Preventing iatrogenic ureteral injury in colorectal surgery: a comprehensive and systematic review of the last 2 decades of literature and future perspectives

Iatrogenic ureteral injury (IUI) during colorectal surgery is a rare complication but related to a serious burden of morbidity. This comprehensive and systematic review aims to provide a critical overview of the most recent literature about IUI prevention techniques in colorectal surgery. We performed a comprehensive and systematic review of studies published from 2000 to 2022 and assessed the use of techniques for ureteral injury prevention and intraoperative localization. 26 publications were included, divided into stent-based (prophylactic/lighted ureteral stent and near-infrared fluorescent ureteral catheter [PUS/LUS/NIRFUC]) and fluorescent dye (FD) groups. Costs, the percentage and number of IUIs detected, reported limitations, complication rates and other outcome points were compared. The IUI incidence rate ranged from 0 to 1.9% (mean 0.5%) and 0 to 1.2% (mean 0.3%) in the PUS/LUS/NIRFUC and FD groups, respectively. The acute kidney injury (AKI) and urinary tact infection (UTI) incidence rate ranged from 0.4 to 32.6% and 0 to 17.3%, respectively, in the PUS/LUS/NIRFUC group and 0-15% and 0-6.3%, respectively, in the FD group. Many other complications were also compared and descriptively analyzed (length-of-stay, mortality, etc.). These techniques appear to be feasible and safe in select patients with a high risk of IUI, but the delineation of reliable guidelines for preventing IUI will require more randomized controlled trials.

Enhancing visualization and guidance in general surgery: a comprehensive and narrative review of the current cutting-edge technologies and future perspectives

BACKGROUND

In the last decade, there has been a great effort in developing new technologies to enhance surgical visualization and guidance. This comprehensive and narrative review aimed to provide a wide and extensive overview of the current state of the art on this topic and their near-future perspectives linked to the development of artificial intelligence (AI), by focusing on the most recent and relevant literature.

METHODS

A comprehensive and narrative review of the literature was performed by searching specific terms on PubMed/MEDLINE, Scopus, and Embase databases, assessing the current state of the art on this topic.

RESULTS

Fluorescence-guided surgery, contrast-enhanced ultrasound (CEUS), ultra-high frequency ultrasound (UHFUS), photoacoustic imaging (PAI), and augmented reality (AR) are boosting the field of image-guided techniques as the rapid development of AI in surgery is promising a more automated decision-making and surgical movements in the operating room.

CONCLUSION

Fluorescence-guided surgery, CEUS, UHFUS, PAI, and AR are becoming crucial to give surgeons a new level of information during the intervention, with the right timing and sequence, and represent the future of surgery. As many more controlled studies are needed to validate the employment of these technologies, the next generation of surgeons must become more familiar with the basics of AI to better incorporate new tools into the daily surgical practice of the future.

General Surgery Training and One Year of COVID-19. What Has Been the Impact on Residents' Operating Room Surgical Activity? A Report From an Italian Academic Hospital

BACKGROUND

In the last year and a half, the COVID-19 pandemic has put great pressure on the healthcare systems of many countries, Italy included, leading to a reorganization of hospital activities and a dramatic reduction in surgical activity. Our study aimed to evaluate, from a quantitative and qualitative perspective, the impact of this reduction on the formation of surgery residents at the Academic Hospital of Udine.

METHODS

We compared the resident's surgical activity during the pandemic year (March 2020-2021) with the one during the pre-pandemic year, declining the surgical procedures by timing, type, and complexity and categorizing the residents by postgraduate year (PGY) and surgical role.

RESULTS

Our analysis highlighted how the main reductions occurred in the elective and medium complexity surgery due to the procrastination of benign pathologies such as hernias, cholelithiasis, and hemorrhoids, which also appeared to be the more frequent cases where the residents are first operators. On the other hand, the residents of the last PGY still maintained a good exposure to neoplasm and high complexity interventions, which are cardinal aspects in the last year of formation.

CONCLUSIONS

These results mostly confirmed the critical points noted by the resident surgeons themselves, highlighting however the specific impact on different PGY and surgical activities, offering a starting point to better understand how to challenge the negative effect that the COVID-19 pandemic has had on the surgical resident formation.

Predictive Factors for Drain Placement After Laparoscopic Cholecystectomy

Purpose

Currently, surgical drainage during a laparoscopic cholecystectomy (LC) is still placed in selected patients. Evidence of the non-beneficial effect of the surgical drain comes from studies with a heterogeneous population. This preliminary study aims to identify any clinical, demographic, or intraoperative predictive factors for a surgical drain placement during LC as the first step to identify population for a prospective randomized study.

