study investigated patients who had major abdominal surgery at a single centre in the UK between January 2018 and August 2020. Placement of RSCs was at the discretion of the surgical team according to their own personal choice. All patients having the procedure in both an elective and non-elective setting have been included in this study, including patients requiring higher level care after emergency surgery. Clinical outcomes and post-operative opiate analgesia requirements (oral and intravenous) were analysed using multivariate logistic regression models adjusting for American Association of Anesthesiologists (ASA) grade and type of surgery (emergency vs elective and open vs laparoscopic). RESULTS: There were 911 patients; 276/911 (30.3%) RSC and 635/911 (69.7%) non-RSC. Median age was 64 (52-74) years; 51.6% were male. In the adjusted models, RSC was associated with a reduced likelihood of serious complications (OR 0.49 (95% CI 0.33, 0.72); p < 0.001) and lower length of stay in ICU (OR 0.95 (95% CI 0.91, 0.99); p = 0.029). RSC was not associated with reduced post-operative opiate analgesia use. There were 3/276 (1.1%) adverse events following RSC placement during the period of data collection. CONCLUSIONS: Clinical outcomes may be superior for patients following major abdominal surgery when RSCs are placed for post-operative analgesia but uncertainty remains. This paper highlights the difficulty with retrospective non-selected data in answering this question. High quality prospective randomised data are required to determine the effects on clinical outcomes and post-operative opiate analgesia requirements.

Injury by knife crime amongst children is associated with socioeconomic deprivation: an observational study.

PURPOSE: Children who live in areas of socioeconomic deprivation may be at higher risk of being victims of violent crime such as knife wounds. The current study investigated whether socioeconomic disparity was associated with higher risk of knife crime. METHODS: An observational study included patients aged ≤ 17 years at a UK Major Trauma Centre injured by knife trauma from 2016 to 2022. Indices of deprivation were recorded according to the zip code of residence and compared with those of all of England. These included Index of Multiple Deprivation (IMD); income; employment; education and skills; health and disability; crime; barriers to housing and services; living environment; and Income Deprivation Affecting Children Index (IDACI). RESULTS: There were 139 patients (96% male) with median age of 16 years. When compared with the whole of England, patients had worse indices of IMD (p = 0.021); income (p < 0.001); employment (p < 0.001); education and skills (p < 0.001); health and disability; and IDACI (p < 0.001). There were no significant differences in indices of crime, barriers to housing and services or living environment. CONCLUSIONS: Paediatric knife injury was associated with poor socioeconomic status in multiple domains. Focussed efforts to address socioeconomic disparities should be a priority as a public health measure for vulnerable children.

Circulating Tumour Cells as Prognostic Biomarkers in Colorectal Cancer: A Systematic Review.

Despite therapeutic advances, colorectal cancer (CRC) is still one of the deadliest cancers, partly due to local recurrence and metastatic disease. Tumour cells that spread by gaining access to peripheral blood are called circulating tumour cells (CTCs). These may be present before there are any clinical signs, but can be detected within blood samples. CTCs from patients with CRC may be isolated in a laboratory for characterization and multiple analyses. In this review, we focus on the prognostic potential of CTCs detection, by evaluating the reported progress and applications of such analyses. Our search found 77 relevant studies that reported CTC detection in CRC. Both cell count and features were reported as promising prognosis biomarkers. Since CTCs are rare and can lose their differentiation, new tools are being developed to improve detection. CTCs may have potential as prognostic biomarkers for CRC in terms of survival prediction, anticipating chemotherapy resistance, and surgical planning. CTCs are not yet used in clinical practice, and further investigations are required in order to better frame their practical value.

Microcirculatory Impairment Is Associated With Multiple Organ Dysfunction Following Traumatic Hemorrhagic Shock: The MICROSHOCK Study.

