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Biomedical subjects

Z L Ji

Publications and source records attributed to Z L Ji.

27 records · Page 2Linked to original sources
PubMed1994

Percutaneous endoscopic polypectomy of gallbladder polyps.

We report here our preliminary experience with percutaneous endoscopic polypectomy of gallbladder polyps. Five patients with a total of 17 cholesterol polyps (size: 4-6 mm) and one patient with two gallbladder adenomas (size: 5 mm), four of whom were symptomatic and all of whom refused cholecystectomy, underwent a single-stage procedure under epidural anesthesia. All patients had functioning gallbladders, as assessed by oral cholecystography after stimulation. Following a small incision, the gallbladder was pulled out of the abdominal wall, incised, and a cholecystoscope introduced. The polyps were coagulated at their stalk using microwave irradiation (70-80 mA, 9 sec) and removed for histopathological evaluation thereafter. A catheter was left in situ for ten days. Follow-up for a mean of 11.6 months (8-16 months) showed all patients to be symptom-free and without recurrence of polyps on ultrasonography. Gallbladder function was assessed in five cases by meal-stimulated oral cholecystography, and in one by hepato-iminodiacetate acid (HIDA) scan and was found to be well preserved. The preliminary results warrant further evaluation of this method of removing indeterminate gallbladder polyps.

Adult↗
PubMed1993

[Skin carcinoma arising from scar (a report of 6 cases)].

In the past 20 years, we had seen 6 patients of carcinoma arising from scar, accounting for 0.78% (6/765) of all inpatients with scars and 17% (6/35) of all skin carcinoma patients. The causes were thermal burn, radiation burn and trauma. In 2 cases of radiation burn, one was irradiated for the treatment of hairy legs with 60Co. The carcinoma was diagnosed 6 years after irradiation, and he died of bone sarcoma 12 years after irradiation. In a patient, X-ray irradiation was given for keratosis of the palm, and scar carcinoma of palm developed 22 years after radiation. Scar carcinoma is a highly differentiated squamous cell carcinoma in most of the cases. Because of scar fibrosis and thrombosis of blood vessel and lymphatic vessel, the growth of scar carcinoma is slow. The metastasis is restricted. If the carcinoma can be diagnosed and treated early, the prognosis is favorable. The principle of operation is wide excision of the lesion. In some cases amputation is a safe but radical surgery.

Adult↗
PubMed1991

Cystic duct occlusion by microwave tissue coagulator in rabbits.

In this preliminary study a flexible bipolar microwave electrode, 1.8 mm in diameter, was designed to occlude the cystic duct in 18 rabbits. Thermal model tests were performed to evaluate the effect of the antenna and to master the coagulating condition. Through surgical cholecystostomy, the antenna was inserted into the proximal cystic duct for various coagulation treatments. Cholecystography showed that the cystic duct was occluded minutes to hours after coagulation. Histologically, the microwave technique induced a chronic inflammation and fibrosis which eventually obliterated the coagulated cystic duct permanently. In group A (30 mA for 20 s) the cystic duct epithelium regeneration occurred and surrounding liver damage was limited, while in groups B (50 mA for 10 s) and C (70 mA for 6 s) no epithelium regeneration was observed and injury to the liver was mild to moderate. It was found that microwaves generated at 50 mA for 10 s to occlude the rabbit's cystic duct are effective and less injurious.

Animals↗
PubMed1987

Effect of paclobutrazol on water stress-induced abscisic Acid in apple seedling leaves.

Abscisic acid (ABA) was quantitated by enzyme-linked immunosorbent assay (ELISA) in water-stressed leaves from control apple seedlings, and also from apple seedlings treated for 28 days with paclobutrazol ([2RS, 3RS]-1-[4-chlorophenyl]-4,4-dimethyl-2-[1,2,4-triazol-1-yl] pentan-3-ol). The ELISA quantitative estimates were also validated by gas chromatography-electron capture detector and lettuce seed germination inhibition bioassay. Paclobutrazol treatment reduced endogenous ABA levels by about one-third, and prevented the marked accumulation of water-stress-induced ABA that occurred in untreated seedlings. The presence of ABA in the apple leaf extracts was confirmed by gas chromatography-mass spectrometry.

Journal Article↗
PubMed1985

Microvascular free flap based on the medial femoral main cutaneous artery.

This article introduces a free flap based on the medial femoral main cutaneous artery. Flap transfer was carried out in two cases with complete postoperative success. An anatomical description of the midportion of the medial femoral region, based on magnification and binocular dissection microscope studies is provided, and the operative procedure is described.

Adult↗
PubMed1984

Reconstruction of metacarpophalangeal joint by free vascularized autogenous metatarsophalangeal joint transplant.

Six cases of autotransplantation of free vascularized second metatarsophalangeal joint to reconstruct damaged metacarpophalangeal (MP) joints are reported. Anatomical studies in cadaver and clinical cases involving the origin, course, and importance of preserving the articular branch of the metatarsal artery are described. Follow-up of cases from six months to 21/2 years postoperative reveal recovery of thumb function, stability of the transplanted joint, and no obvious degenerative changes.

Adult↗