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Biomedical subjects

S L Zhu

Publications and source records attributed to S L Zhu.

18 recordsLinked to original sources
PubMed2005

Shock wave interaction with laser-generated single bubbles.

The interaction of a lithotripter shock wave (LSW) with laser-generated single vapor bubbles in water is investigated using high-speed photography and pressure measurement via a fiber-optic probe hydrophone. The interaction leads to nonspherical collapse of the bubble with secondary shock wave emission and microjet formation along the LSW propagation direction. The maximum pressure amplification is produced during the collapse phase of the bubble oscillation when the compressive pulse duration of the LSW matches with the forced collapse time of the bubble.

High-Energy Shock Waves↗
PubMed2001

Parity-violating photoproduction of pi(+/-) on the delta resonance.

We analyze the real-photon asymmetry A(gamma)(+/-) for the parity-violating (PV) pi(+/-) production on the Delta resonance via the reactions (-->)gamma + p --> Delta(+) --> pi(+) + n and (-->)gamma + d --> Delta(0) + p --> pi(-) + p + p. This asymmetry is nonvanishing due to a PV gamma N Delta coupling constant, d(Delta)(+/-). We argue that an experimental determination of this coupling would be of interest for hadron dynamics, possibly shedding light on the S-wave/ P-wave puzzle in the hyperon nonleptonic decays and the violation of Hara's theorem in weak radiative hyperon decays.

Journal Article↗
PubMed1991

Comparisons of diet and biochemical characteristics of stool and urine between Chinese populations with low and high colorectal cancer rates.

In an investigation of the roles of diet and stool biochemistry in human colorectal carcinogenesis, 24-hour food, urine, and stool samples were collected from randomly selected participants from two populations with a fourfold difference in colorectal cancer risk: Chinese in Sha Giao, People's Republic of China (low risk), and Chinese-Americans of similar ages in San Francisco County, Calif, in the United States (high risk). The findings supported the hypotheses that colorectal cancer risk is increased by the consumption of high-fat, high-protein, and low-carbohydrate diets and is associated with high levels of cholesterol in stool as well as increased daily outputs of 3-methyl-histidine and malonaldehyde in urine. However, risk does not increase with low stool bulk and low total stool fibers.

China↗
PubMed1991

The results of transplant livers from selected non-heart-beating cadaver donors.

The clinical experience following transplantation of livers obtained from non-heart-beating cadaver donors (NHBD) with the use of core cooling method is presented here. Six livers procured from such cadavers were transplanted into 6 recipients with hepatoma involving right and left lobes but without distant metastases. The first liver subjected to 75 minutes of warm ischemia had insufficient function after transplantation. The recipient died of graft failure 54 days later. The other 5 livers with 32 to 45 minutes of warm ischemia had a good or excellent immediate function. These 5 recipients died of tumor recurrence, acute rejection or septicemia 131 to 261 days after transplantation. The utilization of selected NHBD is suggested by our practice as a possible approach to help alleviate the acute organ shortage in the areas where heart-beating cadaver donors of brain death are not available.

Adult↗
PubMed1989

Evaluation of partial hepatectomy for primary liver carcinoma.

From 1964 to 1985, 120 cases of primary liver carcinoma had undergone hepatectomy in our hospital. Seven of these cases underwent hepatic lobectomy, 28 cases had palliative hepatic resection, and 85 cases had partial hepatectomy. We introduced different surgical modes and compared the mortality, survival rates, and complications between the hepatic lobectomy and partial hepatectomy groups. The mortality rates of these two groups were 14.3 and 3.5%, respectively, and the 1, 3, and 5 year survival rates were 83.3, 33.3, and 16.7 and 68.8, 48.1, and 20%, respectively. In the palliative hepatectomy group (28 cases), ten cases received combined radiotherapy postoperation. Most of these cases died during the first year postoperation. Primary liver cancer in Asia is commonly associated with hepatic cirrhosis. We suggest that partial hepatectomy is suitable for such patients. The results of the present series showed that the outcomes of the hepatic lobectomy and partial hepatectomy groups did not differ, but in partial hepatectomy, the operative mortality and complications were reduced, bleeding minimized, and operation time also shortened.

Adenoma, Bile Duct↗
PubMed1989

Allergenicity of orange juice and orange seeds: a clinical study.

Oranges are considered to be common allergenic fruits in China. They may induce severe food allergy in sensitive individuals. Allergic histories were analyzed in 26 orange-sensitive patients. Intradermal tests with extracts of orange juice and seeds were performed in 16 out of the 26 patients. P-K test was performed in one patient. The allergic history analysis suggested that clinical symptoms of some orange-allergic subjects were different from other fruit allergies but similar to nut and other oil plant seed allergies. The skin test and P-K test showed that the major allergenic components of orange reside in orange seeds instead of orange juice. Systemic reactions developed in 5 patients after intradermal tests with 1:20-200 (w/v) orange seed extracts. We considered that orange seed contains high potent allergens which may induce orange sensitivity due to careless chewing of orange seeds.

Adult↗
PubMed1988

[Surgical resection of 48 patients with malignant disease of the pancreas and periampullary region].

Fourty-eight patients with malignant disease of pancreas and periampullary region treated by surgery from Jan. 1966 to June 1985 are analyzed. Of these patients, 44 underwent pancreaticoduodenectomy, 2 had resection of the body and tail of pancreas, 1 had total pancreatectomy and 1 had tumor resection only. The operative mortality was 12.5%. The overall 5-year survival rate was 48.2%. The 5- and 10-year survival rates of the 44 patients by pancreaticoduodenectomy were 46.4% and 37.5%, respectively. Experience and technique on the postoperative complications were analyzed. The prevention of massive bleeding during operation were suggested. Apart from the cigarette drain to the pancreaticoduodenal bed, an easy and effective method for draining the digestive juice from the lumen near anastomosis of the pancreaticojejunostomy and choledochojejunostomy is suggested.

Adenocarcinoma↗
PubMed1987

[Evaluation of irregular hepatectomy for primary liver carcinoma].

From 1964 to 1985, 120 patients with primary liver carcinoma were treated by operation in our hospital. Regular hepatectomy was done in 7 patients, palliative irregular hepatectomy in 28 and radical irregular in 85. The operation mortality was 4.2% in irregular hepatectomy group (113 cases) but 14.3% in regular hepatectomy group (7 cases) (P greater than 0.05). The 1, 3 and 5 year survival rates were 68.8%, 48.1% and 20.0% in radical irregular hepatectomy group but 83.3%, 33.3% and 16.7% in regular hepatectomy group. 10 of 28 patients treated by palliative hepatectomy were added with radiation. Majority of these patients died in 1 year after operation but 2 patients survived for more than 2 years and 1 for more than 7 years. The data show that in Asia, the incidence of primary liver carcinoma concurrent with liver cirrhosis is high and irregular hepatectomy is a suitable treatment. There is no difference between irregular and regular hepatectomy groups in the prognosis. But the former could reduce the operative time, mortality and the possibility of bleeding and complications.

Adolescent↗