OBJECTIVES: To assess the relationship between microcirculatory perfusion and multiple organ dysfunction syndrome in patients following traumatic hemorrhagic shock. DESIGN: Multicenter prospective longitudinal observational study. SETTING: Three U.K. major trauma centers. PATIENTS: Fifty-eight intubated and ventilated patients with traumatic hemorrhagic shock. INTERVENTIONS: Sublingual incident dark field microscopy was performed within 12 hours of ICU admission (D0) and repeated 24 and 48 hours later. Cardiac output was assessed using oesophageal Doppler. Multiple organ dysfunction syndrome was defined as Serial Organ Failure Assessment score greater than or equal to 6 at day 7 post injury. MEASUREMENTS AND MAIN RESULTS: Data from 58 patients were analyzed. Patients had a mean age of 43 ± 19 years, Injury Severity Score of 29 ± 14, and initial lactate of 7.3 ± 6.1 mmol/L and received 6 U (interquartile range, 4-11 U) of packed RBCs during initial resuscitation. Compared with patients without multiple organ dysfunction syndrome at day 7, patients with multiple organ dysfunction syndrome had lower D0 perfused vessel density (11.2 ± 1.8 and 8.6 ± 1.8 mm/mm; p < 0.01) and microcirculatory flow index (2.8 [2.6-2.9] and 2.6 [2.2-2.8]; p < 0.01) but similar cardiac index (2.5 [± 0.6] and 2.1 [± 0.7] L/min//m; p = 0.11). Perfused vessel density demonstrated the best discrimination for predicting subsequent multiple organ dysfunction syndrome (area under curve 0.87 [0.76-0.99]) compared with highest recorded lactate (area under curve 0.69 [0.53-0.84]), cardiac index (area under curve 0.66 [0.49-0.83]) and lowest recorded systolic blood pressure (area under curve 0.54 [0.39-0.70]). CONCLUSIONS: Microcirculatory hypoperfusion immediately following traumatic hemorrhagic shock and resuscitation is associated with increased multiple organ dysfunction syndrome. Microcirculatory variables are better prognostic indicators for the development of multiple organ dysfunction syndrome than more traditional indices. Microcirculatory perfusion is a potential endpoint of resuscitation following traumatic hemorrhagic shock.

Prehospital haemostatic dressings for trauma: a systematic review.

BACKGROUND: Haemorrhage is a major cause of mortality and morbidity following both military and civilian trauma. Haemostatic dressings may offer effective haemorrhage control as part of prehospital treatment. AIM: To conduct a systematic review of the clinical literature to assess the prehospital use of haemostatic dressings in controlling traumatic haemorrhage, and determine whether any haemostatic dressings are clinically superior. METHODS: MEDLINE and EMBASE databases were searched using predetermined criteria. The reference lists of all returned review articles were screened for eligible studies. Two authors independently undertook the search, performed data extraction, and risk of bias and Grading of Recommendations, Assessment, Development and Evaluation quality assessments. Meta-analysis could not be undertaken due to study and clinical heterogeneity. RESULTS: Our search yielded 470 studies, of which 17 met eligibility criteria, and included 809 patients (469 military and 340 civilian). There were 15 observational studies, 1 case report and 1 randomised controlled trial. Indications for prehospital haemostatic dressing use, wound location, mechanism of injury, and source of bleeding were variable. Seven different haemostatic dressings were reported with QuikClot Combat Gauze being the most frequently applied (420 applications). Cessation of bleeding ranged from 67% to 100%, with a median of 90.5%. Adverse events were only reported with QuikClot granules, resulting in burns. No adverse events were reported with QuikClot Combat Gauze use in three studies. Seven of the 17 studies did not report safety data. All studies were at risk of bias and assessed of 'very low' to 'moderate' quality. CONCLUSIONS: Haemostatic dressings offer effective prehospital treatment for traumatic haemorrhage. QuikClot Combat Gauze may be justified as the optimal agent due to the volume of clinical data and its safety profile, but there is a lack of high-quality clinical evidence, and randomised controlled trials are warranted. LEVEL OF EVIDENCE: Systematic review, level IV.

Prehospital immune responses and development of multiple organ dysfunction syndrome following traumatic injury: A prospective cohort study.

