Objective To examine the association of characteristics of patients visiting fever clinic with different air quality index in Beijing.Methods Six days with highest ambient air quality index (AQI) (polluted weather group) and 6 days with lowest AQI (clear weather group) during February 1 st to March 31th 2014 were selected as study period.The clinical data of patients,who visited in fever clinic of Peking University Third Hospital during the selected 12 days,were retrospectively analyzed.Results There were 417 patients in clean weather group and 481 in polluted weather group.There were no significant differences in duration of fever [(2.30 ± 2.51) d vs.(2.18 ± 2.58) d,x2 =0.701,P =0.484] and highest body temperature [(38.60 ± 0.65) ℃ vs.(38.57 ± 0.66) ℃,x2 =0.545,P =0.586] between two groups.The symptoms of cough,sore throat in pollution group were higher than those in clear group (52.39％ vs.45.56％,x2 =4.166,P =0.041;50.52％ vs.42.21％,x2 =6.203,P =0.013,respectively).The proportion of cases diagnosed as influenza-like illness in polluted weather was higher than that in clear weather group (53.85％ vs.46.76％,x2 =4.484,P =0.034).Conclusion The results indicate that the symptoms cough and sore throat and influenza-like illness are increased in polluted weather in Beiiing.

Objective To explore the clinical results of metacarpophalangeal(MP) intra-articular fractures treatment assisted with MP arthroscopy. Methods Five patients suffered from MP joint fractures were treated with closed reduction and K-wire fixation under the MP arthroscopy. The age of the patients was from 17 to 53 years with an average of 23.5 years. There were four males and one female. All the fractures were caused by direct trauma. The head of metacarpal bone was injured in one case while the bases of proximal phalange were involved in four cases. 2 were of simple fractures and 3 of comminuted fractures. No joint surface defects were found preoperatively. The duration from injury to surgery was from 5 days to 3 weeks. The treatment results were evaluated with respect to MP arthroscopical findings, the fracture union and the postoperative function. Results The fracture lines could be seen in 4 cases under arthroscopy except one located at the palmar aspect of metacarpal head, which was then treated with open reduction and internal fixation. During the examination with MP arthroscopy, one case each of volar plate injury and collateral ligament injury was found. The patients were followed up 3-6 months with an average of 4.8 months postoperatively. All the patients obtained fracture union with a smooth joint surface. The motion of involved MP joints achieved nearly to their normal active range in 3 cases. No pain or snapping was found during the movement of MP joints. There was also no lateral instability. Only in one case, because of the massive and comminuted fracture, the involved finger was immobilized with plaster for five weeks, the ROM of MP joint became 90? for flexion and -56? for extension at 5 months postoperatively. Conclusion It is a less invasive procedure with good results to treat MP joint fractures assisted with MP arthroscopy. It is suitable for some acute MP intra-articular fractures.

Objective To observe effect of phrenic nerve transter to the posterior division ot lower trunk (PDLT) for recovering elbow and finger extension in patients with brachial plexus root avulsion.Methods From June 2005 to December 2008,43 patients with brachial plexus root avulsion were treated with phrenic nerve transfer to PDLT to recover elbow and finger extension.There were 36 males and 7 females,aged from 4 to 44 years (average,23.5±9.9 years).The interval from injury to operation ranged from 1 to 12months (average,3.7±1.9 months).There were 32 cases of total nerve roots avulsion,5 cases of middle and lower trunk avulsion accompanied with upper trunk normal or partial injury,and 6 cases of C6 to T1 nerve root avulsion accompanied with C5 nerve root rupture or partial injury.The normal function of the phrenic nerve in the injured side should be proved preoperatively by radiographic and electromyographic examination.The entire brachial plexus in injured side was exposed through the combined incision.The posterior division of lower trunk was identified and severed as proximal as possible,and the posterior cord and radial nerve were dissociated distally until to the level of midpoint of humerus.Then the branches of the posterior cord except the radial nerve were sectioned.Direct anastomosis of the phrenic nerve and PDLT was performed in 33 patients,and indirect anastomosis through bridge grafting using sural nerve was performed in remaining 10 cases.Results All patients were followed up for 36 to 73 months (average,39.7±7.l months).The percentage of muscle strength ≥grade 3 in elbow,finger and thumb extension was 81.6％,41.9％ and 39.5％,respectively.Conclusion Satisfactory functional recovery of elbow extension had been achieved after the phrenic nerve transfer to the PDLT in patients with brachial nerve root avulsion injury,however,the functional recovery of finger and thumb extension was not as satisfactory as anticipated.

