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Results for “Electrocoagulation”

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PubMed1984

The influence of cryosurgery and electrocoagulation upon metastatic spread.

An experiment was performed to investigate the hypothesis that cryosurgery or electrocoagulation of a tumor can have an inhibitory effect upon the metastatic process. Prior investigation had shown that both electrocoagulation and cryosurgery were as effective in causing a local cure of tumor as local excision. An intravenous injection of tumor cells was given a week after local treatment of 10-day-old subcutaneous tumors had been administered, and 2 weeks later the number of lung metastases was counted. No extra beneficial effect of cryosurgery or electrocoagulation upon the metastatic process could be demonstrated, neither with the antigenic tumor system used nor with two nonantigenic systems.

Animals↗

PubMed1982

Five year survival in patients with carcinoma of the rectum treated by electrocoagulation.

Sixty-eight patients with rectal cancer treated by electrocoagulation are reviewed. All were followed up for a minimum of 5 years. The survival rate in patients with small exophytic cancers is greater than 70 percent. However, the recurrence rate after electrocoagulation is 40 percent. Electrocoagulation offers an alternative for the primary treatment of rectal cancer, particularly in older patients with small lesions.

Adenocarcinoma↗

PubMed1988

Four-year follow-up of electrocoagulation and tubal ring sterilizations in Costa Rica.

An earlier analysis of 299 laparoscopic sterilizations comparing electrocoagulation and tubal ring occlusion techniques found no significant differences in rates of surgical complications. The risk of potentially serious complications, such as bowel/bladder burns, was considered higher with electrocoagulation be the preferred technique. Examination of the same women through 48 months poststerilization between the two techniques with respect to the incidence of gynecologic surgery performed subsequent to sterilization. Gynecologic abnormalities were similar for women in both groups. The rate of pregnancy was higher for tubal rings than for electrocoagulation (2.1 compared to 0.7 at 48 months) but this difference was not statistically significant.

Electrocoagulation↗

PubMed1987

Open field activity and passive avoidance responses in rats after lesion of the central amygdaloid nucleus by electrocoagulation and ibotenic acid.

The effect of two types of bilateral lesion of the central amygdaloid nucleus on open field activity and on the acquisition of a passive avoidance conditioning in a run way was studied in male Wistar rats. The animals were divided into three groups: sham-operated, a group with lesions caused by electrocoagulation, and a third group lesioned by local application of ibotenic acid. Ibotenic acid is a neurotoxin which damages the neurons but spares the passing fibres. The results indicate that lesion by electrocoagulation leads to a significant increase in the number of rearing responses in the open field. Moreover, lesion by electrocoagulation, but not by ibotenic acid, leads to a deficit in the acquisition of passive avoidance conditioning. This latter result suggests that the deficit is caused by lesion of the fibres crossing the central amygdaloid nucleus and not by the intrinsic elements of the nucleus.

Amygdala↗

PubMed2005

Contribution to the study of electrocoagulation mechanism in basic textile effluent.

Electrocoagulation method with iron electrode is used to treat the industrial textile wastewater in batch reactor. The effects of operating parameters such as time and potential electrolysis on the decolourization and COD removal efficiency have been investigated. The results indicate that electrocoagulation is very efficient and able to achieve 100% colour and 84% COD removal in 3 min at potential 600 mV. The effluent wastewater is very clear and its quality exceed the direct discharge standard. Furthermore, the mechanism of electrocoagulation is elucidated by zeta potential measurement.

Coloring Agents↗

PubMed1993

Adhesion formation after laparoscopic electrocoagulation of the ovarian surface in polycystic ovary patients.

OBJECTIVE: To evaluate the incidence and extent of periovarian adhesion formation subsequent to laparoscopic electrocoagulation of the ovarian surface in infertility patients with polycystic ovarian disease (PCOD). DESIGN: From a total of 199 PCOD patients treated with ovarian electrocautery, 50 cases of laparoscopy and 12 cesarean sections served as second-look investigation. A subgroup of 30 patients had abdominal lavage and artificial ascites after surgery; they underwent "early" second-look (2 to 14 days after laparoscopy). SETTING: All patients were referred to our fertility outpatient clinic affiliated with the university hospital. PATIENTS: Infertility patients with polycystic ovarian reaction to hormonal stimulation therapy underwent laparoscopic electrocoagulation of the ovarian surface. RESULTS: Adhesion formation was detected in 19.3%; the incidence reduced to 16.6% with the use of abdominal lavage. The adhesions found were obviously due to bleeding of the ovarian capsule caused by electrocautery. Adhesiolysis was easily possible during "early" second-look. CONCLUSION: The incidence of de novo adhesion formation caused by laparoscopic electrocoagulation of the ovarian surface seems to be lower than after ovarian wedge resection; it can be reduced by abdominal lavage and artificial ascites.

