Objective To evaluate left liver anatomical resection via left vertical groove by laparoscope.Method Among 103 patients with left intrahepatic biliary calculi,39 cases underwent left lateral hepatectomy,20 cases did left liver anatomical resection via left vertical groove by laparoscope,29 cases underwent left lateral hepatectomy via left liver diaphragmatic surface,15 cases did left liver anatomical resection via the first porta.Result In the 103 cases of laparoscopic left liver anatomical resection,101 cases were successful and two cases were conversed to open surgery.In the success group,total laparoscopic anatomical left lateral lobectomy was performed (Ⅱ,Ⅲ section) in 68 cases.Compared with the approach via left liver falciform ligament diaphragmatic surface,the operatve time via left vertical groove was significantly shorter(t =-2.723,P =0.008,intraoperative blood loss was significantly smaller (t =-5.399,P =0.000),while the differences in postoperative hospital stay (t =-0.168,P =0.867) and postoperative complications (x2 =0.664,P =0.415) were of no statistical significance between the 2 groups.In the 33 cases of left hemihepatectomy (Ⅱ,Ⅲ,Ⅳ section),those performed via left vertical groove compared with through the first porta hepatic,used shorter operation time(t =-3.144,P =0.004),while blood loss was similar(t =-1.049,P =0.302),as well as the length of hospital stay(t =0.784,P =0.439).There was no postoperative bleeding and intractable bile leakage,nor postoperative air embolism.Flatus on an average of (2.5 ± 1.2) days.Patients were discharged from hospital 5-17 (9.98 ±2.98) days post-op.96 cases were followed up in the 101 cases undergoing successful total laparoscopic left hemihepatectomy.The followed-up time were 3-52 (32.6 ± 5.7) months.Postoperative review found no residue stone.One case in first porta hepatis group,caudate lobe atrophy was found by postoperative CT.Conclusions Left liver anatomical resection via left vertical groove by laparoscope is less traumatic,quick recovery with satisfactory clinical curative effect for the treatment of left hepatolithiasis.

Objective To study the changes of acetyl-histone H2B in the cochlear hair cells of the guinea pig model of noise-induced hearing loss (NIHL).Methods Sixty guinea pigs were randomly divided into control and noise-exposure group.Thirty guinea pigs in the noise-exposure group were exposed to narrowband noise at 122 dB SPL for 3 hours , while thirty guinea pigs in the control group were not exposed to noise.Auditory thresholds were assessed by auditory brainstem response (ABR), prior to noise in two groups and 3, 7,14 and 21 days after noise exposure in the noise group.Then we investigated the expression of acetyl-histone H2B levels in the sensory cells of basilar membrane after noise expose by immunofluorescence staining and western blot.Results Compared with pre-exposure hearing, ABR thresholds were increased at 1h, 3, 7, 14 and 21 days after noise exposure, and recovered gradually with time and reached a permanent threshold shift at 14 days.The expression of acetyl-histone H2B was down-regulated in the hair cells and Hensen''s cells of the guinea pig cochlea after the noise expose , The ratio of H2B-AcK5 / β-actin was 0.6179±0.1260 in the control group and 0.3102±0.0839 in the noise group, and the difference was statistically significant (P<0.01).Conclusion Noise decreased the inner ear sensory cells histone acetylation level and histone acetylation imbalance may be involved in the occurrence of NIHL.

OBJECTIVE To investigate the features of somatic mutations of the hypervariable region (HV) of mitochondrial DNA (mtDNA) D-loop in laryngeal squamous cell carcinoma (LSCC) and the relationship with clinicopathological characteristics. METHODS Microdissected cancerous tissues, paracancerous tissues and peripheral vein blood were obtained from 40 patients with LSCC and total DNA was extracted. HVⅠ and HVⅡ fragments were amplified by PCR and purified. Mutations were determined by DNA sequencing. The mutations of HVⅠand HVⅡ and their relationship with clinicopathological characteristics were analyzed. RESULTS ①In 40 LSCC samples, 86 polymorphisms were found, 21 (52.5 %) tumors presented somatic mtDNA mutations with a total of 34 mutations. Among them, 28 (82.4 %) and 6 (17.6 %) were located in HVⅠ and HVⅡ respectively. ②Tumor D-loop mutation showed significant correlation with tumor differentiation(P=0.028) and p53 mutation (P=0.041), respectively. CONCLUSION Mitochondrial DNA D-loop in LSCC is an unstable region with high frequency of somatic mutation and high polymorphism and might play a potential role in the carcinogenesis of the larynx.