Objective To expore the effect of nerve repair for patients with traumatic suprascapular nerve combined with axillary nerve injuries.Methods Data of 13 cases with traumatic suprascapular nerve combined axillary nerve injuries treated by surgery from June 2003 to September 2011 were retrospectively analyzed.All the cases were males,and the average age was 28 years old.There were 2 cases of neck of scapula fracture combined with clavicle fracture,3 of floating shoulder injury,1 of humerus neck fracture combined with glenoid cavity fracture,3 of clavicle fracture,1 of acromion fracture,2 of shoulder blade fracture and 1 of atlanto-axial vertebral fractures.All the 13 cases performed isolated lost of the function of shoulder abduction and external rotation completely,and the muscle strength of deltoid,the supraspinatus and infraspinatus was M0.The electrophysiological examination showed complete denervation of axillary nerve and suprascapular nerve.The suprascapular nerve was broken in 10 cases in which 6 cases were repaired by 1 band sural nerve graft and 1 case was repaired by 1 band superficial cervical plexus,and 3 cases were irreparable because of the distal avulsion injury from the target muscle,and 3 cases were performed with neurolysis.The axillary nerve ruptured in 12 cases,in which 10 cases was repaired by 2-3 bands sural nerve graft,and fascicles selected from the median nerve were used to neurotize axillary nerve in 2 cases.The neurolysis of axillary nerve was performed at the quadrilateral space in 1 case.10 of the 13 cases had both the suprascapular nerve and axillary nerve ruptured.Results 13 cases were followed up,the follow up period was 36 to 134 months.In 7 cases,the functional recovery of shoulder abduction were 180° and the average external rotation was 56° and the muscle strength of deltoid attained M4.In 5 cases,the average shoulder abduction was 38°;the range of external rotation was-40°-30°,and the muscle strength of deltoid achieved M4 in 1 case,M3 in 2,M2 in 2.There was no improvement in 1 case.Conclusion The suprascapular nerve associated axillary nerve injury should be suspected in the patients with isolated lost the function of shoulder abduction and extemal rotation completely.Repair of axillary nerve and suprascapular nerve by nerve graft simultaneously could achieve good outcome,and early surgery should be conducted.

ObjectiveTo observe the functional recovery of shoulder joint and the reduction of posterior dislocated humeral head in children with shoulder joint internal rotation contracture and humeral head posterior dislocation secondary to brachial plexus birth palsy treated by a modified surgical procedure through the anterior combined posterior approach of the shoulder. MethodsNinteen patients,ranging in age from 2.5 to 8.5 years (average 5 years),suffered posterior dislocation of the shoulder joint secondary to internal rotation contracture in brachial plexus birth palsy. The gleno-humeral joint deformity was confirmed by X-ray and CT examination and classified as type Ⅳ in 15 eases and typeⅤin 4 cases according to the modified water's criteria.The surgical procedure was as follows:the contracture soft tissue around the anterior of shoulder joint was released firstly through the anterior approach, and the posterior-inferior capsule of the shoulder was exposed and separated with the pseudoglenoid through the posterior approach,the humeral head was reduced by external rotation the arm,then the posterior-inferior capsule was retighten.A plaster cast was used to fix the shoulder at the neutral position of 0° for 4 weeks. ResultsAfter 12 to 36 months follow up(average of 20 months), the Mallet score of the shoulder was from 11.4 ± 1.7 (range 7-16)preoperative to 15.5 ± 1.8(range 13-19) postoperative,the difference was significantly (P ＜ 0.05).The central relocation of humeral head was achieved in 16 patients, but the humeral head was still dislocated to posterior in 3 cases.ConclusionsThe posterior-inferior capsule was separated with the pseudo-glenoid and retighten through the posterior approach,and reduction of the humeral head by soft tissue releaseing through the anterior approach can recover the concentric relationship of gleno-humeral joint and improve the function of shoulder joint with posterior dislocation secondary to internal rotated contracture deformity in brachial plexus birth palsy.

