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At least 145 records · Page 8Linked to original sources
PubMed1996

Prevalence of HBsAg among the non cauterized groups of blood donors.

One thousand two hundred and seventeen (1217) blood specimens from non-cauterized blood donors were tested for HBsAg by counterimmunoelectrophoresis technique: 48 specimens were positive giving an incidence of 3.95%; specimens from 99 blood donors with cautery marks were tested side by side using the same technique, 3 specimens were positive giving an incidence of 3.05%. These results show that Sudan can be considered among the countries with very high prevalence of HBsAg. This emphasizes the importance of testing every unit of blood or blood product before transfusion. This high prevalence is mainly attributable to the use of common improperly sterilized water-boiled syringes, needles and surgical instruments. The results also show that the incidence of HBsAg among cauterized donors is not higher than among non-cauterized; thus routine rejection of cauterized citizens from giving blood at the reception stage is unjustified as it adds to the problem of shortage of blood in Sudan.

Adolescent↗
PubMed1986

Mutual neoplastic promotion by instillation of mitomycin C and cauterization on rat bladder urothelium.

The authors studied the effect of bladder instillation of mitomycin C (MMC), a potential carcinogen, on the duration and severity of the hyperplasia induced by transurethral fulguration. This experimental system may simulate closely the intravesical chemoprophylaxis of MMC after transurethral resection of bladder cancer. Physiologic saline or MMC was instilled into the rat bladder once on the day of, or 3 or 7 days after cauterization. In all groups instilled with physiologic saline the changes were reversed by day 14. On the other hand, five of nine MMC-instilled rats developed papillary lesions, and three of these had mild dysplastic epithelium on day 84. Under the scanning electron microscope, the animals of these groups showed pleomorphic microvilli on the luminal surface of the regenerative cells on days 10 and 14 after cauterization. These results may indicate the mutual neoplastic promotion by instillation of MMC and cauterization to a certain extent.

Animals↗
PubMed1988

Properties of electromagnetic field focusing probe.

The electromagnetic field focusing (EFF) apparatus consists of a radio frequency generator, solenoidal coil, and a hand-held or catheter probe. Applications such as aneurysm treatment, angioplasty, and neurosurgery in various models have been reported. The probe is operated in the near field (within one wavelength of an electromagnetic field source) of a coil inducing eddy currents in biological tissues, producing maximal convergence of the induced current at the probe tip. The probe produces very high temperatures depending on the wattage selected for the given radio frequency of output power. The high temperature can be used in cutting, cauterizing, or vaporizing. The EFF probe is comparable to different types of lasers and to bipolar and monopolar cautery. The EFF probe can be used with catheters or endoscopes. Objectives of this study were to determine what the thermal properties of the EFF probe are and how instrument parameters can be varied to obtain different temperatures in the tissue near the probe tip. In this study an F2 catheter was used as an insulated sheath and the tip of the guide wire was used as the probe tip. Different powers, wave forms, coil-to-probe distances, and probe-tip lengths were tested on a phantom that simulates tissue electrical properties. Some of the experiments were conducted under normal saline to simulate treatment of tissue with body fluids such as blood vessels or brain tissue under normal physiologic conditions. It is concluded that the EFF probe has the advantages of easy manipulation, relative safety, cost effectiveness, and a high degree of spatial control.(ABSTRACT TRUNCATED AT 250 WORDS)

Electrocoagulation↗
PubMed1975

Laryngeal structure following microcauterization.

This paper supports and reaffirms the objectives of contemporary laryngology in the treatment of cancer of this organmthese objectives are, first and foremost, the eradication of the tumor, and second, the preservation of function. A relatively recent contribution to the "state of the art" has been the development of the field of microlaryngology. The introduction of the surgical microscope has provided the laryngologist with better means to judge the type, localization and extent of neoplastic lesions. Reports indicate that superficial limited carcinomas of they larynx with good vocal cord mobility can be successfully treated by vocal cord stripping and/or radiotherapy. This paper presents the serious challenge posed by these limited tumors when they recur after radiotherapy. In a selected number of these patients radical surgery has been prevented by treating these recurrent tumors with the microcautery. Some of these patients, so treated, habe been free of disease for more than three years after their recurrent tumors were destroyed with the microcautery. During this time these patients have enjoyed adequate voices.

Aged↗
PubMed1979

Thermal injury to the bowel as a complication of laparoscopic sterilization.

Thermal injury to the small bowel occurred four times in a series of 7466 consecutive laparoscopies and tubal cauterization performed for sterilization. The four patients presented with signs and symptoms of delayed bowel perforation 4 to 11 days after the procedure. The perforations were small and involved the antimesenteric border of the terminal ileum. Histologic study of the excised specimen in one case showed full thickness coagulative necrosis of the bowel wall. Potential causes for bowel burn associated with tubal cauterization are discussed. Steps to minimize the occurrence of this complication include proper use of the laparoscope and cautery equipment, good anesthesia and gas distension of the abdomen, correct positioning of the patient and clear visualization of the operative field.

Adult↗
PubMed1979

Techniques for the lesion of the vomeronasal organ of the rat.

Two technical procedures were developed in order to suppress the vomeronasal organ (V.O.) of the rat. The organ was approached through the nasal or oral cavity and electrolytic or thermic lesions were respectively performed. For electrolytic lesions the projection of the organ on the nasal bone was first determined. After opening the nasal bones, the Vs. Os. were lesioned by way of an electric current applied through an electrode introduced between the mucosa and nasal septum. For thermic lesions, the projection of the V.O. on the palate's surface was determined. After opening this area and the underlying part of the maxillary bone, both Vs. Os. were cauterized.

Animals↗
PubMed1990

The effect of oxygen on corneal neovascularization.

Since tissue oxygen levels are believed to play a pivotal role in new vessel growth in several situations, we studied the effect of several oxygen concentrations (0, 10, 21, 50, 75, or 100%) on corneal vascularization induced in the rat by chemical cautery. We achieved this by perfusing known concentrations of oxygen through goggles fitted over both eyes of the rat after corneal cauterization. Neovascularization was measured in flat corneal preparations with India ink-filled vessels 4 days postcautery using computerized image analysis. The angiogenic response of rats whose eyes were continuously exposed to 0-75% oxygen were not significantly different from each other. The mean response in corneas exposed to 100% oxygen was 10-21% lower than all of the other groups, and this difference was statistically significant when compared to oxygen concentrations of 0, 21 and 75%. The reason for the inhibitory effect of 100% oxygen remains to be determined, but it may represent a toxic effect of oxygen free radicals on the vascular endothelium.

Animals↗
PubMed1989

A comparison of two methods of punctal occlusion.

We performed punctal occlusion by thermal cautery on 23 patients (45 sides, 90 puncta). One punctum on the right side was randomly assigned to deep cauterization of the punctum and vertical canaliculus, and the other punctum assigned to cauterization of the punctum only. The two treatments were assigned to the opposite puncta on the left side. One month after cauterization, the puncta that received deep cauterization were significantly more likely to have remained closed than those that received superficial cauterization (P less than .01). Survival analysis over a period of follow-up that exceeded one year after surgery, using time to examination because of a reopened punctum as the endpoint, indicated a long-term advantageous effect of deep over superficial cauterization.

Electrocoagulation↗