Adolescent ; Adult ; Angiofibroma ; radiotherapy ; Humans ; Male ; Nasopharyngeal Neoplasms ; radiotherapy ; Neoplasm, Residual ; Postoperative Period ; Young Adult

A fast and sensitive liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for the determination of prodrug of paclitaxel (Pro-PTX) and paclitaxel (PTX) in rat plasma was developed. The plasma samples were subjected to protein precipitation with acetonitrile (0.1% formic acid), and then separated by LC with an Ultimate AQ-C18 column (50 mm × 3.0 mm, 3 μm) and acetonitrile-1 mmol·L^-1 ammonium formate (containing 0.1% formic acid) as the mobile phase. Multiple reaction monitoring (MRM) scanning mode was used to detect the ion responses m/z 983.4→415.2 (Pro-PTX), m/z 854.4→286.1 (PTX) and m/z 808.3→527.2 (Docetaxel, internal standard) by using a triple quadrupole tandem mass spectrometer with electrospray ionization source and positive ion mode. The method validation results show that the linear ranges of Pro-PTX and PTX in plasma were 2.00-500 ng·mL^-1 (r > 0.99) and 4.00-1 000 ng·mL^-1 (r > 0.99), the lower limit of quantification was 2.00 ng·mL^-1 and 4.00 ng·mL^-1, respectively; the quality control samples with low, medium and high concentrations of Pro-PTX and PTX were within the batch, the relative standard deviation (RSD) between batches were all less than 9%; the relative deviation (RE) was within the range of ± 9%; In the stability test, both Pro-PTX and PTX in plasma were stable under various storage conditions. The method was sensitive, specific, and reproducible, and was suitable for the pharmacokinetic study of Pro-PTX in rats. Animal experiments were approved by the Ethics Committee of Laboratory Animal Management and Animal Welfare, Institute of Materia Medica, Chinese Academy of Medical Sciences (No.: 00003552).

Although the surgical techniques has already improved in heart transplantation, heart preservation is still the biggest obstacle to the surgery.At present, heart preservation effective time is only 4-6 hour.How to extent the time of heart preservation is a major research direction.Comparison of available preservations for heart transplantation based on its mechanism and the prospect of its Clinical application.

Objective To compare the surgical outcome and long-term follow-up after mitral valve replacement through either minimally invasive(MI) or traditional median stemotomy(ST) surgery.Methods All 1 096 patients who received either MI or ST mitral valve replacement surgery,between January 1,2012 and July 30,2015 were analyzed for outcome differences due to surgical approach using propensity score matching(MI group n =405,ST group n =691).Find out the best matched with the 202 cases of the two groups.The clinical data of patients were collected including operativedata,postoperativecomplications,and follow-up.Results MI Group was longer in CPB time [(145.97 ±34.65)min vs.(92.24 ±25.58)min,(P ＜ 0.001)],aortic clamping time [(93.89 ± 25.25) min vs.(56.42 ± 18.09) min,(P ＜ 0.001)],and operating time[(237.49 ± 47.48) min vs.(217.31 ± 55.95) min,(P ＜ 0.001)].The MI group was associated with more less in transfusion(24.26％ vs 33.66％ P=0.037),mechanical ventilation[(15.29 ±11.45)h vs.(21.34 ±40.36)h,(P=0.041)],ICU stay[(44.12 ±39.51)h vs.(61.15 ± 106.01) h,(P =0.033)],volume of thoracic drainag[(404.11 ±485.84)ml vs.(674.82 ±585.37)ml,(P＜0.001)],postoperative drainage time[(2.59 ±1.75)d vs.(4.25 ±1.91)d,(P ＜0.001)],hospital stay [(5.64 ± 3.07) d vs.(1 1.44 ± 6.71) d,(P ＜ 0.001)].There were no significant difference in the complications of follow-up(P ＞ 0.05).SF-36 score had no significant difference either(P ＞ 0.05).Conclusion The minimally invasive thoracoseopic has longer in CBP time and cross-clamp time,;but it didnot increase the risk of mortality and complications.What's more,havingless trauma,fewer transfusions,lcss wound infection,faster rccovcry,and high satisfaction with the incision in long-term follow up and other advantages.Minimally invasive thoracoscopic cardiac surgery is safe,effective and feasible.

OBJECTIVETo summarize the clinical characteristics, surgical management and postoperative complications in patients with congenital bicuspid aortic valve (CBAV) over 50 years of age.