It is difficult to measure the circular arc radius for central angle less than 30 degrees. The existing measuring methods are of low efficiency and big error. Through designing the machine vision system and studying the image detecting method for measurement, It is obtained good results by using the new measurement for tracheal intubation's circular arc radius, Realized a rapid and accurate measurement of the circular arc radius, and expanded the application in the field of machine vision.
Humans ; Imaging, Three-Dimensional ; instrumentation ; Intubation ; Trachea

Objective To observe the outcomes of the modified multiple nerve transfer s combined with the late hand function reconstruction to restore the active pick-up function of the paralyzed upper extremity in patients with total brachial plexus avulsion injuries (TBPAI).Methods 33 patients suffered with TBPAI firstly underwent multiple nerve transfers,which including accessory nerve transfers to neurotize the suprascapular nerve to recover the shoulder abduction,contralateral C7 (CC7) nerve transfers via the modified pre-spinal route with direct coaptation to restore lower trunk function and the musculocutaneous nerve was also neurotized by the transferred CC7 nerve via a cutaneous nerve graft to restore the function of elbow flexion,as well as the phrenic nerve transfers to neurotize the posterior division of lower trunk to restore the function of elbow and finger extension.The patients with muscle recovery were selected to perform the hand function reconstruction at the second stage for restoring the active pick-up function.The patients were chosen as followcriterias:the degree of shoulder abduction attained 30°or more,the motor power of elbow,wrist,and finger flexion attained grade M4 or more,elbow and finger extension attained M3 or more.The methods of hand function reconstruction included wrist fusion and flexor carpal ulnaris opponensplasty,in addition to palmar capsulodesis of the metacarpophalangeal joint.Results The mean follow up was 41±7.7 (range,36-73 months) after the first procedure of multiple nerve transfers,the muscle strength of elbow and finger and wrist flexion attained M 4 as well as the elbow and finger extension achieved M3 or more in 10 patients,all of 10 patients achieved 40°-80°shoulder abduction.8 out of 10 patients had performed the second surgical procedure for hand functional reconstruction.6 of them had successfully recovered the active pick-up function.Conclusions The newly designed procedure of multiple nerve transfers could effectively restore the function of shoulder abduction,elbow,wrist,and finger flexion,as well as elbows and finger extension in patients with TBPAI,combined with the hand functional reconstruction,active pick-up function could be successfully reconstructed.

Objective To investigate the occurrence, prevention and management of surgical complication of contralateral C7 nerve root transfer through the prespinal route to repair the brachial plexus nerve root avulsion injury. Methods From Feb. 2002 to Aug. 2009, 425 patients were performed the contralateral C7 nerve root transfer through the prespinal route with this procedure. There were 379 males and 46 females,with the average age of 21 years (range, 3 months to 56 years). The contralateral C7 nerve root was sectioned at the distal of the middle trunk in 15 cases, at the distal of the anterior and posterior division in 410 patients. The surgical complications related to the health C7 nerve root section and the make of tunnel through the prespinal route and others were analyzed retrospectively. Results The incidence rate of complication was 5.2%(22/425). The surgical complications related to the make of prespinal route including 2 cases had the severe bleeding during the operation because of vertebral artery injury; transitory laryrecurrent nerve palsy occurred in 5 cases, the pain and numbness occurred on the donor upper limber in 4 cases when the patients swallowed. The complications related to the section of contralateral C7 nerve root including the extension of finger and thumb was dysfunction in 5 patients after the operation, 3 cases had the severely pain on the health upper limber, Horner's sign occurred on donor side in 2 children suffered birth palsy, and C6 nerve root was mistaken sectioned as C7 in 1 case. Other serious perioperative complication including the thromboses of the cerebral trunk occurred in 1 case 42 hours postoperative and died in hospital 38 days after the operation. Conclusion The procedure of contralateral C7 nerve root transfer through the prespinal route is safe. The effective method to prevent this complication occurrence is to expose the origin segment of vertebral artery when making prespinal route.

Objective To evaluate the prevalence of hepatic steatosis in patients with chronic hepatitis B (CHB) and the impact of hepatic steatosis on the progress of fibrosis. Methods Five hundred and sixty two untreated CHB patients (405 males and 157 females) with an average age of 31.3 underwent liver biopsy from January to August 2007. On the day of liver biopsy, a questionnaire was completed and a blood sample was obtained for laboratory analysis. The degree of liver steatosis, necroinflammation and fibrosis was assessed; demographic information and clinical data including age, gender, body mass index (BMI), history of diabetes mellitus, hypertension, dyslipidemia, and HBeAg status, HBV DNA viral load were documented. Results In 562 patients, 102 (18. 2% ) had steatosis. Multivariate analysis demonstrated that liver steatosis was associated with the levels of TG, APO-B, UA, FSG, and higher BMI; and the progress of fibrosis was associated with high degree of hepatic steatosis and necroinflammation, age over 35 years, HBV DNA > 103 copies/L, high BMI and GGT. Conclusions The results show that obesity and dyslipidemia in CHB patients are associated with the hepatic steatosis, and the latter seems to be an important determinant for fibrosis.