Electrocoagulation↗

PubMed1998

Reproductive outcome after treatment of mild endometriosis with laparoscopic excision and electrocoagulation.

OBJECTIVE: To compare the pregnancy rates (PRs) of infertile women with mild endometriosis treated laparoscopically by surgical excision and by electrocoagulation. Laparoscopic treatment of minimal and mild endometriosis usually is done by laser or electrocoagulation. Whether surgical excision is associated with similar results is unknown. DESIGN: Retrospective study with a historical control. SETTING: University teaching hospitals. PATIENT(S): One hundred one infertile women undergoing laparoscopic treatment of mild endometriosis. INTERVENTION(S): Forty-eight women were treated with electrosurgery (historical control) and 53 women were treated with excision. MAIN OUTCOME MEASURE(S): The PRs of the two groups of women were evaluated using life-table calculations and the Mantel-Cox test. RESULT(S): Of the total 24 pregnancies (PR: 57.1%) in the electrosurgery group, there were 3 spontaneous abortions (12.5%) and 1 ectopic pregnancy (4.2%). The total PR in the excision group was 53.5%, the abortion rate was 17.4% (4 of 23), and the ectopic PR was 8.7% (2 of 23). The median interval between surgery and conception was 10.7 months in the electrosurgery group and 13.3 months in the excision group. There was no statistically significant difference in the probability of conception between the two groups of women (Mantel-Cox test: z = 0.24). Using the Cox proportional-hazards model, the effects of age and duration of infertility were evaluated and were found not to be associated with a decreased PR. CONCLUSION(S): There is no difference in the PRs of infertile women with mild endometriosis treated laparoscopically by surgical excision and by electrocoagulation. The difference between these two modalities in women with endometriosis-related pelvic pain remains to be determined.

Adult↗

PubMed1980

Electrocoagulation of actively bleeding Mallory-Weiss tears.

Thirty patients with upper gastrointestinal bleeding due to a Mallory-Weiss tear were diagnosed by endoscopy. Seventeen patients had stopped bleeding spontaneously, and 13 were actively bleeding when examined. Ten of these 13 were successfully electrocoagulated with cessation of bleeding without morbidity or mortality. Total cost and length of hospitalization were approximately one-third for those treated by electrocoagulation as compared to surgery. Endoscopic electrocoagulation of actively bleeding Mallory-Weiss tears is often successful and appears to be safe.

Adolescent↗

PubMedDate not supplied

Artery weld strength after bipolar electrocoagulation is affected by electrolyte solutions around the artery.

We have recently shown that artery weld strength is significantly increased by increasing bipolar electrocoagulation time in fresh rabbit arteries, which had either 2 or 20 seconds of electrocoagulation under uniform conditions. In this study we investigated the effect of using either distilled water or physiologic saline around the artery during electrocoagulation in a total of 27 experiments, because it is the current practice to wash clot and liquid blood off bleeding ulcers with water. Fresh rabbit arteries were used, with a bipolar coagulation time of 2 seconds, with a constant weight of 500 gm applied to the head of the probe to standardize conditions. The bursting pressure of the coagulum was determined by cannulating the artery and increasing the pressure until the coagulum seal fractured. The artery weld strength was significantly lower when distilled water was used (median, 87.5 mm Hg; range, 10 to 225 mm Hg) compared with results when normal saline was used (median, 150 mm Hg; range, 100 to 850 mm Hg); by Mann-Whitney tests U = 42.5, Z = 2.36, and p = 0.018. These data suggest that more effective hemostasis of bleeding arteries may be achieved by not only more prolonged use of the diathermy probe, but also by using physiological saline as the washing solution instead of water, as is currently practiced.

Animals↗

PubMed1996

Treatment of polycystic ovary disease with laparoscopic low-watt bipolar electrocoagulation of the ovaries.

