Bijendra Patel

Simulation and surgical training

The aim of this review was to outline current forms of surgical simulation and methods of assessing technical skills using these forms of simulation. To review this subject, a literature search was done using key words ‘assessment’, ‘simulation’, ‘surgery’, ‘technical skills’ and ‘virtual reality’. Simulation in surgery has several forms, inorganic (synthetic & computer) and organic (animal or cadaver). Surgical simulation is a mode of training which is promising and may be effective. Technical errors in the simulated environment do not have clinical consequences and does not have a morbidity or mortality. We must ensure that the competent skills learnt in the simulation environment are translated to the real environment. This can be achieved if the same assessment tools are used in both environments. Surgical training is entering a new era, with increased scrutiny and an evolving work and training environment. We as surgical teachers must ensure that the surgeons of the future are as competent as or better than their predecessors using these new modes of training which we have access to.

Meta-analysis of the use of glyceryl trinitrate ointment after haemorrhoidectomy as an analgesic and in promoting wound healing

INTRODUCTION Glyceryl Trinitrate (GTN) ointment has been used to treat anal fissure and pain relief in haemorrhoids, but the value of its use post-haemorrhoidectomy as an analgesic and in wound healing is unclear. The side effect of headache has often been an associated problem. Therefore, a meta-analysis of randomised controlled trials was carried out investigating the role of GTN post-haemorrhoidectomy as an analgesic, its role in would healing and the unwanted incidence of headache. METHOD A structured literature search from 1966 to 2009, both paper and online, with no language barrier was carried out. 760 papers were identified and 5 randomised control trials which met the entry criteria were included in this study. RESULTS A total of 333 patients were included in the meta-analysis. The results revealed that GTN ointment was statistically significant in reducing pain on Day 3 and 7 compared to the placebo group. Day 3 shows a pain score of - 1.51 (p value of 0.029) and Day 7 by - 1.66 (p value of 0.014) respectively. However, it was not significant in reducing pain on Day 1. The Odds ratio for wound healing after GTN treatment at 3 weeks was 3.57 (P < 0.0001) when compared to the placebo group. Side effect of headache was not statistically significant. CONCLUSION This meta-analysis has shown that GTN ointment used post-haemorrhoidectomy has a significant analgesic effect in the intermediate time period (ie. Days 3-7). It also significantly improved wound healing at 3 weeks.

Core biopsy versus FNAC for palpable breast cancers. Is image guidance necessary

The aim of this study was to assess the efficacy of free-hand percutaneous core biopsy (FHCB) and to determine the role of fine needle aspiration cytology (FNAC) as diagnostic tools for palpable radiologically-suspicious breast lumps. This retrospective study was based on reviewing the clinical records of all patients diagnosed as having breast cancer between January 1999 and December 2000 and patients who had benign lesions, but suspicious breast imaging at triple assessment. Absolute sensitivity of FHCB for diagnosing cancer in palpable lesions was 98.7% compared with 51.3% for FNAC. The difference in the sensitivity of FHCB and FNAC was statistically significant (P<0.005, Wilcoxon matched pair test). Since 94.8% of radiologically-suspicious lumps were shown to be cancers, we advocate FHCB for all patients presenting with radiologically suspicious palpable lumps to our breast clinic. We also conclude that the sensitivity of FHCB for the diagnosis of malignancy in palpable radiologically-suspicious breast lesions is so high that image-guidance is unnecessary.

Emergency room surgical workload in an inner city UK teaching hospital

BackgroundEmergency admissions may account for over 50% of surgical admissions. The impact on service provision and implications for training are difficult to quantify. We performed a cohort study to analyse these workload patterns.MethodsData on emergency room (ER) surgical admissions over six months was collected including patient demographics, referral sources, diagnosis, operation and length of stay and analysed according to sub-speciality and age-groups.ResultsThere were 1392 (median age 41 (IQR 28–60) years, M:F = 1.7:1) emergency surgical admissions over six months; 45% were under 40 years of age and 48% patients self-referred to the ER. The commonest diagnoses were abscesses (11%), non-specific abdominal pain (9.7%) and neuro-trauma (9.6%). The median length of stay was 4 (IQR 2–8) days; with older (>80 years) patient staying significantly longer than those <40 years of age (median 8 vs 2 two days, P < 0.0001, Kruskal-Wallis test). Vascular patients remained in hospital longer than trauma or general surgery patients (median 14 vs 3 days, P < 0.0001, Kruskal-Wallis test). A high proportion (43.5%) of the patients required operative intervention and service implications of various diagnoses and operative interventions are highlighted.ConclusionWith the introduction of shortened training period in Europe and World over, trainees may benefit from increased exposure to trauma and surgical emergencies. Resource planning should be based on more comprehensive, prospective data such as these.

Outcomes of laparoscopic Kasai portoenterostomy for biliary atresia: A systematic review

AIMS Biliary atresia (BA) is a rare disease for which mainstay of treatment consists of open Kasai portoenterostomy. The aim of this review was to assess the outcomes of laparoscopic Kasai portoenterostomy, which offers potential benefits of minimally invasive surgery. Outcomes identified were postoperative cholangitis rates, incidence of adhesions at subsequent liver transplantation, native liver survival rates and actuarial survival rates. METHODS A comprehensive systematic literature search was conducted in the PubMed and Cochrane databases using the keywords hepatic portoenterostomy, biliary atresia and laparoscopy. Robotic cases were excluded. RESULTS Ten studies (n=149 patients) were included in this review. The mean age at the time of operation was 66 (range 14-119) days. The mean operative time was 261 (range 120-662) minutes. The rate of postoperative cholangitis was 34% (range 11%-50%). The mean native liver survival rate was 57% (range 33%-78%) at 6months and 47% (range 8%-76%) at 2years. Mean actuarial survival rate was 87% (range 54%-100%) at 2years. Subsequent adhesions were reported in 4 patients. Two patients had dense adhesions and 2 had no adhesions. CONCLUSIONS Although laparoscopic Kasai portoenterostomy is a feasible operation, outcomes in terms of native liver survival rates and actuarial survival rates are unfavourable compared to conventional surgery. There is no evidence that laparoscopic Kasai is associated with fewer adhesions at subsequent liver transplantation. LEVEL OF EVIDENCE III. TYPE OF STUDY Treatment study.