Objective To study the feasibility and efficacy of intraoperative choledoscopy combined with laparoscopic left liver resection to treat intrahepatic lithiasis.Method In 49 patients with biliary stone,laparoscopic left lateral sectionectomy/left medial sectionectomy/left hepatectomy combined with intraoperative choledochoscopy and stone retrieval were carried out.Results Laparoscopic left lateral sectionectomy was carried out in 29 patients,left medial sectionectomy in 2 patients and left hepatectomy in 18 patients.In all the patients,combined choledoscopy and stone retrieval were carried out.A concomitant laparoscopic cholecystectomy (LC) was carried out in 11 patients.The average operative time was 226 min.When LC was carried out,the mean operative time was 243 min.The mean intraoperative blood loss was 378 ml.There was no bile leak or postoperative bleeding.Flatus was passed 1-3 days after surgery.The patients were discharged home 7-10 days after surgery.Postoperative MRI/MRCP did not reveal any residual stone.On a mean follow up of 16 months for 47 patients,the patients did well and there was no recurrent stone.Conclusion Choledochoscopy combined with laparoscopic left liver resection for bile duct stone resulted in minimal trauma to the patient.The recovery was quick and there was a high stone clearance rate.The treatment was safe,efficacious,and it is a viable minimally invasive treatment option.

Objective To evaluate the therapeutic effect of combination of sandostatin and growth hormone (GH) in the treatment of severe acute pancreatitis (SAP ). Methods Sixty patients with SAP were divided randomly into 3 groups:(1)Sandostatin treatment(ST) group (n=15);(2)combination of sandostatin with GH treatment(CT) group (n=30) ;(3)control group (n=15). The changes in serum IL-1, IL-6,TNF-? and albumin levels after treatment, and the incidence of complications, the duration of hospital stay and cost were compared among the 3 groups. Results The complications, mortality, duration of hospital stay in the CT group were significantly shorter than those in ST group and control group (all P

Objective To investigate the risk factors leading to complications in patients undergoing laparoscopic cholecystectomy (LC). Methods Clinical data of 11?974 patients undergoing LC from Mar. 1991 to June 2003 were collected and analyzed retrospectively. Fifteen clinical factors were recruited for the study in relation to surgical complications. Data were analyzed by ?2 test and Logistic regression. Results The overall operative complication rate was 1.896%. The procedure was shifted to open surgery in 2.389% of all cases, Logistic regression analysis revealed that Calot triangle adhesion, stage, expertise of the team, gallbladder wall thickness, gallbladder and vicinity adhesion were important risk factors for complications. Conclusion LC complications can be prevented by good training, strictly following protocol, and timely shifting to open surgery.

Objective To discuss the clinical value of combined antegrade and retrograde technique of laparoscopic cholecystectomy in prevention of bile duct injury.Methods Clinical data of 613 patients who underwent laparoscopic cholecystectomy with combined antegrade and retrograde technique from March 1991 to June 2006 were analyzed retrospectively.Results Cholecystolithiasis with atrophy of gallbladder was found in 121 cases,acute and subacute cholecystitis in 432 cases,cholecystolithiasis with chronic cholecystitis in 42 cases and polyps of cholecyst in 18 cases.Nine cases were converted to laparotomy(5 cases of cholecystolithiasis with atrophy of gallbladder and 4 cases of subacute cholecystitis).The average operation time was 43.5 minutes.Bile leakage occured in only 1 case after operation and fully recovered after 3 days of drainage,and all the other cases had smooth recovery with no bile duct injuries or serious complications such as haemorrhage,infection or death.The mean hospitalization time after operation was 5.5 days.Conclusions The application of combined antegrade and retrograde technique can increase the success rate of laparoscopic cholecystectomy,and reduce the incidence of injuries of bile duct,especially in those patients with inadequate exposure or anatomical variation of Calot′s triangle.