STUDY OBJECTIVE: To assess the efficacy of laparoscopic low-watt bipolar electrocoagulation of the ovaries in women with polycystic ovary disease (PCOD). DESIGN: Prospective case series. SETTING: Hospital-based infertility clinic. PATIENTS: Seventy-four consecutive infertile women with PCOD resistant to conventional ovulation-induction regimens. INTERVENTIONS: Laparoscopic bipolar low-watt electrocoagulation of the ovarian surface (25 W for 5-12 sec/cyst). MEASUREMENTS AND MAIN RESULTS: Postoperative follow-up ranged from 18 months to 7 years. Menstrual rhythm returned to normal in all 74 women. All 40 women in whom infertility was solely due to anovulation eventually conceived. Overall, 62 (84%) of the 74 women conceived, 42 spontaneously after surgery and 20 after supplementation with clomiphene. These 62 women had a total of 93 pregnancies: 79 singleton live births, 4 sets of twins, and 10 miscarriages. Twenty-five women conceived twice and three conceived three times. At second-look laparoscopy or cesarean section in 20 women, fine stringlike adhesions on the ovaries were found in 2. CONCLUSION: Laparoscopic low-watt bipolar electrocoagulation of the ovaries is an effective treatment for women with PCOD who fail medical therapy.

Adult↗

PubMed1987

Efficacy of monopolar electrocoagulation in the treatment of bleeding gastric ulcer: a controlled trial.

With the aim of evaluating, in a controlled prospective fashion, the efficacy of monopolar electrocoagulation in the emergency treatment of bleeding gastric and stomal ulcers, 37 patients were studied: 16 were electrocoagulated (EC group) while the remaining 21 were treated by conventional methods (control group). The hemorrhage recurred in only one of the 16 patients belonging to the EC group, but in 11 of the 21 control patients (p less than 0.0005). Transfusion requirements were also reduced in the EC group (p less than 0.05), with no significant difference in relation to mortality. Stratifying the results according to hemorrhagic activity, electrocoagulation should be clearly effective in those patients with spurting hemorrhage, taking into account several limitations: deep ulcers bearing gross vessels, and lack of cooperation by the patient. Prophylactic treatment of the bleeding ulcer with a visible non-spurting vessel may be indicated whenever we make a proper selection of the patients with a greater possibility of hemorrhagic recurrence.

Adult↗

PubMed1980

Endoscopic electrocoagulation--an alternative to operative hemostasis in active gastroduodenal bleeding?

Endoscopic electrocoagulation was considered in 69 patients with active gastroduodenal bleeding including 60 patients with peptid ulcer. Permanent hemostasis was achieved in 56 patients (81%), including 16 patients with clinical indication for surgical intervention. Electrocoagulation failed or could not be applied in 13 patients, requiring operative hemostasis in 11 patients. Though no replacing emergency, endoscopic electrocoagulation can be successful, especially if it is applied in quiescent phase of massive, life-threatening hemorrhage, and should be considered before a possible emergency operation, especially in patients with no previous ulcer disease, in the presence of some other severe illness, or in patients of advanced age.

Adolescent↗

PubMed1999

Comparison of a new automatically controlled electrocoagulator (Valleylab NS 2000-INSTANT RESPONSE technology) with a high-frequency coagulator.

Bipolar electrocoagulation is one of the most important procedures in modern neurosurgery. However, there are still many practical problems, especially tissue adherence to the tips of the coagulating forceps and the difficulty removing carbonized clots from the tips. Both make the process less accurate and more time-consuming. To prevent formation of coagulum, recently, irrigation with a saline solution and coating of the forceps tips with a special metal have been tried. In this work, we compare a new bipolar electrocoagulator with automatic output control in relation to tissue impedance (Auto Suture - Valleylab NS 2000 with INSTANT RESPONSE technology) with a high-frequency coagulator (Erbotom ICC 350, Erbe). The femoral arteries and nerves of Wistar rats, weighing on average 360 g, were prepared and coagulation was carried out with variable power settings during a constant time (3 seconds). Sections were stained with haematoxylin-eosin, van Gieson and Luxol-Fast-Blue for histological examination. Coagulation with Erbotom ICC 350 resulted in tissue sticking to the tips of the forceps in all cases, regardless of the power chosen. With the new electrocoagulator, tissue adherence to the forceps tips was not seen. With the new system, effective coagulation was also achieved at comparably lower power settings.

Animals↗

PubMed2002

Effect of multipolar electrocoagulation on EUS findings in Barrett's esophagus.