Acquisition of fundamental laparoscopic skills: Is a box really as good as a virtual reality trainer?

BACKGROUND Laparoscopic surgery requires working in a three-dimensional environment with a two-dimensional view. Skills such as depth perception, hand to eye co-ordination and bimanual manipulation are crucial to its efficacy. AIM To compare the efficiency of training in laparoscopic skills on a VR simulator with a traditional box trainer. METHOD Twenty medical students were recruited. An initial training session on the relevant anatomy and steps of a laparoscopic cholecystectomy was given. Baseline skills were recorded using a pre-training laparoscopic cholecystectomy on the VR trainer. Parameters measured were: (1) total time taken (mins); (2) number of movements right and left instrument; (3) path length (cms) of right and left instrument was recorded. Ten students trained on a VR simulator, and ten on a box trainer, for three hours each. The box trainer group exercises were based on the Royal College of Surgeons core laparoscopic skills course, and the VR trainer exercises were based on the Simbionix LapMentor basic skills tasks. Following this both groups were reassessed by a laparoscopic cholecystectomy on the VR trainer. RESULTS Both groups showed improvement in all measured parameters. A student T-test at 95% confidence interval showed no statistically significant difference between the two groups pre and post training. CONCLUSION Both the VR and box trainer are effective in the acquisition of laparoscopic skills.

Objective assessment of skills acquisition during laparoscopic surgery courses.

Background. The aim of this prospective study is to objectively assess the acquisition of skills of trainees attending laparoscopic surgery courses. Methods. Thirty-four junior surgical trainees had their laparoscopic skills assessed before and after attending 1 of 3 separate runs of 3-day core skills in laparoscopic surgery course. Nine control trainees were also included who did not attend the course. Three virtual tasks (camera navigation, hand–eye coordination, and 2-handed maneuver) were used from a virtual reality simulator (Simbionix) for assessment. Camera navigation was assessed by completion time and maintenance of horizontal view, whereas the other 2 tasks were assessed by completion time, path length (both hands), and the number of movements (both hands). A composite score of overall performance was calculated by combining all the 12 parameters. Results. The course significantly (P < 0.001) improved 91% of the junior trainees’ precourse laparoscopic skills. Around 70% to 85% of the participants had improvement in skills in all the parameters following the course. The significant improvements were seen in 10 out of 12 task-specific parameters (P ≤ .004) except path length of the left hand. No significant improvement in skills was seen in any 1 of the 12 parameters for the control participants except for a slight reduction in performance matrics. Foundation and core trainees had acquired significantly (P = .02) more skills (23% improvement) than the specialist trainees (8% improvement). Overall acquired skills did not differ significantly in terms of age, sex, or dominant hand of trainees. Conclusion. Objective validated methods can be used to demonstrate course efficacy in addition to providing participants with an insight into their skills. Junior trainees with little or no previous experience benefit the most from such courses irrespective of their age, sex, and dominant hand.

Faster simulated laparoscopic cholecystectomy with haptic feedback technology

Virtual reality simulators have been gradually introduced into surgical training. One of the enhanced features of the latest virtual simulators is haptic feedback. The useful-ness of haptic feedback technology has been a matter of controversy in recent years. Previous studies have assessed the importance of haptic feedback in executing parts of a procedure or basic tasks, such as tissue grasping. The aim of this study was to assess the role of haptic feed-back within a structured educational environment, based on the performance of junior surgical trainees after undergoing substantial simulation training.

Image-guided surgery for anal fistula in a 0.5T interventional MRI unit.

To determine whether MR‐guided anorectal surgery is feasible, and to develop techniques for MR‐guided anal fistula surgery.

The incidence of peripheral arterial embolism in association with a patent foramen ovale (right-to-left shunt)

Objectives The aim of this study was to examine a cohort of patients who had suffered an arterial embolism to see whether a patent foramen ovale (PFO) was an identifiable cause. Design This study was conducted in two parts; a retrospective limb involving an audit of patient records over a period of 10 years, and a prospective limb including selected patients from that audit to search for a PFO using an agitated saline test with transcranial Doppler ultrasound monitoring of the anterior cerebral artery. Data on patients with peripheral vascular disease were collected using a structured questionnaire. Setting A clinical vascular department. All patients were seen in the vascular outpatients clinic. Participants Patients who had been identified from a retrospective search based on the headline diagnosis of arterial embolus. Collected data on the 71 patients revealed that 75% had predisposing factors for DVT, 70% were male smokers, and 84.4% had a significant past history of vascular symptoms. Main outcome measures Whether or not patients identified as having a possible PFO actually had one on objective testing with transcranial Doppler assessment of the cerebral circulation with an agitated saline solution. Results Fifteen patients who were suspected of having a PFO were selected from these 71 patients; 12 of these were found to have no PFO on testing, and three had already undergone a percutaneous PFO closure. Conclusion The incidence of a PFO in this small study group is no higher than that found in the general population (3/15, 20%). There was high prevalence of male smokers with associated predisposing factors leading to a DVT.