China ; Clinical Laboratory Techniques ; Laboratories ; statistics & numerical data ; Occupational Health ; Quality Control

Objective To compare the effects of propofol versus midazolam on serum hydrocortisone in the aged traumatic brain injury. Methods 64 patients (aged 65-72 years) with traumatic brain injury during mechanical ventilation were divided into propofol group (n=32) and midazolam group(n=32).The hemodynamics data,intracranial pressure(ICP) and the calculated cerebral perfusion pressure(CPP) were recorded.The serum hydrocortisone of patients was detectedby enzyme linked immunosorbent assay (ELISA) at 24 h,72 h and 4 weeks in intensive care unit(ICU). Results There was no differences in partial pressure of carbon dioxide,heart rate,meanartery pressure,pulse biood oxygen saturation (SpO2 ),armpit temperature,endexpiratory gas(PEr CO2),intraeranial pressure (ICP) and cerebral pertusion pressure (CPP) between the two groups (P＞0.05).The serum hydrocortisone in propofol group at 24 h and 72 h [(269.7±43.2) nmol/L and (235.0±67.0) nmol/L] were lower than in midazolam group [(278.0±75.5) nmol/L and (243.2±42.4) nmol/L] (t=5.312 and 5.919,both P=0.000).The serum hydrocortisone in propofol and midazolam group at 4 weeks were (209.1±73.9) nmol/L and (210.8±66.6) nmol/L,respectively,no significant difference was found(t=0.075,P =0.938). Conclusions There is a significant difference in the effects of propofol and midazolam on the early level of hydrocortisone in the aged patients with traumatic brain injury.

Objective To investigate the feasibility and results of the application of both expanded cutaneous flap and temporoparietal fascia flap in total ear reconstruction with Medpor framework.Methods The main procedures consisted of three stages:stage Ⅰ-skin expansion,stage Ⅱ auricle formation that consisted of orientation of Medpor implant and creation of coverage for the implant by both expaned skin flap and temporoparietal fascia flap,and stage Ⅲ-treatment of residual ear and recontruction of auricular lobule. Results Twenty-two ears in 22 unilateral microtia patients were constructed using Medpor implants covered with both expanded cutaneous flap and temporoparietal fascia flap over the last three years,and they were accepted as pleasing by the patients.Conclusions Application of both expanded cutaneous flap and temporoparietal fascia flap can assure no extrusion of Medpor implant in ear reconstruction.Further more,the two layers of transferred tissues will not affect the profile details of the reconstructed ear.And because the skin covering the framework and fascia is derived from frommastoid region,the appearance and profile of the reconstructed auricle is true to nature and close to that of the opposite one.

Arsenic ; urine ; Freeze Drying ; standards ; Humans ; Reference Standards ; Urinalysis ; methods ; standards

Humans ; Mercury ; blood ; urine ; Spectrometry, Fluorescence ; methods ; Spectrophotometry, Atomic ; methods

Objective To study the pharmacokinetics and pharmacokinetic parameter of resveratrol (RES) crude drug and solid dispersion (RES-PEG) in rats. Methods HPLC-UV was established for detecting plasma concentrations of RES and investigating its pharmacokinetics in rats with ig and iv administration. The software of DAS3.0 was used to process the pharmacokinetic parameters. Results The linear calibration curve was obtained in the range of (10-2.5 × 104) ng/mL for RES, and the lower limit of quantitation was 10 ng/mL. Intra- and inter- day precision for all samples were less than 5.1%, and the accuracy of three different concentrations was in the range from -1.1% to 0.7%. The extraction recovery of RES from rat plasma was from 97.8% to 104.1%. The main pharmacokinetics parameters of RES crude drug and RES-PEG after ig administration, and RES after iv administration were shown as follows: t1/2, (2.6 ± 2.0), (2.3 ± 0.8), and (6.3 ± 1.1) h; AUC 0-12, (514.7 ± 117.5), (1 084.6 ± 836.9), and (2 697.3 ± 289.8) ng∙mL/h, respectively; the Cmax of RES crude drug and RES-PEG after ig administration were (473.3 ± 200.8) and (814.1 ± 246.6) ng/mL, respectively. Compared to crude drug, the relative bioavailability of of RES-PEG was about 200%; And the absolute bioavailability of RES crude drug was 5%. Conclusion The oral bioavailability of RES was low. The relative bioavailability of RES crude drug was significantly improved after being prepared into solid dispersion.