BACKGROUND: Almost all studies that have investigated the immune response to trauma have analysed blood samples acquired post-hospital admission. Thus, we know little of the immune status of patients in the immediate postinjury phase and how this might influence patient outcomes. The objective of this study was therefore to comprehensively assess the ultra-early, within 1-hour, immune response to trauma and perform an exploratory analysis of its relationship with the development of multiple organ dysfunction syndrome (MODS). METHODS AND FINDINGS: The immune and inflammatory response to trauma was analysed in 89 adult trauma patients (mean age 41 years, range 18-90 years, 75 males) with a mean injury severity score (ISS) of 24 (range 9-66), from whom blood samples were acquired within 1 hour of injury (mean time to sample 42 minutes, range 17-60 minutes). Within minutes of trauma, a comprehensive leukocytosis, elevated serum pro- and anti-inflammatory cytokines, and evidence of innate cell activation that included neutrophil extracellular trap generation and elevated surface expression of toll-like receptor 2 and CD11b on monocytes and neutrophils, respectively, were observed. Features consistent with immune compromise were also detected, notably elevated numbers of immune suppressive CD16BRIGHT CD62LDIM neutrophils (82.07 x 106/l ± 18.94 control versus 1,092 x 106/l ± 165 trauma, p < 0.0005) and CD14+HLA-DRlow/- monocytes (34.96 x 106/l ± 4.48 control versus 95.72 x 106/l ± 8.0 trauma, p < 0.05) and reduced leukocyte cytokine secretion in response to lipopolysaccharide stimulation. Exploratory analysis via binary logistic regression found a potential association between absolute natural killer T (NKT) cell numbers and the subsequent development of MODS. Study limitations include the relatively small sample size and the absence of data relating to adaptive immune cell function. CONCLUSIONS: Our study highlighted the dynamic and complex nature of the immune response to trauma, with immune alterations consistent with both activation and suppression evident within 1 hour of injury. The relationship of these changes, especially in NKT cell numbers, to patient outcomes such as MODS warrants further investigation.

Post-traumatic stress disorder amongst surgical trainees: An unrecognised risk?

BACKGROUND: Experiences of actual/threatened death or serious injury to patients are commonplace in surgery. Pathological symptoms following stress may lead to Acute Stress Reaction (ASR) and Post-Traumatic Stress Disorder (PTSD). PTSD symptoms of insomnia, anger, poor concentration, hyper-vigilance and exaggerated startle have implications for patient safety. The current study investigates the prevalence of occult, untreated psychological morbidity amongst surgical trainees. METHODS: A web-based survey of UK surgical trainees based upon the Impact of Events Scale-Revised (IES-R) was distributed using social media platforms and email. A score of ≥33 was indicative of ASR or PTSD (the former lasting <1 month, the latter >1 month). Additional questions concerned chronicity of symptoms, mentorship, team-working and access to support. RESULTS: For 167 returned surveys the mean age was 32.7 (SD 3.6) years; 102/167 (61%) were male. Mean years in training were 6.1 (SD 3.6). Median IES-R score was 14 (IQR 7-23.5). Of 144 respondents who answered about stress symptoms, 23/144 (16%) had IES-R score ≥ 33; 6 of these had symptoms < 1 month (suggesting ASR); 17 had symptoms lasting >1 month (suggesting PTSD). Those with IES-R ≥ 33 group were more likely to have repeated years of training, and have witnessed severe pain, traumatic injury, and acute haemorrhage. Seven with score ≥ 33 had sought support. CONCLUSION: Occult psychological morbidity amongst surgical trainees may be higher than in the general population. Recognition and management of this risk is important for the mental health of trainees and the safety of patients.

Towards research combat readiness: prepared, prospective and preapproved.

