Various injury severity scores exist for trauma; it is known that they do not correlate accurately to military injuries. A promising anatomical scoring system for blast pelvic and perineal injury led to the development of an improved scoring system using machine-learning techniques. An unbiased genetic algorithm selected optimal anatomical and physiological parameters from 118 military cases. A Naïve Bayesian (NB) model was built using the proposed parameters to predict the probability of survival. Ten-fold cross validation was employed to evaluate its performance. Our model significantly out-performed Injury Severity Score (ISS), Trauma ISS, New ISS and the Revised Trauma Score in virtually all areas; Positive Predictive Value 0.8941, Specificity 0.9027, Accuracy 0.9056 and Area Under Curve 0.9059. A two-sample t-test showed that the predictive performance of the proposed scoring system was significantly better than the other systems (p<0.001). With limited resources and the simplest of Bayesian methodologies we have demonstrated that the Naïve Bayesian model performed significantly better in virtually all areas assessed by current scoring systems used for trauma. This is encouraging and highlights that more can be done to improve trauma systems not only for the military, but also in civilian trauma

The UK Military Trauma Registry was searched for all cases of primary bilateral lower limb amputation sustained over 6-years between March 2004 and March 2010. There were 1694 UK military patients injured or killed during this six-year study period. Forty-three of these (2.8%) were casualties with bilateral lower limb amputations. All were men injured in Afghanistan by Improvised Explosive Devices. Six casualties were in vehicles when they were injured with the remaining 37 (80%) patrolling on foot. The mean New Injury Severity Score was 48.2 (SD 13.2). Nine patients also lost an upper limb (triple amputation); no patients survived loss of all four limbs. Six patients (14%) sustained an open pelvic fracture. Perineal/genital injury was a feature in 19 (44%) patients, ranging from unilateral orchidectomy to loss of genitalia and permanent requirement for colostomy and urostomy. The mean requirement for blood products was 66 units (SD=41.7). The minimum transfusion requirement was 8 units and the greatest was a patient requiring a total of 193 units of blood products. Our findings detail the severe nature of these injuries together with the massive surgical and resuscitative efforts required to firstly keep patients alive and secondly reconstruct and prepare them for rehabilitation

The October 2012 Trauma Roundup³⁶⁰ looks at: which patients die from pelvic ring fractures; monolateral distraction osteogenesis; surgical management of pelvic and peroneal blast injuries; weekend warriors at risk of going AWOL; early experience with the locking attachment plate; and fibula nailing - an alternate, and viable technique.

This study defines the patterns of perineal injury due to blast currently seen on operations. It refines our team-based surgical strategies of surgical resuscitation provides an evidence base for a perineal debridement - colonic diversion didactic on the Military Operational Surgical Training (MOST) course. The Joint Theatre Trauma Registry (JTTR) held at RCDM was examined from 1 January 2003 to 31 December 2010. Data abstracted included patient demographics, mechanism of injury, injury severity score (ISS), treatment, management, length of stay (LOS) and outcomes. Of 4807 military trauma patients, 118 (2.5%) had a recorded perineal injury, 56 died (48% all IED). Pelvic fractures were identified in 63 (53%) of which 17 (27%) survived. Mortality rates were significantly different between the combined perineal & pelvic fracture group compared to pelvic fracture & perineal injuries alone (41% & 18% respectively, p = 0.0001). Mean ISS for all patients was 41.03. Those with a pelvic fracture had a significantly higher ISS than those with perineal injuries alone (29.53 vs. 51.06, p = 0.0001). Recorded early antibiotic use was significantly more frequent in survivors (p = 0.0119). A literature review demonstrated the benefits of early feeding, emergent diversion, antibiotics, daily washouts and radical early debridement. Combined perineal injuries & pelvic fractures have the highest rate of mortality. Early aggressive management is essential to survival in this cohort. Our recommendations are immediate faecal diversion, aggressive initial debridement & early enteral feeding (in the deployed ITU after first surgery). These findings will enable the rapid provision of an evidence based training schedule to be incorporated into our pre-deployment surgical training program (MOST) to improve surgical team preparation and patient outcomes