To investigate the effects of mycophenolate mofetil (MMF) on the process of renal interstitial fibrosis, unilateral ureteral obstruction (UUO) model was established in rats. Twenty Sprague-Dawley rats underwent UUO and received vehicle (n = 10) or MMF (20 mg.kg-1.d-1, by daily gastric gavage, n = 10) during a period of 5 days following surgery, and the additional 10 rats were served as sham-operated group. The rats were killed 5 days after surgery. Immunohistochemistry was performed on renal tissue for proliferating cell nuclear antigen (PCNA), alpha-smooth muscle actin (alpha-SMA) and type I and III collagen (col I, col III). Histological studies were also done by MASSON staining. Five days after surgery, proliferating cells in tubules, interstitium as well as interstitial myofibroblast (MyoF) infiltration and interstitial col I, col III deposition were all significantly reduced by MMF treatment. MMF also alleviated the histological changes of UUO rats. These results suggested that the reduction of interstitial MyoF infiltration may be an important event by which MMF prevents renal injury caused by UUO and MMF could be used to limit the progression of renal fibrosis.
Fibrosis ; Kidney/*pathology ; Kidney Diseases/etiology ; Kidney Diseases/pathology ; Kidney Diseases/*prevention & control ; Mycophenolic Acid/*analogs & derivatives ; Mycophenolic Acid/*pharmacology ; Random Allocation ; Rats, Sprague-Dawley ; Ureteral Obstruction/*complications

Objective To explore relationship between imaging classification and pathological type,and the electron microscopic ultrastructure by observing the ultrastructural features of congenital cystic adenomatoid malformation (CCAM).Methods Children with CCAM in the Guangdong Women and Children Hospital from May 2014 to November 2014,were analyzed,imaging classification was performed according to enhanced Computed Tomography (CT) scanning,and the surgical specimens were stained by HE and scanning electron microscope was used to observe the tissue structures of various of CCAM.Results Eight cases were enrolled in this research (5 boys and 3 girls),and the mean age of surgery was (5.4 ± 1.1) month old.According to the features of enhanced CT scanning,there were 2 cases of the type-Ⅰ,and the other 3 cases of type-Ⅱ,and 3 cases of type-Ⅲ;According to the characteristics of the pathological types,there was 1 case of type-Ⅰ,4 cases of type-Ⅱ,and the other 3 cases of type-Ⅲ.There was 1 case which classified as type-Ⅰ by CT,however classified as type-Ⅱ by pathological typing.The findings of CT features were in complete correspondence with the pathological types in the rest cases.Electron microscopic findings showed the alveolar spaces were enlarged,the alveolar cells were reduced,the lamellar bodies were decreased and immature and microvilli were also decreased.There was no significant difference between Ⅰ and Ⅱ type under the viewpoint of electron microscope.The common features between type Ⅰ,and type Ⅱ included that the alveolar space was enlarged,the alveolar space had been pressed between enlarged alveolar space,the alveolar cell were decreased and immature,and fibrous hypertrophy was also found.Conclusions There are differences between ultrastructural analysis and clinical pathological typing which suggests the clinical importance of the electron microscopy ultrastructural analysis combined with pathology for typing.There need further clinical and laboratory studies,especially the combination of microscopy-electrical control microscope for typing with related predictive models for follow-up of CCAM.

Objective To study the relationship among apoptosis,NF-KB activation and uPA expres- sion in human colon carcinoma cell line HCTll6 induced by 5-fluorouracil,and to observe the effect of in- hibiting activity of NF-KB by PDTC on apoptosis as well as expression of uPA.Methods Cell apoptosis was analysed by Annexin V-FITC.Fluctuation of NF-KB and uPA was detected by semi-quantitative immuno- histochemistry.Results 5-fluorouracil could induce apoptosis and activate NF-KB.PDTC could significantly increase the apoptosis and suppress the activation of NF-KB induced by 5-fluorouracil.There was a positive correlation between the changes of uPA and NF-KB.Conclusion 5-fluorouracil could induce apoptosis,ac- tivate NF-KB and up-regulate expression of uPA of HCT116 cells.The mechanism of enhanced apoptosis by PDTC may be related to suppressing activation of NF-?B and down-regulating expression of uPA.