Research drives the advancement of medical knowledge during war, but planning and execution are too slow to enable early data acquisition. Future conflicts are likely to be shorter and more dispersed, requiring innovation to avoid missing out on the crucial early stages. To seize the initiative, we suggest that a collection of preapproved research studies be designed, stored and maintained within the medical command structure so that they are ready for immediate implementation at the onset of future conflicts, even during the most kinetic early phases of deployment.

Real-time point of care microcirculatory assessment of shock: design, rationale and application of the point of care microcirculation (POEM) tool.

BACKGROUND: Despite over a decade of research and technological advances, sublingual microcirculatory monitoring has not yet reached clinical utility. Offline analysis is time consuming and occurs away from the patient. A system to assess the microcirculation at the point of care is desirable. We present a novel 5-point grading system (the point of care microcirculation (POEM) scoring system) that can be used at the point of care during non-invasive sublingual microcirculatory monitoring. METHODS: The POEM score is an ordinal scale from 1 (worst) to 5 (best), based on a composite assessment of flow and heterogeneity of four individual sublingual video-microscopy clips. Thirty-two healthcare professionals were trained in how to assign POEM scores. Following training they assigned scores to five test sequences (each consisting of four video clips). They were blinded to clinical status. Inter-user consistency and agreement were assessed using intra-class correlation coefficient (ICC) analysis. In addition, blinded expert scores for 68 video clips were compared to offline computer analysis using traditional microcirculatory parameters including total vessel density (TVD), perfused vessel density (PVD), proportion of perfused vessels (PPV), microcirculatory flow index (MFI) and microcirculatory heterogeneity index (MHI). The time taken to assign each was recorded. RESULTS: Participants showed good inter-rater consistency (ICC 0.83, 95 % CI 0.626, 0.976) and agreement (ICC 0.815, 95 % CI 0.602, 0.974) for assigned POEM scores. Expert scoring of videos correlated with offline values for PVD (R 2 = 0.39; p < 0.05), PPV (R 2 = 0.71; p < 0.001), MFI (R 2 = 0.75; p < 0.001), and MHI (R 2 = 0.68; p < 0.001). POEM scores took less time to assign than conventional offline computer analysis (2 minutes versus 44 minutes). CONCLUSION: We present for the first time a novel 5-point ordinal scale of microcirculatory flow and heterogeneity that can be used at the point of care. It has minimal inter-user variability amongst healthcare professionals after just 1 hour of training. POEM scores take a short time to assign, and correspond well to traditional offline computer-analyzed parameters.

Scanning and War: Utility of FAST and CT in the Assessment of Battlefield Abdominal Trauma.

OBJECTIVE: To determine utilization and accuracy of focused assessment with sonography for trauma (FAST) and computed tomography (CT) in a mature military trauma system to inform service provision for future conflicts. BACKGROUND: FAST and CT scans undertaken by attending radiologists contribute to surgical decision making for battlefield casualties at the Joint Force, Role 3 Medical Treatment Facility at Camp Bastion (R3), Afghanistan. METHODS: Registry data for abdominally injured casualties treated at R3 from July to November 2012 were matched to radiological and surgical records to determine diagnostic accuracy for FAST and CT and their influence on casualty management. RESULTS: A total of 468 casualties met inclusion criteria, of whom 85.0% underwent FAST and 86.1% abdominal CT; 159 (34.0%) had abdominal injuries. For detection of intra-abdominal injury, FAST sensitivity (Sn) was 0.56, specificity (Sp) 0.98, positive predictive value (PPV) 0.87, negative predictive value (NPV) 0.90, and accuracy (Acc) 0.89. For CT, Sn was 0.99, Sp 0.99, PPV 0.96, NPV 1.00, and Acc 0.99. Forty-six solid organ injuries were identified in 38 patients by CT; 17 were managed nonoperatively. A further 61 patients avoided laparotomy after CT confirmed extra-abdominal wounds only. The negative laparotomy rate was 3.9%. CONCLUSIONS: FAST and CT contribute to triage, guide surgical management, and reduce nontherapeutic laparotomy. When imaging is available, these data challenge current doctrine about inadvisability of nonoperative management of abdominal injury after combat trauma.