Development and Validation of Two-Step Prediction Models for Postoperative Bedridden Status in Geriatric Intertrochanteric Hip Fractures.

Patients with intertrochanteric hip fractures are at an elevated risk of becoming bedridden compared with those with intraarticular hip fractures. Accurate risk assessments can help clinicians select postoperative rehabilitation strategies to mitigate the risk of bedridden status. This study aimed to develop a two-step prediction model to predict bedridden status at 3 months postoperatively: one model (first step) for prediction at the time of admission to help dictate postoperative rehabilitation plans; and another (second step) for prediction at the time before discharge to determine appropriate discharge destinations and home rehabilitation programs. Three-hundred and eighty-four patients were retrospectively reviewed and divided into a development group (n = 291) and external validation group (n = 93). We developed a two-step prediction model to predict the three-month bedridden status of patients with intertrochanteric fractures from the development group. The first (preoperative) model incorporated four simple predictors: age, dementia, American Society of Anesthesiologists physical status classification (ASA), and pre-fracture ambulatory status. The second (predischarge) model used an additional predictor, ambulation status before discharge. Model performances were evaluated using the external validation group. The preoperative model performances were area under ROC curve (AUC) = 0.72 (95%CI 0.61-0.83) and calibration slope = 1.22 (0.40-2.23). The predischarge model performances were AUC = 0.83 (0.74-0.92) and calibration slope = 0.89 (0.51-1.35). A decision curve analysis (DCA) showed a positive net benefit across a threshold probability between 10% and 35%, with a higher positive net benefit for the predischarge model. Our prediction models demonstrated good discrimination, calibration, and net benefit gains. Using readily available predictors for prognostic prediction can assist clinicians in planning individualized postoperative rehabilitation programs, home-based rehabilitation programs, and determining appropriate discharge destinations, especially in environments with limited resources.

Silent iatrogenic pseudoaneurysm after intertrochanteric fracture fixation with proximal femoral nailing and cerclage wiring: case report and review of literature.

Pseudoaneurysm is a rare complication after intertrochanteric fracture fixation. Herein, we present a rare case of late development of a pseudoaneurysm with silent clinical symptoms. The case was a 91-year-old woman treated with proximal femoral nailing and cerclage wiring. Postoperatively, the patient was able to ambulate with a walker without abnormal symptoms. During the follow-ups, the radiographic images showed progressive cortical scalloping on the medial femoral shaft. Ultrasonography revealed a yin-yang sign, and a CT scan confirmed a pseudoaneurysm at the profunda femoris artery (PFA). In this case, many possible causes of pseudoaneurysm were hypothesized. We showed that the excessive displaced, long spiral pattern of an intertrochanteric fracture, which was irreducible by a closed technique, is the risk of a PFA injury. An atherosclerotic vessel was seen in preoperative radiography, indicating poor vessel elasticity which may be a risk of vessel tear during fracture reduction using multiple reduction instruments in excessive displaced fracture. Moreover, over-penetration when drilling should not be overlooked. We also discuss the predisposing factors, surgical techniques which may lead to this type of PFA injury and summarize the literature of pseudoaneurysms related to intertrochanteric fracture fixation.

Danger zone for screw placement in minimally invasive plate osteosynthesis (MIPO) of diaphyseal fractures of forearm: a cadaveric study.

PURPOSES: To identify the anatomical relationship between neurovascular structures and screws and to evaluate the danger zone of screw placement during minimally invasive plate osteosynthesis (MIPO) technique following the volar approach for the radius and the subcutaneous approach for the ulna in diaphyseal forearm fractures. METHODS: Sixteen cadaveric forearms were fixed with a 3.5-mm, 14-hole, locking compression plate (LCP) using the MIPO technique with a volar approach of the radius. Two locking screws were fixed at each end via two separated incisions, and the remaining ten  screws were inserted percutaneously. The same MIPO technique was performed at the ulna with the subcutaneous approach. The forearms were then dissected to identify any damage to or direct contact between the screws and the radial artery (RA), the superficial branch of the radial nerve (SBRN), the posterior interosseous nerve (PIN), and the dorsal cutaneous branch of the ulnar nerve (DCBUN). The distances from the screws to the structures at risk, as well as the radial and ulnar length, were measured. RESULTS: The average lengths of the radius and ulna were 24.74 cm and 25.93 cm, respectively. On the volar aspect of the radius, the danger zones of RA and SRN were between 15.26 and 81.24% of the length of the radius from the radial styloid. The zone of PIN injury at the posterior aspect of the radius was between 41.45 and 81.24% of the length of the radius from the radial styloid. Meanwhile, the danger zone of DCBUN was between 12.21 and 27.23% of the ulnar length from the ulnar styloid. CONCLUSION: Based on our study, the percutaneous screw fixation in MIPO for the treatment of diaphyseal fractures of the forearm is a dangerous procedure, especially for the volar approach of the entire radius and the subcutaneous approach of the distal ulna.

Comparison of Bone Mineral Density at Hip and Lumbar Spine in Patients with Femoral Neck Fractures and Pertrochanteric Fractures.

BACKGROUND: Geriatric hip fractures, including femoral neck and pertrochanteric fractures, are common nowadays, which is related to increasing numbers of elderly people worldwide. Osteoporosis is an important risk factor associated with hip fractures. This study aimed to describe the association of hip fractures and osteoporosis at different BMD measurement sites and determine any differences between these two types of hip fracture. MATERIAL AND METHODS: A retrospective study conducted in a university hospital in the south of Thailand enrolled 223 patients aged over 50 years with low-energy trauma hip fractures. Each patient had undergone dual energy x-ray absorptiometry (DXA) within 2 weeks of injury. T-scores were recorded for the total hip, femoral neck and lumbar spine areas and classified as normal, osteopenia and osteoporosis according to WHO osteoporosis diagnostic criteria. RESULTS: The highest proportion of T-scores in the osteoporotic range were registered at the femoral neck (68.6%) compared to total hip (52.9%) and lumbar spine (47.7%). At least 31.4% of patients were in the non-osteoporotic range. No significant differences were found at all sites of BMD measurement between the two types of fracture. CONCLUSIONS: 1. At least 1/3 of patients with geriatric hip fractures had their T-scores in the normal to oste-ope-nic range. 2. BMD in different areas is not different between types of hip fractures.

Septic arthritis following femoral neck fracture: A case report.

INTRODUCTION: Femoral neck fracture is common in the elderly, especially in the era of aging populations. Septic arthritis of the hip after femoral neck fracture is a rare complication. There are limited reports on this complication especially in patients without a severe medical condition and there is no consensus on the method of treatment of this complication. CASE PRESENTATION: A 75-year-old male had right hip pain for two weeks after falling on his right hip. The patient was diagnosed as pathological fracture with hematologic malignancy. He was scheduled for bipolar hemiarthroplasty. However, an intraoperative finding found that the hip joint was filled with pus. The treatment was successful with a two-stage procedure. The first stage was implantation of an antibiotic cement spacer and the second stage was total hip replacement. CONCLUSION: Septic arthritis following femoral neck fracture is a complication which requires special attention for the diagnosis and treatment. Increasing hip pain or the developing signs of infection in patients awaiting surgery may indicate infection in the hip. The two-stage procedure is the treatment of choice in this condition.