The open blast fracture of the pelvis is considered to be the most severe injury within the spectrum of battlefield trauma. We report our experience of 29 consecutive patients who had sustained this injury in Afghanistan between 2008 and 2010. Their median new injury severity score (NISS) was 41 (8 to 75), and mean blood requirement in the first 24 hours was 60.3 units (0 to 224). In addition to their orthopaedic injury, six had an associated vascular injury, seven had a bowel injury, 11 had a genital injury and seven had a bladder injury. In all, eight fractures were managed definitively with external fixation and seven required internal fixation. Of those patients who underwent internal fixation, four required removal of metalwork for infection. Faecal diversion was performed in nine cases. The median length of hospital stay following emergency repatriation to the United Kingdom was 70.5 days (5 to 357) and the mean total operating time was 29.6 hours (5 to 187). At a mean follow-up of 20.3 months (13.2 to 29.9), 24 patients (82.8%) were able to walk and 26 (89.7%) had clinical and radiological evidence of stability of the pelvic ring.

As a result of the increase in terrorism, injuries that were previously confined exclusively to warfare can now occur anywhere, with civilian surgeons who are involved in trauma care potentially required to manage similar injuries. Our study demonstrates that the management of this injury pattern demands huge resources and significant multidisciplinary input. Given the nature of the soft-tissue injury, we would advocate external fixation as the preferred management of these fractures. With the advent of emerging wound and faecal management techniques, we do not believe that faecal diversion is necessary in all cases.

Aim: The purpose of this study is to explore the experience of a consultant orthopaedic surgeon, and to quantitatively describe the learning curve for hip arthroscopy. Introduction: Arthroscopic surgery in orthopaedics is a well established procedure for both diagnostic and therapeutic purposes. Unlike many other joint arthroscopies, hip arthroscopy has been delayed in its development. It was first pioneered by Burman in 1931, who under-took a study on cadavers, stating that ‘it is manifestly impossible to insert a needle between the head of the femur and the acetabulum’. Over several decades, this technique has developed considerably, but still remains a technically demanding and difficult procedure. The learning curve for hip arthroscopy has not previously been objectively quantified. Method: We prospectively reviewed the first 100 hip arthroscopies performed in the supine position between 1999 and 2004. Surgery was performed by a single experienced hip and knee consultant orthopaedic surgeon (FH). We assessed the operative time (traction time), surgeon comfort, patient satisfaction at 6 months and operative complications. This was analysed for consecutive blocks of 10 cases. Results of the first 10 and the remaining 90 cases, subsequently the first 20 and remaining 80 cases, and finally the first 30 and remaining 70 cases were compared for a difference. Results: The mean traction time was 55 minutes (range: 36–94 minutes). Mean surgeon comfort was 73% (range: 52–89%). 49% of patients reported an excellent outcome at 6 months follow – up. Only 8% of patients reported an unsatisfactory outcome. The main complications noted were chondral damage (6 cases) and perineal injuries (4 cases). There was a remarkable decrease in complications from the first 30 cases compared to the remaining 70 operations. 5 cases of chondral damage was noted in the first 30 cases, compared to 1 (1.4%) in the remaining 70 cases. The number of perineal injuries was noted to decrease from 3 cases in the first 30 operations to 1 (1.4%) in the subsequent 70 operations. There is an overall decrease in operative time over the 100 cases, representing a gradual learning process throughout. However, the fall from an average time of 75 minutes for the first 30 cases, to the average operative time of 30 minutes for the remaining 70 cases, is a significant learning process (40% fall in operative time). We thus, believe the learning curve to be 30 operations. Conclusion: We have demonstrated that there is a considerable fall in operative time when comparing the first 30 cases with the remaining 70 cases. This quantitative decrease is indicative of a rapid learning curve. This is further suggested by the remarkable fall in complications during this learning phase

Although arthroscopy of the hip is being carried out increasingly, little is known about the rate of associated complications. We describe a prospective study of 640 consecutive procedures in which a consistent technique was used. The overall complication rate was 1.6%. Complications, none of which was major or long-term, included transient palsy of the sciatic and femoral nerves, perineal injury, bleeding from the portal wounds, trochanteric bursitis and intra-articular breakage of the instrument. We believe that it is possible to undertake this operation safely using the technique described