Locking compression plate combined with medial buttress plate for the treatment of osteoporotic comminuted proximal humerus fractures / 中国骨伤

OBJECTIVE@#To explore clinical effect of lateral locking compression plate combined with medial buttress plate in treating osteoporotic comminuted fractures of proximal humerus.@*METHODS@#From May 2017 to December 2021, 12 patients with osteoporotic comminution of proximal humerus were treated by lateral locking compression plates combined with medial buttress plates, including 5 males and 7 females, aged from 55 to 78 years old, bone mineral density(BMD) less than -2.5 g/cm3, the time from injury to operation was from 2 to 6 days. According to Neer classification, 7 patients were type Ⅲ, 4 patients were type Ⅳ and 1 patient was type Ⅵ. Postoperative complications, fracture healing and internal fixation were observed and Constant-Murley score of shoulder joint was used to evaluate clinical effects at 6 months after operation.@*RESULTS@#Postoperative wound healed well at stage I. All patients were followed up from 6 to 18 months. Humeral head collapse and necrosis occurred in 1 patient and humeral head varus in 1 patient. No impact of shoulder joint, internal fixation loosening occurred. Constant-Murley score at 6 months ranged from 45 to 90 points, and 6 patients got excellent result, 3 good, and 3 poor.@*CONCLUSION@#Locking compression plate combined with medial buttress plate could effectively reconstruct medial humeral column support and enhance fracture stability, and receive satisfactory clinical results. However, no control group was established in this study, and function of shoulder joint has not been evaluated many times after operation, so it cannot dynamically reflect changes of shoulder joint function.

Operation for the treatment of radial head fracture with collapse of anterior articular surface / 中国骨伤

<p><b>OBJECTIVE</b>To evaluate clinical outcomes of fixation for the treatment of radial head fracture with collapse of anterior articular surface.</p><p><b>METHODS</b>From March 2006 to January 2013,17 patients with radial head fractures with collapse of anterior articular surface were analysed. According to the Mason classification, there were 12 cases with Mason type II fractures and 5 cases with Mason type III fractures. All the patients were treated with open reduction through posterolateral entrance of elbow joint and Herbert or titanium cannulated screw internal fixation.</p><p><b>RESULTS</b>All the patients were followed up, and the duration ranged from 6 to 18 months, with a mean of 11.3 months. According to the Broberg and Morrey score system, 2 patients got an excellent result, 12 good and 3 fair. There were no complications such as infection of elbow joint, nerve injury, non-union, traumatic osteoarthritis, heterotopic ossification and elbow instability. However, the postoperative activity range of elbow in the injuried side was less than that in the normal side.</p><p><b>CONCLUSION</b>Radial head fracture with collapse of anterior articular surface is easily misdiagnosed, and it can be treated with open reduction and internal fixation through posterolateral entrance.</p>

Case-control study on percutaneous treatment of foot Jones fracture with cannulated screws / 中国骨伤

<p><b>OBJECTIVE</b>To compare clinical effects between plaster fixation and cannulated screw for the treatment of Jones fracture.</p><p><b>METHODS</b>From 2006 to 2010, 41 patients with Jones fractures were divided into 2 groups. In Group A, there were 14 males and 8 females, ranging in age from 21 to 62 years, with an average of (32.3 +/- 8.7) years; the course of disease ranged from 2 h to 3 d; the patients in Group A were treated with plaster fixation. In Group B, there were 9 males and 10 females, ranging in age from 24 to 59 years, with an average of (28.8 +/- 7.9) years; the course of disease ranged from 0.5 h to 2 d; the patients in Group B were treated with cannulated screw fixation. The patients in two groups were followed up from a long time and the long-term effects were studied.</p><p><b>RESULTS</b>All the 41 patients were followed up, from 3 months to 2.5 years, with a mean of 11.3 months. All the patients in both groups were healed. The patients in Group B got postoperative wound healing with A degree at the first stage without complications. In accordance with the Maryland Foot Score, the therapeutic effect in Group B was better than that of Group A. The healing time in Group B was shorter than that of Group A.</p><p><b>CONCLUSION</b>Percutaneous minimally invasive treatment with micro-cannulated screw is an ideal method for the treatment of the Jones fracture.</p>

Diagnosis and treatment of the coronal fracture of the femoral condyle / 中国骨伤

<p><b>OBJECTIVE</b>To investigate the diagnosis and treatment of the coronal fracture of the femoral condyle.</p><p><b>METHODS</b>Seven patients with Hoffa fracture treated in our hospital in recent 7 years were enrolled in this study. Six patients were treated with surgical treatment, while one non-displaced fracture received conservative treatment. Fractures were reduced under direct vision and fixed with hollow lag screws. The knees were immobilized in extension with cast after operation, and flexion exercise was commenced 3 weeks later.</p><p><b>RESULTS</b>All the patients were followed up. According to Kumar functional assessment system,5 patients got excellent results, 1 good, and 1 fair.</p><p><b>CONCLUSION</b>Rigid internal fixation with hollow lag screw and extension plaster fixation is the excellent way to treat the coronal fracture of the femoral condyle.</p>

Endothelium-independent vasorelaxant effect of puerarin on rat thoracic aorta / 中国中药杂志

<p><b>OBJECTIVE</b>To investigate the vasorelaxant effect of puerarin in rat aortic rings and the mechanism.</p><p><b>METHOD</b>The isolated thoracic aortic rings of male Sprague-Dawley rats were mounted on the organ bath and the contractile responses of the vessel were recorded.</p><p><b>RESULT</b>Puerarin completely relaxed the contractions induced by phenylephrine in a concentration-dependent manner in endothelium-intact and endothelium-denuded rat aorta, but it had no effect on those preconstricted by a high concentration of potassium chloride (KCl, 60 mmol x L(-1)). The relaxant effect of puerarin was significantly inhibited by pretreatment of endothelium-denuded aorta with potassium channel antagonists tetraethylammonium, 4-aminopyridine but not glibenclamide.</p><p><b>CONCLUSION</b>Puerarin induces an endothelium-independent relaxation in rat aortic rings. The mechanisms may involve the reduction in Ca2+ influx through the calcium channels operated by alpha-adrenergic receptor and the activation of the potassium channels (Kv and BKca, but not KATP).</p>