Second hit phenomenon: existing evidence of clinical implications.

The last two decades extensive research evidence has been accumulated regarding the pathophysiology of trauma and the sequelae of interventions that follow. Aim of this analysis has been to collect and categorise the existing data on the so-called "second hit" phenomenon that includes the biochemical and physiologic alterations occurring in patients having surgery after major trauma. Articles were extracted from the PubMed database and the retrieved reports were included in the study only if pre-specified eligibility criteria were fulfilled. Moreover, a constructed questionnaire was utilised for quality assessment of the outcomes. Twenty-six articles were eligible for the final analysis, referring to a total of 8262 patients that underwent surgery after major trauma. Sixteen retrospective clinical studies including 7322 patients and 10 prospective ones, including 940 patients were evaluated. Several variables able to reproduce a post-operative second hit were identified; mostly related to pulmonary dysfunction, coagulopathy, fat or pulmonary embolism, and the inflammatory immune system. Indicative conclusions were extracted, as well as the need for further prospective randomised trials. Suggestions on the content and the rationale of future studies are provided.

Ipsilateral floating second metatarsal and ankle fracture dislocation: complications and outcome of a rare type of injury.

Lisfranc fracture dislocations are complex lesions which, when combined with additional trauma of the ankle and foot region, create a difficult to treat injury pattern. This article presents a case of a patient with Lisfranc fracture dislocation combined with metatarsophalangeal dislocation of the second toe and ankle fracture-dislocation. The sequence of medical acts and complications included: reduction of dislocations, cast immobilization, compartment syndrome and fasciotomies, external fixator application, fasciotomies closure, and final internal fixations. The following examinations were performed: radiography, computed tomography (CT), and intracompartmental pressure measurement. Despite the compartment syndrome incidence, which was effectively managed, the patient regained an ankle- and foot-pain-free full range of motion. Although this is an isolated case of a rare injury, several recommendations can be made. Early CT scan should be used for injuries of the Lisfranc joints to fully assess the distorted anatomy of the midfoot and forefoot, which is essential for preoperative planning, medicolegal issues, and prognosis of the injury. The use of a spanning external fixator, especially in complex injuries as the one described, should be preferred to cast immobilization and should be performed as a priority surgical procedure early on in the patient's admission. The development of compartment syndrome should be monitored and intracompartmental pressures measured especially in unconscious patients. There should be a high degree of suspicion for early complications in complex fracture patterns, even if the initial clinical assessment is reassuring.

Application of bone morphogenetic proteins to femoral non-unions: a 4-year multicentre experience.

Fracture non-unions often complicate orthopaedic trauma. BMPs (bone morphogenetic proteins) are currently considered the most appealing osteoinductive agents. Applications of BMP-7 since January 2004 were prospectively recorded in a multicentre registry of aseptic femoral non-unions. The study included 30 patients who had undergone a median of 1 revision operation before BMP-7 application and who were followed up for a median 24 months. In 23/30 cases the application of BMP-7 was combined with revision of the fixation, and in 12 it was combined also with autograft. Non-union healing was verified in 26/30 cases in a median period of 6 months. No adverse events were associated with BMP-7 application. Our case series supports the safety and efficacy of BMP-7 in femoral non-unions. Multicentre networks and systematic, long-term follow-up of patients may improve understanding of this promising osteoinductive bone substitute.

An undiagnosed bilateral anterior shoulder dislocation after a seizure: a case report.

INTRODUCTION: Late diagnoses of orthopaedic injuries after epileptic crisis are a matter of concern. The rarity of correlation between seizure and specific trauma incidences such as bilateral anterior shoulder dislocation, may lead to improper estimation of the patient's clinical state, wrong treatment and unpleasant complications. CASE PRESENTATION: We report the rare case of an undiagnosed bilateral anterior shoulder dislocation in an epileptic young man of 25 years of age. The way of treatment is described as well as the treating alterations, if needed, because of the 3 weeks delay from injury. The article focuses on the reasons of the non-diagnosis at the first place and proposes a possible explanation for the mechanism of the injury. This is the second documented case of a missed bilateral anterior shoulder dislocation following a seizure and the first one that was treated not earlier than 3 weeks post injury. CONCLUSION: Although not a matter of routine, the high importance of radiographic control after seizure, in case of suspicion, is concluded. The etiology causing the injury shall not disorientate the doctors from the possible diagnoses.

Acute renal failure due to rhabdomyolysis after proximal humerus fracture associated with axillary artery rupture.

The anatomical proximity of axillary artery to the humeral head makes it quite vulnerable to blunt trauma during shoulder injury. Axillary artery rupture and prolonged ischemia may lead to rhabdomyolysis and acute renal failure. Herein we present a case of a patient who sustained proximal humerus fracture associated with axillary artery rupture and acute renal failure due to rhabdomyolysis.

The use of freeze-dried cancelous allograft in the management of impacted tibial plateau fractures.

The purpose of this study is to assess the behaviour of freeze-dried cancellous allograft used for supporting the reconstructed articular surface in impacted tibial plateau fractures. Freeze-dried cancellous allograft was used as metaphyseal defect filling agent in twenty-three patients (fifteen men and eight women, mean age 53 years), who suffered impacted tibial plateau fractures. According to Schatzker classification, ten fractures were classified as type II, six as type III, three as type V and four as type VI. All fractures were treated with open reduction-internal fixation after restoration of the tibial plateau surface and insertion of freeze-dried allograft chips for subchondral support. The mean follow-up was 13 months. The clinical and radiological outcome was assessed according to the modified Rasmussen system. The freeze-dried allograft incorporated soundly in all cases within 12 weeks from surgery and no complications that could relate to the graft were recorded. Freeze-dried allograft has specific advantages in comparison to autograft or other grafts and the results of the present study justify its use in the treatment of impacted tibial plateau fractures.