Objective To explore the application of diffusion-weighted imaging (DWI) and apparent diffusion coefficient (ADC) value in the diagnosis and differential diagnosis of prostatic cancer. Methods Diffusion-weighted echo-planar imaging (EPI) sequences were performed in 46 patients, including 21 cases of benign prostatic hyperplasia (BPH), 9 cases of chronic prostatitis and 16 cases of prostate cancer. DWI were obtained with a b-factor of 800 s/mm2. According to the pathological results obtained by ultrasound guided biopsy, the peripheral zone of prostate was divided into six parts by orientations and they were divided into noncancerous, hyperplasia, prostatitis and cancerous groups. The ADC value of each region was measured and analyzed with one-way ANOVA and ROC analysis. Results Acceptable images for ADC measurement were obtained in all cases.The mean ADC values of prostatic peripheral zone, prostatic central gland, inflammatory area and cancerous area were (2.20±0. 29)×10-3 mm2/s, (1.66±0.14)×10-3 mm2/s, (1.95±0.34)×10-3 mm2/s and ( 1.24 ± 0.32) × 10-3 mm2/s, respectively. There were statistically significant differences in ADC values between the inter-groups (P＜0. 01 ). With ROC cut point setting to 1.49 ×10-3 mm2/s, the diagnostic sensitivity and specificity for prostate cancer were 86. 8% and 94. 0%, the area under the ROC curve (AUC) was 0. 945±0. 010. Conclusions ADC value might be useful to evaluate prostate cancer. DWI has an important clinical application value in the diagnosis and differentiation of prostate cancer.

ObjectiveTo investigate the central nervous system mechanisms of active of movement switch in the patients with Tourette' s syndrome( TS),and to explore the possible underlying distinct neural networks for tic trigger and generation. Methods Participants were 14 patients with TS and 14 age- and gender-matched healthy volunteers with no history of physical,psychiatric or neurological disease: All patients were assessed with functional magnetic resonances imaging (fMRI)of the brain during the intermittent performance of finger-tapping switch tasks,Blood-oxygen-level dependent-fMRI was performed using a 3.0 Tesla MR.The area over which the activation was distributed was calculated,and the activation volumes were also compared between the patients with TS and the control subjects.ResultsThe regions activated in the patients with TS and in the volunteers were similar in several brain regions,including contralateral precentral and postcentral gyrus,contralateral mesia pre-front gyrus,contralateral cingulate gyrus,contralateral insula and ipsilataral cerebellum. There were also many different activation areas between the patients and the control subjects. The patients with TS demonstrated more significant and extended activation in the contralateral pre- and postcentral gyrus than the healthy volunteers.The volume of the left pre- and postcentral gyrus of the TS patients was (8.024 ±0.071 ) cm3,while the volume of the left pre-and postcentral gyrus of the control subjects was ( 6.480 ± 0.026) cm3 ( t =3.026,P ＜ 0.01 ) ; The volume of the right pre- and postcentral gyrus was (6.192 ± 0.019) cm3 in the TS cases,while there was (5.608 ±0.037) cm3 in the control subjects (t =2.752,P ＜0.05).There were significant differences in the volumes of bilateral pre- and postcetral gyrus between the TS and control subjects. The activations of conralateral thalamus without contralateral insula were found in the patients with TS. Conversely, the contralateral insula activation without thalamus activation could be found in the healthy volunteers.ConclusionThe thalamus might play an important role in the aetiological and physiopathologic mechanisms of the TS. The thalamus along with the parietal cortex,cingulate cortex and insular cortex appear to constitute a distinct neural network for tic trigger and generation.

OBJECTIVE Aimed to observe the changes of acetylated histone H2B in the marginal cells of stria vascularis and spiral ganglion cells from the noise-induced hearing loss model (NIHL). METHODS Fifty guinea pigs were randomly divided into control and noise-exposure group. Auditory brainstem response threshold shift was examined before noise exposure and at 1h after noise exposure (122 dB SPL, 3 h). Immunofluorescence staining and western blot were used to observe the expression of acetyl-histone H2B both in the marginal cells of stria vascularis and spiral ganglion cells of modiolus 2 h after noise expose in two groups. RESULTS There was no significant difference in hearing threshold of 4, 8, 16, 32 kHz for the two groups before noise exposure. The hearing threshold was beyond 90dB (the maximum output) at 4,8,16 and 32 kHz 1h after noise exposure. The expression of acetylated histone H2B significantly decreased with immunofluorescence staining in the marginal cells after noise stimulation. Accordingly, the protein level of acetylated histone H2B in the lateral wall of cochlear decreased obviously in the noise group compared to the control, the ratios of H2B-AcK5/p-actin were 0. 3471 ±0. 0843 and 0. 6114 ±0. 0207 respectively(t=5. 268,P＜0. 01). There was no obvious difference for the expression of acetylated histone H2B in the modiolar tissue between two groups, the ratio of H2B-AcK5/p-actin was 0. 4993 ± 0. 0994 for the noise group and 0. 5139±0. 0132 for the controI (P＞0. 05). CONCLUSION Noise exposure significantly decreased histone acetylation expression in the nuclei of strial marginal cells, whereas the level in the spiral ganglion cells remained stable. Histone acetylation imbalance in the marginal cells of stria vascularis may contributed to the occurrence ofNIHL.