Objective To explore the biomechanical stabil ity of ideal compression screw (I.CO.S.) for treatment of femoral neck fracture and to provide theoretical basis for choosing I.CO.S. in cl inical appl ication. Methods Thirty cadaveric human femurs were selected and divided randomly into experimental group (n=15) and control group (n=15), 15 in each group were divided equally into three sub-groups (n=5) again. The model of subcapital femoral neck fracture was made, then given anatomical reduction and fixed with I.CO.S. (experimental group) and general cannulated compression screw (control group) separately with three different configurations: two horizontal (parallel screws in superior aspect of femoral neck), two vertical (parallel screws in sagittal plane of femoral neck) and reverse triangle. The different biomechanical performances were evaluated through experimental stress analysis. Results In biomechanical stabil ity aspect: groups A, B, C was better than groups D, E, F in respect of horizontal displacement and yield load (P lt; 0.05); groups A, D was better than groups B, E in respect of the straining, horizontal displacement and yield load (P lt; 0.05); and there were not significant differences in all biomechanical indicators between group C and group F, and between group A and group C(P gt; 0.05). Conclusion I.CO.S. has the good biomechanical stabil ity for treatment of femoral neck fracture, which mayprovide basis for appl ication.
Objective To evaluate the performance of emergency medical rescue (EMR) within 1 month after Lushan earthquake, and to prove and enrich the experience from Wenchuan earthquake, so as to provide useful references for global earthquake EMR with regard to decreasing death and disability rates. Methods All the following date published within 1 month after 4.20 Lushan earthquake were collected and analyzed, including official information, public documents, news release, relevant information from websites and victims’ medical records in the West China Hospital, then the relevant domestic and foreign literature about EMR (including EMR of Wenchuan earthquake). And then comparative analysis was conducted to evaluate the performance of EMR in Lushan earthquake. Results a) Being 87 km apart from each other, the main seismic zones of Lushan and Wenchuan located in the south west and middle north of Longmenshan fault zone, respectively. Although only 1 earthquake magnitude differed between them, the disaster area, and the number of affected population, deaths, disappearances, injured, severe injured and migration population in Wenchuan earthquake were 40, 23, 353, 853, 27, 14 and 51 times higher than those in Lushan earthquake, respectively. b) Learned from Wenchuan experience, the manpower scheduling in Lushan earthquake was quicker: the assembled medical personnel peak of Lushan vs. Wenchuan was 87.62% vs. 56.06 % in golden 72 hours post-quake. c) Supplies scheduling was more rational: the utilization rate was higher under the guidance of accurate information of demand. d) Medical treatment was more rational and efficient: the critical injured were treated following “Four concentration treatment principles”; saving life and restoring function at the same time; treatment and physical-mental rehabilitation at the same time; treatment and evidence production and implementation at the same time. e) Medical institutions and service returned to normal in time: 96.7% (440/455) of government owned township medical institutions in 21 affected towns returned to normal and provided medical services at their original sites. Conclusion By learning form Wenchuan experience, the following performance is implemented in Lushan earthquake: medical rescue guided by the accurate information; supplies scheduling guided by the accurate demand; both critical injured treatment,and physical-mental rehabilitation guided by the accurate assessment of injuries. So the medical rescue within 1 month after Lushan earthquake is quicker, more rational and efficient. After 20 days post quake zero death of critical injured was achieved. The early physical-mental rehabilitation fastens the functional reconstruction of the injured and helps them return to the society. So it suggests that the Lushan EMR enriches and develops the reference value of EMR experience of Wenchuan earthquake.
Objective To investigate the short-term effectiveness of Swanson artificial joint replacement in treating post-traumatic metacarpophalangeal joint stiffness. Methods Between August 2007 and May 2010, 11 cases (13 fingers) of metacarpophalangeal joint stiffness with soft tissue defects underwent Swanson artificial joint replacement. There were 7 males (9 fingers) and 4 females (4 fingers), aged 43 to 65 years with an average of 49 years. The involved fingers included 4 thumbs, 4 index fingers, 3 middle fingers, and 2 ring fingers. The types of injury included open and crush injury in 8 fingers, fracture of the metacarpophalangeal joint in 3 fingers, metacarpophalangeal joint severing in 2 fingers. The time from joint stiffness to hospitalization was 12 to 48 weeks (mean, 24 weeks). The joint activity was (136.82 ± 28.96)°. According to total active motion (TAM) assessment, included good in 1 finger, fair in 6 fingers, and poor in 6 fingers before operation. The activities of daily living were assessed by Sollerman score, which was 45.64 ± 11.04. The X-ray films and CT scan showed traumatic arthritis of the metacarpophalangeal joint. Results The incision healed by first intention. All patients were followed up 12 to 34 months (mean, 24.1 months). At last follow-up, the joint activity was (194.64 ± 28.86)°, showing significant difference when compared with preoperative value (t=25.214, P=0.000). According to TAM assessment, including excellent in 1 finger, good in 4 fingers, fair in 7 fingers, and poor in 1 finger. The Sollerman score was 67.45 ± 8.20 postoperatively, showing significant difference when compared with the preoperative score (t=10.470, P=0.000). X-ray examination showed no prosthesis fracture, periprosthetic fracture, or joint dislocation occurred at last follow-up. Conclusion Swanson artificial joint replacement can be appl ied to treat posttraumatic metacarpophalangeal joint stiffness, which can improve the joint activity and has satisfactory short-term effectiveness.
Objective We evaluated effectiveness and performance of medical rescue after Lushan earthquake during 2 weeks, and enriched Wenchuan lessons to provide useful references for emergency medical rescue (EMR) after similar earthquake worldwide. Methods We collected and analyzed official information, public documents, news release, and relevant information from websites, and then we systematically reviewed and descriptively analyzed all included literature of EMR after earthquake (domestic and foreign). Results Learned from Wenchuan earthquake, EMR for Lushan earthquake were characterized as: a) Assess the situations of quake damage and injuries were scientifically assessed; human resources, funds and materials were reasonably distributed; and the EMR relied mainly on regional rescue power of Sichuan province. b) Patients’ with critical injuries were treated using “Four concentration treatment principles”, which resulted in a new medical record of zero death, 14 days after the earthquake. c) The experience of EMR after Lushan earthquake verified, enriched and improved lessons from Wenchuan, Yushu and Yiliang earthquake, which provided first-hand references of evidence-based decision making for earthquake EMR worldwide.