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Biomedical subjects

C W Wang

Publications and source records attributed to C W Wang.

At least 55 records · Page 3Linked to original sources
PubMed1995

Bowel injury by the suction-irrigator during operative laparoscopy.

Bowel injury is common during operative laparoscopy, yet injury by the suction-irrigator has never been reported to our knowledge. Any injury to the sigmoid colon by suction-irrigator occurred during intestinal retraction. Primary repair was performed through minilaparotomy incision. In addition to the potentially damaging effect of the instrument, a firm, distended, and unprepared bowel was a leading factor in this injury. We recommend that all patients have bowel preparation before operative laparoscopy, and that great care be taken for all surgical manipulations, even when employing traditionally atraumatic instruments.

Abdominal Muscles↗
PubMed1994

Alpha-fetoprotein in women during pregnancy and in the neonate during intrapartum.

To evaluate alpha-fetoprotein (AFP) levels in women during pregnancy and in the neonate, 256 singleton pregnancies without medical, gynecologic, obstetric, or neonatal complications were studied. Sera for measuring maternal AFP (MAFP) levels were taken in midtrimester (16 to 18 weeks), third trimester (32 to 34 weeks), and during intrapartum (38 to 41 weeks). For measuring umbilical arterial AFP (UAAFP) and umbilical venous AFP (UVAFP) levels, sera of newborn were taken from the umbilical cord at delivery. AFP levels were measured by radioimmunoassay. Our results show that the MAFP levels at third trimester were higher than during intrapartum or midtrimester. Birthweights correlated well with MAFP levels in midtrimester. However, they did not significantly correlate with the MAFP levels at third trimester or intrapartum, nor with UAAFP or UVAFP levels. UAAFP levels were not significantly different from UVAFP levels. Intrapartum MAFP correlated well with UAAFP but not with UVAFP, birthweight, or parity. The concentration gradient between fetal and maternal serum during intrapartum is approximately 750:1. We conclude that MAFP levels in midtrimester can reflect birthweight. The data of normal AFP gradient may also be useful for diagnosing intrapartum fetomaternal hemorrhage.

Analysis of Variance↗
PubMed1993

In situ remineralization of enamel lesions using continuous versus intermittent fluoride application.

Remineralization of early enamel lesions was studied in situ using a F chewing gum or a F-releasing device (FRD). Enamel specimens with subsurface lesions were mounted in removable lower appliances in 6 adults. A F-free dentifrice was used for all regimens. Test groups chewed five sticks/day (0.1 mg F/stick), or one FRD (0.5 mg F/day) was mounted in the midline of the appliance. The microhardness was measured after the 21-day intraoral exposure, and in vitro acid resistance testing was performed. Separate specimens were used to measure F content or changes in mineral density. Comparable values for both F gum and FRDs were higher (p > 0.05) than controls for acid resistance testing and percent remineralization. The F content for FRDs exceeded that of both F gum and controls.

Adult↗
PubMed1989

Allograft reconstruction for the treatment of long bone defects: report of 9 cases.

From April 1980 to December 1987, we experienced 18 cases of frozen intercalary allografts including 13 cases of bone tumor, 3 cases of congenital pseudoarthrosis of the tibia and 2 cases of traumatic bone defect. Nine cases were followed up for more than 2 years. The average allograft of length was 10.5cm (ranging from 3.5cm to 22cm). All cases had supplemental autografts in combination with intercalary allografts. The average time of radiographic union was 5 months (ranging from 4 months to 8 months) between allograft and autogenous cancellous bone graft, and 11.3 months (ranging from 7 months to 18 months) between allograft and host bone. We use the bone scan for early determination of the fate of allografts. The bone scan usually becomes positive at about 6 months after transplantation. The functional result was 89% "excellent" and "good" according to Henry J. Mankin's grading. One non-union and 3 leg length discrepancies of more than 2cm were encountered. In this study, we found that the deep frozen allograft for the treatment of large bone defects is very encouraging.

Adolescent↗
PubMed1988

Acetabuloplasty for congenital dislocation of the hip in children.

A modified acetabuloplasty, which has been employed at our hospital since 1977, is described for the treatment of congenital dislocation of the hip in children. The procedure has been performed on a total of 74 hips in 61 children (average age 6.7 years), with satisfactory results obtained in 87.8% of hips. The technique, its indications, and pre- and postoperative management are detailed. The procedure possesses the advantages of both the shelf and Pemberton procedures and has proved to be an effective operation for older children with poor acetabular development. Our results show that, when performed correctly, this procedure is simple, safe, and effective.

Acetabulum↗
PubMed1983

Comparison of two methods for bacteriocin typing of Serratia marcescens.

Two methods of bacteriocin susceptibility typing for Serratia marcescens were compared. A total of 80 epidemiologically unrelated isolates from patients in a single hospital were typed by the cross-streaking method and the mitomycin C-induced (spotting) method. The cross-streaking method was found to be more discriminatory than the spotting method. Using the cross-streaking method, it was possible to differentiate 50 bacteriocin groups out of the 80 isolates, whereas only 31 groups could be obtained with the spotting method. The reproducibility and percentage typability of the cross-streaking method (82.5 and 93.75%, respectively) were found to be as good as, if not better than, those of the spotting method (78.75 and 90.0%, respectively). Other factors, such as lower economic cost, technical simplicity, and the relative ease in the scoring of results, indicate a preference for the cross-streaking method. The findings of this study support the choice of the cross-streaking method for the bacteriocin typing of S. marcescens in epidemiological studies.

Bacteriocins↗
PubMedDate not supplied

[Percutaneous catheterization of internal jugular vein].

Percutaneous catheterization of internal jugular vein has been recognized as a valuable procedure during special conditions which need either a central venous pressure monitoring or a route for intravenous infusion either on a long term or short term basis. In our hospital we had 27 patients who had undergone 32 percutaneous internal jugular vein catheterizations over a period of 19 months. Patients' age ranged from 10 days to 13 year-old. Among these 27 patients, 20 were less than 1 year-old. Overall successful punctures were achieved in 87.5% of attempts. There was no case complicated with pneumothorax, hematoma, air embolization, pericardial tamponade or Horner's syndrome following the procedure. 68.7% of the procedure were done under emergency situation when peripheral venous route were inaccessible. In our experience, this procedure is a highly useful method of obtaining venous line in patient with inaccessible peripheral venous route.

Adolescent↗
PubMedDate not supplied

[Blood exchange transfusion as an emergency treatment for hyperleukocytosis in leukemia: report of one case].

An extreme leukocytosis imposes immediate and potential catastrophic problems, which warrant the use of intensive means to reduce the excessive leukocytes. Blood exchange transfusion has been used for emergency management of hyperleukocytosis. With few complications the procedure can rapidly reduce an excessive leukocyte burden, correct concomitant anemia and improve associated metabolic abnormalities. The greatest advantage of this procedure is that it can be performed in the shortest time, with minimal equipment and technical skill. This is a report of an 11-month-old male patient with acute lymphoblastic leukemia who had hyperleukocytosis, then received emergency blood exchange which reduced the leukocyte count from 630,000/ul to 70,000/ul in two hours. The course was smooth and the patient tolerated the procedure well. Remission was attained after the induction and consolidation chemotherapy, and the child is now under maintenance therapy.

Acute Disease↗