METHODSFrom January 2009 to September 2011, 73 CBAV patients aged 51-76 years (mean 61.8∓0.73 years) were treated in our center. Except for 1 patient who underwent Bentall surgery and another having Wheat surgery, all the patients received aortic valve replacement (AVR), including 7 with double (mitral and aortic) valve replacement (DVR), 6 with mitral valvular plasty, 11 with tricuspid valvular plasty, 8 with coronary artery bypass graft implantation, 1 with aortic-left ventricular tunnel repair, 1 with atrial maze ablation, and 1 with left atrial thrombosis removal.

RESULTSTwo patients died after the surgery, with a perioperative mortality rate of 2.7%. The cardiopulmonary bypass time was 78-217 min (mean 131.9 ∓6.0 min) with an aortic blocking time of 56-158 min (mean 88.2 ∓4.8 min) and total postoperative ICU time of 23.0-647.4 h (mean 97.9∓10.5 h). The postoperative complications included low heart output syndrome in 5 cases, bleeding in 4 cases, wound debridement in 4 cases, and hemodialysis due to acute renal failure in 1 case. The left ventricular end diastolic diameter reduced significantly after the surgery (52.6∓1.7 vs 43.2∓1.0, P=0.001). No significant changes were detected in the left ventricular ejection fraction (62.3∓2.5 vs 65.5∓1.3, P=0.257).

CONCLUSIONThorough preoperative examination, preoperative risk factor assessment, timely perioperative interventions, careful evaluation of patients' tolerance of surgery, and prevention of surgical complications are essential to decrease the perioperative mortality in elderly patients with CBAV.

Aged ; Aortic Valve ; abnormalities ; surgery ; Coronary Artery Bypass ; Female ; Heart Valve Diseases ; mortality ; surgery ; Heart Valve Prosthesis Implantation ; methods ; Humans ; Male ; Middle Aged ; Mitral Valve ; surgery ; Postoperative Complications ; prevention & control ; Retrospective Studies

OBJECTIVETo investigate clinical efficacy and feasibility of double-plating fixation via anteriormiddle approach in treating type C3 distal femoral fractures.

METHODSFrom August 2008 to August 2011, 12 cases with type C3 distal femoral fractures were treated, including 5 open fractures and 7 closed fractures. Among them, there were 8 males, 4 females with an average of 40 years (ranged, 25 to 55 years). There were 7 in left side, 5 in right side. Nine cases were caused by car accident, 3 cases by falling down. The duration from injury to hospital was form 20 minutes to 5 days (mean 135 min). After tibia bone traction for 5 to 8 days, the operation were performed by double-plating fixation via anteriormiddle approach, and autograft of iliac bone or allograft bone grafting were given to bone defect. Knee joint function was evaluated according to Merchanetal criteria.

RESULTSThe operation time was from 110 to 160 min, with an average of 135 min, the blood loss was from 300 ml to 500 ml,with an average of 400 ml. Post-operative wound were stage I healing. All patients were followed up from 16 to 36 months (mean 24 months). No infection, reduction loss, nonunion, deep vein thrombosis occurred. Bone healing time was for 18 to 24 weeks with an average of 21 weeks. According to the Merchanetal criteria, 4 cases got excellent results, 6 good, 1 fair and 1 poor.

CONCLUSIONDouble-plating fixation via anteriormiddle approach for type C3 distal femoral fractures is an effective way, which has advantages of obvious exposure, simple manipulation, anatomical reduction, stable fixation. However,operation indications and operating instructions should be strictly followed.

Adult ; Bone Plates ; Female ; Femoral Fractures ; diagnostic imaging ; surgery ; Fracture Fixation, Internal ; instrumentation ; Humans ; Male ; Middle Aged ; Tomography, X-Ray Computed ; Treatment Outcome