Method

The study was conducted in a single referral center and academic hospital between 2014 and 2018. Patients who underwent unconverted LC were divided into two groups: Group A (drain) and Group B (no drain). We explored baseline, preoperative, intraoperative characteristics, and postoperative outcomes.

Results

Between 409 patients who underwent LC: 90 (22%) patients were in Group A (drain). Age >64 years, male sex, cholecystitis, Charlson comorbidity index (CCI) ≥ 1, experienced surgeon, intraoperative technical difficulties, need for an additional trocar, operative time >60 min, and estimated blood loss >10 ml were predictive factors at univariate analysis. While at multivariate analysis, cholecystitis (odds ratio [OR]: 2.8, 95% CI:1.5–5.1; p < 0.001), CCI ≥ 1 (OR:1.9, 95% CI:1.0–3.5; p = 0.05), intraoperative technical difficulties (OR: 3.6, 95% CI:1.8–6.2; p < 0.001), need of an additional trocar (OR: 2.5, 95% CI: 1.4–4.4; p < 0.005), and estimated blood loss >10 ml (OR: 3.0, 95% CI:1.7–5.3; p < 0.0001) were predictive factors for a surgical drain placement during LC.

Conclusions

This study identified predictive factors that currently drive the surgeons to a surgical drain placement after LC. Randomized prospective studies are needed to define the use of drain placement in these selected patients.

Cholecystectomy in the elderly: clinical outcomes and risk factors

AIM OF THE STUDY

Recent decades have seen a steady increase in the number of elderly patients undergoing cholecystectomy surgery. The objective of this study is to evaluate clinical outcomes in this cohort of patients and to identify any predictive factors correlative with adverse outcomes arising in the postoperative period.

METHOD

A retrospective study was conducted regarding patients aged ≥65 years who underwent cholecystectomy surgery. The independent variables considered to be related to the patient were: age, gender, co-morbidities, and severity of cholelithiasis. The clinical variables were type of procedure, length of stay and hospitalization. The outcomes considered were mortality, re-intervention, transfer to intensive care and post-operative complications.

RESULTS

778 patients with an age between 65 and 74 and 508 patients with an age above 75 were reviewed. With the increase of age, patients who underwent cholecystectomy presented greater co-morbidity, more accesses in emergency, more cases of cholecystitis, which led to a higher number of interventions in open surgery. Considering postoperative outcomes: the need for intensive care, postoperative complications and mortality significantly increase in older patients. Negative predictive factors are the presence of co-morbidities, emergency access and cholecystectomy performed in open.

CONCLUSIONS

Elderly patients undergoing cholecystectomy are an increased surgical risk group in particular because of the presence of co-morbidities and because of the frequent need to perform an emergency procedure often for complicated lithiasis pathology. This implies a special attention towards these patients, and towards those over 75 considering, when possible, alternative treatments such as percutaneous drainage.

KEY WORDS

Cholecystectomy, Elderly, Outcomes, Risk factors.

How to resume safe access to a medical simulation center at the time of COVID-19 pandemic: The proposal of a protocol from a university institution in North-Eastern Italy

INTRODUCTION

The Covid-19 global pandemic has suspended thousands of clinical education programs around the world. Also in Italy, as in the rest of the world, frontal teaching activities and internships in the medical field have been suspended. At the university hospital of Udine (North-Eastern Italy) it was decided to strengthen the use of simulation in all training stages to get over the block of training activities.

METHODS

A protocol has been drawn up with the aim of providing training in safety for every student of the degree courses in medicine and health area and for doctors in residency training. In this way it was possible to carry out training sessions with a maximum of 6 students engaged in the simulation activities offered by the Center (3D) virtual cadaver, laparoscopic pelvic trainer stations, ultrasound laboratory, microsurgery, etc.). The key points of the protocol were represented by i) internet booking of the training activity; ii) respect of safety measures (hand hygiene, safe distance, restricted total number of presences, constant use of the surgical mask) and iii) reorganization of the material and cleaning of the rooms.

RESULTS

Our educational strategy allowed to resume training activity maintaining adequate levels of safety for students and teachers. Applying our protocol, it was possible to guarantee safe access to our Medical Simulation Center (MSC) to a total of about 1400 students from different course of study during the period between June 2020 and February 2021.

