Objective To perform the comparative analysis on the use situation of 3 kinds of dry chemical analyzers according to the industrial standards YY/T0655-2008.Methods With the Roche Cobas P800 automatic biochemical analyzers as the reference instrument,the accuracy,intra-assay precision,linearity,etc.in 3 kinds of dry chemical analyzers were evaluated.Results 3 kinds of dry chemical analyzers met the requirements of the industrial standards YY/T0655-2008,but the precision of imported instrument was significantly better than that of the domestic instrument.Conclusion In order to ensure the comparability and consistency of the detection results among instruments,the instruments should be regularly calibrated and performed the comparative experi-ments,the premise of calibration and comparison should be using 1/4 of the precision level in the CLIA′88 indicators as the indica-tor,not satisfying with the precision requirements in YY/T0655-2008,only in this way can the waste of blood and donors going a-way be avoided.

Objective To evaluate the economic effects of Imipenem-Cilastatin Sodium and Meropenem for severe infection.Methods The therapeutic effects and costs of the two therapeutic schemes for severe infection were evaluated by using cost-minimization analysis.Results The total effective rates of Imipenemcilastatin group and Meropenem group in the treatment severe infection were 93.33％ (28/30) and 85.71％ (24/28),the difference were not statistically significant (x2 =4.89,P =0.082).The cost-effectiveness ratio (C/E) were 40.35 and 71.69 respectively.The cost of every unit increment of effectiveness for Meropenem group were 312.16 Yuan,more than that of the Imipenem-cilastatin group.Conclusion Cost-effectiveness ratio of Imipenem-cilastatin is superior to that of Meropenem,and Imipenem-cilastatin has obvious pharmacoeconomics advantage over Meropenem for severe infections.

Objective: Our purpose was to observe the effect of epithelial scrape injury on corneal morphology. Methods: Twenty 4-week-old white rabbits were used. We scraped the corneal epithelia of the left eye of each rabbit (0.2 mm near the limbus of corneal were left in 10 eyes, in the remaining rabbits within 8 mm in the center). The right eyes were control group. We observed the healing of corneal protrusion with slit-lamp microscope, examined the corneal form with corneal topography, and measured the depth of anterior chamber and the corneal thickness with A-ultrasound. Results: The extensive epithelial scrape significantly increased the healing time. The corneal protrusion of experimental group and the depth of anterior chamber increased. The corneal thickness became thinner. Conclusion: The extensive epithelial injury can make cornea thinner, which results in the changes of corneal protrusion.

BACKGROUND: Thoracodorsal artery perforator flap can relieve damage to donor site and avoid bulk in the recipient site,but dissociation of perforating branch took time.Some one believed that it should be done by very experienced physicians and some muscle tissues should be reserved.OBJECTIVE: To investigate the method,effectiveness and clinical application of improved latissimus dorsi flap based on perforator flap conception for reconstruction of soft tissue defects of lower extremity.METHODS: A total of 17 patients needing skin flap transplantation were selected.12 latissimus dorsi musculocutaneous/muscle flaps,3 latissimus dorsi flaps with a few muscle and 2 double-leaf segmental latissimus dorsi compound flaps were designed based on perforator flap conception.According to the territory of latissimus dorsi musculocutaneous flap,a skin paddle in which anterior underlying muscle and main perforator was designed,extend about to the anterior edge of the latissimus dorsi muscle.An additional latissimus dorsi muscle flap was selected for soft tissue enlargement if necessary.Sometimes,double-leaf segmental latissimus dorsi musculocutaneous/muscle flap,including one muscle-sparing latissimus dorsi musculocutaneous flap and the other segmental latissimus dorsi muscle flap nourished by the lateral branches of the thoracodorsal vessels was selected to repair two adjacent defects.The harvested tissue area ranged from 12 cm×8 cm to 28 cm×17 cm.Survival state of skin flap,together with shape and function of donor site and recipient site of skin flap were observed.RESULTS AND CONCLUSION: Following skin flap transplantation,one case developed vascular crisis that was relieved following re-exploration for vessel anastomosis.All skin flap survived.Second-stage skin grafting was done on one muscle flap wound.All donor sites were sutured directly.After a follow-up of 3 to 18 months in 15 cases,only two cases received two-stage plastic operation because bulky flaps brought some trouble in wearing shoes.Improved latissimus dorsi flap based on perforator flap conception can reduce damage to the donor site and the receipt area bulk.Double-leaf segmental latissimus dorsi compound flaps can repair both heel and toe wound.The versatile latissimus dorsi flap designed using thoracodorsal artery perforator flap conception is an ideal flap for repairing widespread soft tissue defects in the lower extremity.