Objective To investigate the surgical technique and outcomes of replacement of chordae tendineae in mitral valve repair, and evaluate the value of real-time three-dimensional transesophageal echocardiography in the perioperative period. Methods Thirty-one patients with mitral valve prolapse underwent mitral valve repair using chordae tendineae replacement concomitant with implantation of valveplasty ring. A 4-0 Goretex sutures was used for reconstruction of artificial chordae. Realtime three-dimensional transesophageal echocardiography was performed in all the patients during the preoperative, intraoperatire, and postoperative periods. The length of the chordae tendineae under the A1 section of the anterior leaflet and the P1 section of the posterior leaflet were measured and considered the normal length of chordae tendineae by real-time three-dimensional transesophageal echocardiography preoperatively. These pre-determined normal chordal lengths helped intraoperatively to approximate the length of the artificial chordae used and postoperatively to gauge the success of the procedures. The same values were used again postoperatively to gauge the success of intervention. Full flexible valveplasty rings were used in all the patients.Results There was no operative death. The mean cardiopulmonary bypass (CPB) and aortic cross clamp time were ( 142. 0 ±31.2 ) min and (98.0 ± 22.5 ) min, respectively. One patient' s intraoperative echocardiography upon termination of CPB showed persistent severe mitral regurgitation and was converted to mitral valve replacement. This patient was not included in the study group. The mean number of artificial chordae per patient was (2.0 ± 1.5 ) , range from 1 to 3. The mean preoperatively measured normal chordal length was ( 21.0 ± 2.5 ) mm, and the mean postoperative artificial chordal length was ( 20.0 ± 2.2 )mm. The difference was not significant. The follow-up interval was from 3 to 30 months and the follow-up rate was 98%. During the follow-up period, there was no late death. Trace mitral regurgitation (MR) was detected in 15 patients, mild and moderate MR were detected in 1 for each. No severe MR was detected. The freedom from reoperation was 100% during follow-up.There were no documented artificial chordae ruptures. Conclusion Conclusion Artificial chordal replacement with Gore-tex suture in mitral valve repair in this group of patients with mitral valve prolapse appears to have satisfactory early and mid-term results. Real-time three-dimensional transesophageal echocardiography plays a critical role in this technique. Real-time threedimensional transesophageal echocardiography can exactly predict the length of artificial chordae, which is helpful to improve the outcomes of mitral valve repair. However, longer term follow-up and larger series are required to validate our findings.

In recent years,medical disputes occur quite frequently and doctor-patient relationship becomes more and more tensional.There exists an important factor of doctors' opportunistic behavior besides patients' misunderstanding caused by disease suffering,governments' under-investment in medical market,and imperfect supervise of the relevant departments.This paper analyzed the reasons and main forms of doctors' opportunistic behavior and how to solve it,and thus to improve the tense doctor-patient relationship and medical environment.

Objective To assess the inlfuence of depth on liver stiffness measurement with real-time shear wave elastography (SWE) and determine the optimal depth for SWE in liver. Methods SWE of liver was performed on 89 healthy volunteers between May 2012 and November 2012. The depths of each liver were varied from 0 cm to 7 cm (from the liver capsule) in 1 cm increment and there were 8 depth groups in total. Then the elastic modulus of liver in each depth group were measured three times by SWE. The body mass index (BMI) and the distance from body surface to liver capsule were documented. The success rates and the mean elastic modulus of each group were calculated. Results The success rates of 0-7 cm were 0, 98.9%(88/89), 98.9%(88/89), 98.9%(88/89), 71.9%(64/89), 24.7%(22/89), 3.4%(3/89) and 0, respectively. The success rates were highest in 1 cm, 2 cm and 3 cm groups but signiifcant decreased with the increasement of depths in 4 cm, 5 cm and 6 cm groups ( 3 cm vs 4 cm, χ2=25.94, P<0.001; 4 cm vs 5 cm, χ2=39.68, P<0.001;5 cm vs 6 cm,χ2=16.79, P<0.001). The mean elastic modulus of 1 cm, 2 cm, 3 cm, 4 cm and 5 cm groups were (4.77±0.99), (4.68±0.99), (4.76±0.95), (5.19±1.10) and (5.41±0.95) kPa, respectively. The mean elastic modulus of 4 cm and 5 cm groups were signiifcant higher than those of 1 cm, 2 cm, 3 cm groups (4 cm vs 1 cm, t=-2.85, P=0.005;4 cm vs 2 cm, t=-3.49, P=0.001;4 cm vs 3 cm, t=-2.76, P=0.006;5 cm vs 1 cm, t=-3.13, P=0.002;5 cm vs 2 cm, t=-3.66, P=0.000;5 cm vs 3 cm, t=-3.05, P=0.003). In the group of 4 cm, the BMI and the distance from body surface to liver capsule of the volunteers performed successfully and unsuccessfully were (20.70±2.87), (22.07±2.42) kg/m2 and (1.45±0.25 ), (1.60±0.29) cm, respectively. In the group of 5 cm, the BMI and the distance from body surface to liver capsule of the volunteers performed successfully and unsuccessfully were (19.82±2.76), (21.49±2.72) kg/m2 and (1.35±0.21), (1.54±0.26) cm respectively. The BMI had no signiifcant difference between the successful and unsuccessful groups (t=-2.83, P=0.108 for 4 cm;t=0.77, P=0.709 for 5 cm), but the distance from body surface to liver capsule was signiifcantly different (t=26.51, P=0.012 for 4 cm;t=79.57, P=0.004 for 5 cm). Conclusions The success rates and elastic modulus were different at different depths. SWE should be performed at the depths of 1-3 cm from the liver capsule.