CONCLUSIONS

Our protocol could represent a practical tool in the management of resuming the activity at a MSC.

Assessment of hepatic steatosis based on needle biopsy images from deceased donor livers

BACKGROUND

Assessment of hepatic steatosis (HS) before transplantation requires the pathologist to read a graft biopsy. A simple method based on the evaluation of images from tissue samples with a smartphone could expedite and facilitate the liver selection. This study aims to assess the degree of HS by analysing photographic images from liver needle biopsy samples.

METHODS

Thirty-three biopsy-images were acquired with a smartphone. Image processing was carried out using ImageJ: background subtraction, conversion to HSB colour space, segmentation of the biopsy area and evaluation of statistical features of Hue, Saturation, Brightness, Red, Green, and Blue channels on the biopsy area. After feature extraction, correlations were made with gold standard HS percentage assessed at two levels (frozen-section vs. glass-slide). Sensitivity, specificity, and accuracy were calculated for each feature.

RESULTS

Correlations were found for H, S, R. The sensitivity, specificity and accuracy of the final classifier based on the K* algorithm were 94%, 92%, 94%.

LIMITATIONS

Accuracy assessment was performed considering macrovesicular steatosis on specimens with mostly < 30% HS.

CONCLUSIONS

The steatosis assessment based on needle biopsy images, proved to be an effective and promising method. Deep learning approaches could also be experimented with a larger set of images This article is protected by copyright. All rights reserved.

Association between the donor to recipient ICG-PDR variation rate and the functional recovery of the graft after orthotopic liver transplantation: A case series

Background

Despite current advances in liver transplant surgery, post-operative early allograft dysfunction still complicates the patient prognosis and graft survival. The transition from the donor has not been yet fully understood, and no study quantifies if and how the liver function changes through its transfer to the recipient. The indocyanine green dye plasma disappearance rate (ICG-PDR) is a simple validated tool of liver function assessment. The variation rate between the donor and recipient ICG-PDR still needs to be investigated.

Materials and methods

Single-center retrospective study. ICG-PDR determinations were performed before graft retrieval (T1) and 24 hours after transplant (T2). The ICG-PDR relative variation rate between T1 and T2 was calculated to assess the graft function and suffering/recovering. Matched data were compared with the MEAF model of graft dysfunction.

Objective

To investigate whether the variation rate between the donor ICG-PDR value and the recipient ICG-PDR measurement on first postoperative day (POD₁) can be associated with the MEAF score.

Results

36 ICG-PDR measurements between 18 donors and 18 graft recipients were performed. The mean donor ICG-PDR was 22.64 (SD 6.35), and the mean receiver’s ICG-PDR on 1st POD was 17.68 (SD 6.60), with a mean MEAF value of 4.51 (SD 1.23). Pearson’s test stressed a good, linear inverse correlation between the ICG-PDR relative variation and the MEAF values, correlation coefficient -0.580 (p = 0.012).

Conclusion

The direct correlation between the donor to recipient ICG-PDR variation rate and MEAF was found. Measurements at T1 and T2 showed an up- or downtrend of the graft performance that reflect the MEAF values.

The rare Ogilvie's Syndrome in pregnancy. How to manage? A case report and literature review

Acute colonic pseudo-obstruction, or Ogilvie's syndrome (OS), is a complication in gynaecology and obstetrics. Its occurrence during pregnancy is rare, redefining the therapeutic decision-making and treatment options. In this review we describe the case of a 37-year-old pregnant patient who developed OS at the 30th week of gestation. A laparotomy with colonic decompression was performed. Foetal condition, regularly monitored throughout the hospital stay, remained normal. The patient experienced an uncomplicated, natural delivery at 40 weeks. A comprehensive literature search, describing the occurrence of OS during pregnancy, was conducted. We identified six cases of OS arising during pregnancy. Demographic, clinical, diagnostic and therapeutic features were analysed. Non-surgical management is generally the first-line option, with intravenous drug administration, rectal and nasogastric tube positioning and colonoscopic decompression the treatments of choice. Surgical decompression in usually performed in cases of failure of the first-line treatments. Including our own experience, in all cases, neither maternal nor foetal mortality was reported. A conservative approach is mandatory as first-line treatment, but when prompt resolution is not achieved, a multidisciplinary team, involving the gynaecologist/obstetrician, the surgeon, the radiologist and the intensivist is mandatory to avoid diagnostic delays, thereby reducing morbidity and mortality rates.