No abstract available.
Needles*

No abstract available.
Needles*

No abstract available.
Needles

No abstract available.
Needles* ; Prostatitis*

No abstract available.
Depression* ; Needles*

By the research of the characteristics and market using situation of all needle medical supplies, this paper sums up their development trend to provide reference for medical practitioners or the classification management of needle medical supplies.
Humans ; Needles

PURPOSE: The purpose of this study was to determine the factors influencing on the size of thermal lesions after ablation using an expandable radio-frequency needle electrode in porcine liver. MATERIALS AND METHODS: Ablation procedures involved the use of a monopolar radio-frequency generator and 15-G needle electrodes with four and seven retractable hooks (RITA Medical System, Mountain View, Cal.,U.S.A.). The ablation protocol in fresh porcine liver comprised of combinations of varying hook deployment, highest set temperature, and ablation time. Following ablation, the maximum diameter of all thermal lesions was measured on a longitudinal section of the specimen. Ten representive lesions were examined by an experienced pathologist. RESULTS: At 3-cm hook deployment of the needle electrode with four lateral hooks, the size of spherical thermal lesions increased substantially with increases in the highest set temperature and ablation time until 11 minutes. After 11 minutes lesion size remained similar, with a maximum diameter of 3.3 cm. At 2-cm hook deployment, sizes decreased to about 2/3 of those at 3 cm, and at 1-cm hook deployment lesions were oblong. At 3-cm hook deployment of a needle electrode with seven hooks, the size of thermal lesions increased with increasing ablation time until 14 minutes, and the maximum diameter was 4.1 cm. Microscopic examination showed a wide zone of degeneration and focal coagulation necrosis. CONCLUSION: The size of thermal lesions produced by the use of an expandable radio-frequency needle electrode were predictable, varying according to degree of hook deployment, highest set temperature, and ablation time.
Electrodes* ; Liver ; Necrosis ; Needles*

No abstract available.
Anesthesia, Spinal* ; Needles* ; Ultrasonography*

The authors analysed the findings of discograms in the 1355 levels of 900 herniated lumbar disc cases during May 1984 to January 1987. Prior to intradiscal injection of Chymopapain in the treatment of lumbar disc herniation, Conray contrast medium was injected. The discographic patterns were devided in five types:I) contained, II) degenerative, III) annular bulging, IV) subligamentous leak, and V) epidural leak type. Among the 5 types, annular bulging type was most common(38.7%). Discography was useful in the determination of a needle placement, intradiscal pathology, and Chymopapain injection or not.
Chymopapain ; Needles ; Pathology

Single dose glass ampules have been developed for ease of administration, accuracy of measurement of dosage, sterility and use in prepackaged kits. Glass particle contamination of the contents of single dose glass ampules can occur upon opening. In our study, we determined whether different ampule size, different aspiration techniques or different methods of ampule opening had any effect on glass particle contamination. Different ampule sizes (1, 2, 20 ml), different aspiration techniques (19G, 22G needle) and different methods of ampule opening (one point ampule, cutting with circular etching, cutting with one plane etching) were evaluated. There was no signifcant difference in the number of particles aspirated by any given aspiration technique, ampule size and method of ampule opening. But intravenous glass particle administration is associated with patholagic responses, so the use of a filter needle, and in-line filter devices and a low pressure infusion system is advised.
Glass* ; Infertility ; Needles