Objective:To study the effects of different processes on diosgenin content in polygonatum from Shaanxi. Methods:The content of diosgenin was determined by HPLC on a column of Woburn C18 (250 mm × 4. 6 mm, 5 μm) with the mobile phase of acetonitrile-water(90 ∶10)at the flow rate of 1.0 ml·min-1, the detection wavelength was 203 nm, the column temperature was 30℃, and the injection volume was 30 μl. Results:The linear range of diosgenin was 0. 892-5. 352 μg(r=0. 999 9), and the aver-age recovery was 99. 5% (RSD=2. 53%). The content of diosgenin was significantly various among the samples of polygonatum with different processes from Shaanxi (P<0. 05), and that in the raw slices was the highest followed by the steam samples, while that in al-cohol evaporate slices was the lowest. Conclusion:The results of the research can provide reference for the quality control and process-ing methods of polygonatum from Shaanxi.

Objective:To investigate the attentional bias for negative emotional facial expressions in major depressive disorder(MDD).Methods:Twenty MDD participants were selected from a larger pool of patients (n=35),diagnosed as depression with the Chinese Classification and Diagnostic Criteria of Mental Disorders Version 3 (CCMD-3),according to the Hamilton Depression Scale (HAMD) and Beck Depression Inventory (BDI).And 20 non-depression control participants(NC)matched with MDD group on age,gender and education level.All participants completed an exogenous cueing task which consisted of two kinds of cue types(valid and invalid trial)and two kinds of face types(neutral faces and negative faces).Results:Patients with MDD showed more larger cue validity effect for negative faces compared with neutral faces(21.73 ms vs.3.91 ms,P<0.01).They showed a stronger attentional engagement for negative faces in comparison with non-depressed participants(17.25 ms vs.1.64 ms,P<0.001).The NC group directed attention away from negative faces,more rapidly disengaging their attention compared with MDD,but the differences showed no significant(-1.50 ms vs.0.57 ms,P>0.05).Conclusion:These results support the assumption that MDD is associated with attentional bias for negative information,and deficits protective bias for it.

Objective: To investigate the application of free medial thigh chimeric myocutaneous perforator flap in the reconstruction of tongue defect after radical resection of tongue carcinoma. Methods: From June 2013 to November 2015, 17 cases with tongue carcinoma underwent radical resection and tongue and mouth floor defects after surgery were reconstructed with medial thigh chimeric myocutaneous perforator flaps at the same stage. These 17 cases included tongue carcinoma on lingual margin (n=9), ventral tongue (n=7) and mouth floor (n=1). Appearance and functional results were evaluated with follow-up. Results: Medial thigh chimeric myocutaneous perforator flap was (9.0±0.3) cm in length, (4.5±0.3) cm in width , and (1.8±0.4) cm in thickness. The length of pedicle was (7.4±0.6) cm. All of the 17 flaps survived uneventfully, and the donor sites were closed directly in all cases. All patients were followed up for 10-28 months with satisfied esthetic and functional results in reconstructed tongue. Aside from linear scar in the donor sites, the functions of thighs were not affected. No local recurrence occurred. Conclusion The free medial thigh chimeric myocutaneous perforator flap is an ideal choice to reconstruct the tongue and mouth floor defect after radical resection of tongue carcinoma.

Objective:To explore the necessity of combined transverse upper gracilis flap and adductor magnus perforator flap in breast reconstruction.Methods:From December 2016 to February 2019, 16 female breast cancer patients, aged 27-59 years, with an average of 40.3 years, were treated in the Department of Oncoplastic Surgery, Hunan Cancer Hospital. The tumors were unilateral in 9 cases on the left side and 7 cases on the right side, with a diameter of 1.5-4.5 (2.9±0.3) cm, and all of them were stage I. Pathological diagnosis included 9 cases of invasive ductal carcinoma and 7 cases of invasive lobular carcinoma. After the modified radical mastectomy, the medial thigh perforator flap was used to reconstruct the breast. Patients were randomly divided into group A and group B. In group A, the gracilis myocutaneous flap combined with the adductor magnus perforator flap was elevated. In group B, the adductor magnus perforator flap with large size reaching the front edge of gracilis muscle was directly harvested. After all the flaps were harvested with only one major adductor perforator as vascular pedicle, ICG fluorescence imaging technology was used to verify the blood supply of the flaps.Results:Eight cases of gracilis myocutaneous flap combined with adductor magnus perforator flap and 8 cases of adductor magnus perforator flap were transplanted, The length, width and thickness of the flaps were (27.5±0.4) cm, (7.1±0.5) cm and (3.8±0.4) cm, (7.4±0.3) cm and (10.8±0.5) cm respectively. The average weight of the flap was 255 g (195 g-315 g). The mean ischemia time was 75 min (55-90 min). In 16 cases, the proximal and distal ends of internal mammary vessels were used as the recipient vessels. Only anastomosing the adductor magnus perforator vessels could ensure the reliable blood supply of the flap. All flaps survived successfully in one stage. The appearance of reconstructed breast was good and there was no obvious flap contracture and deformation. 16 cases were followed up for an average of 12.5 months, and the patients＇ self perception and appearance were satisfactory. Only hidden linear scar was left on the donor site of the medial thigh flap, and the function of hip joint and leg was not affected.Conclusions:Large size of medial thigh perforator flap pedicled with the perforator of adductor magnus can be safely and reliably cut with no needing additional harvest of gracilis muscle vascular pedicle.

Objective To observe the outcome of free TAAP flap in the reconstruction of defect after oral tumor radical resection.Methods From June,2010 to April,2015,12 patients with oral tumor underwent radical resection,including 4 cases of gingival carcinoma,3 cases of tongue carcinoma and 5 case of buccal cancer.The cause ranged from 2 to 12 months.The radical resection left defects with size ranged from 4.5 cm×3.5 cm to 6.0 cm× 4.5 cm which were reconstructed by free TAAP flaps with size ranged from 7.0 cm×4.0 cm to 12.0 cm×8.0 cm.The length of TAAP flap was (6.5±0.6) cm.The width of flap was (4.3±0.5) cm.And the thickness of flap was (1.1±0.3)cm.The length of pedicle was(8.4±0.2) cm.All the arteries of TAAP were anastomosed with superior thyroid arteries,while the venae comitans were anastomosed with superior thyroid venae or internal jugular venae.Results The perforators existed consistently.All 12 flaps survived uneventfully.The donor sites were closed directly in all cases.All patients were followed up for 14-38 months with satisfied esthetic and functional results in reconstructed tongue.No local recurrence happened.The shoulder function was not affected.Conclusion The TAAP flap has consistent blood supply,good color match and texture,while leaving minimal morbidity at donor site,is an ideal choice for buccal tumor reconstruction.

Objective: To observe the outcome of relaying anterolateral thigh (ALT) perforator flap in resurfacing the donor site wound following free anteromedial thigh (AMT) perforator flap transfer for reconstruction of defect after oral tumor radical resection. Methods: From January 2013 to January 2016, 28 patients with oral tumor underwent radical resection in our hospital, leaving defects with size ranged from 6.5 cm×3.5 cm to 11.0 cm×7.5 cm which were reconstructed by free AMT perforator flaps with size ranged from 7.0 cm×4.0 cm to 12.0 cm×8.0 cm. All the arteries of AMT perforators were anastomosed with superior thyroid arteries, while the venae comitants were anastomosed with superior thyroid venae or internal jugular venae. The donor site wounds of free AMT perforator flaps were reconstructed by relaying ALT perforator flaps with size ranged from 8.0 cm×3.5 cm to 14.0 cm×7.5 cm. The relaying ALT perforator flap and wound edge were closed directly with layer interrupted suture. Postoperatively, the patients stayed in bed and received diet through nasal feeding tube, and the ordinary diet and lower extremity exercise were carried out from one week after operation. Results: The AMT and ALT perforators existed consistently in all patients. In 16 patients the venae comitants of AMT perforator arteries were anastomosed with superior thyroid venae in end-to-end fashion, while in 12 patients with internal jugular venae in end-to-side fashion. All flaps survived uneventfully about 2 weeks after operation, and the wounds healed smoothly. All patients were followed up for 6 to 30 months after operation. The sites repaired with free AMT perforator flaps were not bulky in appearance, with two-point discrimination distances ranged from 8 to 15 mm. The movement of tongue was not obviously affected, and patients could speak and eat normally. The texture and color of the sites repaired with relaying ALT perforator flaps were close to those of the adjacent tissue, and the two-point discrimination distances of the sites repaired with relaying ALT perforator flaps were ranged from 7 to 12 mm. The function of thigh was not obviously affected, and patients could walk normally and do related daily activities. Conclusions Reconstruction of defect after oral tumor radical resection with free AMT perforator flap can achieve good outcome, and wound in the donor site of free AMT perforator flap repaired with relaying ALT perforator flap can achieve good appearance and function recovery.