BACKGROUND: Restoration of squamous epithelium in patients with Barrett's epithelium may be achieved by treatment with a proton pump inhibitor plus selective electrocoagulation of the metaplastic epithelium. The effect of such treatment on esophageal wall thickness and morphology, as determined by EUS, is unknown. METHODS: Patients with Barrett's esophagus were treated with omeprazole (40 mg by mouth, twice daily) and underwent selective multipolar electrocoagulation of the metaplastic segment monthly until complete squamous re-epithelialization or a maximum of 6 treatments was achieved. EUS was performed before and 6 months after the end of treatment. Four-quadrant large-forceps biopsy specimens were taken every 2 cm at the 6-month follow-up. RESULTS: Twenty-five patients with Barrett's epithelium (mean length 3.1 cm, range 2-6 cm) were included. Complete endoscopic reversal was achieved in 24 patients. Residual intestinal metaplasia beneath squamous epithelium was observed in 1 patient. In 4 patients there was intestinalized mucosa at the neosquamocolunmar junction. The thickness of the treated distal esophageal wall decreased from 4.0 +/- 0.1 mm to 3.7 +/- 0.1 mm (mean +/- SEM; p < 0.05, 2-tailed paired t test). Untreated (control) esophageal wall thickness at the level of the aortic arch (2.1 +/- 0.1 mm vs. 2.2 +/- 0.1 mm) and the mid-body gastric wall thickness (2.9 +/- 0.1 mm vs. 3.1 +/- 0.1 mm) did not change. Among the 6 patients with residual intestinal metaplasia there was no change in mean wall thickness (3.7 +/- 0.2 mm vs. 3.8 +/- 0.2 mm); among the 19 without metaplasia, thickness decreased from 4.1 +/- 0.2 mm to 3.6 +/- 0.2 mm; p < 0.01. Of 11 patients with a decrease in wall thickness, only 1 had residual intestinal metaplasia. No changes in the 5-layer sonographic pattern of the esophageal wall were observed. CONCLUSIONS: Multipolar electrocoagulation of Barrett's esophagus results in a slight decrease in thickness of the treated esophageal wall. A decrease in wall thickness by EUS was associated with the absence of intestinal metaplasia in follow-up biopsy specimens.

Barrett Esophagus↗

PubMed2002

Endoscopic band ligation for control of nonvariceal upper GI hemorrhage: comparison with bipolar electrocoagulation.

BACKGROUND: Despite advances in endoscopic treatment methods for upper GI hemorrhage, hemostasis is often difficult to achieve. This study evaluated the usefulness of endoscopic band ligation for upper GI hemorrhage exclusive of hemorrhage from chronic gastroduodenal ulcer and varices. METHODS: This prospective study included 27 patients who underwent endoscopic band ligation and 31 patients in whom bipolar electrocoagulation was performed for upper GI hemorrhage. In both groups, the causes of hemorrhage included Dieulafoy's ulcer, Mallory-Weiss tear, gastric ulcer after polypectomy, and gastric angiodysplasia. Patients with esophageal varices and those with chronic gastroduodenal ulcer were excluded. RESULTS: Hemostasis was achieved in all 27 patients in the endoscopic band ligation group and in 26 of 31 patients (83.9%) in the bipolar electrocoagulation group. The median procedure time required for achieving hemostasis was 17.0 minutes (interquartile range: 11.5-23.5) in the endoscopic band ligation group versus 27.0 minutes (interquartile range: 20.5-40.0) in the electrocoagulation group. No major complications occurred in either group. CONCLUSION: Endoscopic band ligation is efficient, simple, and safe. Therefore, this technique should be considered as a treatment option for nonvariceal, nonchronic gastroduodenal ulcer upper GI hemorrhage.

Adult↗

PubMed1998

Endoscopic palliation of inoperable cancer of the oesophagus or cardia by argon electrocoagulation.

BACKGROUND: Cancer of the oesophagus and the cardia tends to present late. Palliation of dysphagia is the prospect of most of the patients. This paper reports the use of argon electrocoagulation in 83 patients with inoperable cancer strictures in the oesophagus and cardia. METHODS: The argon electrocoagulation was done by a fibre conducting electricity and argon air to the site of coagulation. After treatment the patients were allowed to take fluids and normal food the same evening or the next morning. After recanalization the patients were treated regularly every 3-4 weeks. RESULTS: Recanalization enabling passage for normal food was achieved with 1 treatment in 48 patients (58%), whereas 22 (26%) needed more than 1 treatment. In 13 patients (16%) the ability to eat normal food was not achieved. In these patients dysphagia improved at least one grade. Perforation was seen in seven patients (8%) and in 1% of treatments. Perforations were successfully treated conservatively in six of the seven patients. Sixty-three patients (76%) died during the investigation period, on average 146 days (range, 43-397 days) after diagnosis. CONCLUSION: Argon electrocoagulation offers an easy, cheap, and safe alternative to treatment with laser photocoagulation and expandable metal stents.

Aged↗

PubMed2000

Usefulness of diagnosis by the urethroscopy under anesthesia and effect of transurethral electrocoagulation in symptomatic female urethral diverticula.

OBJECTIVE: We report accurate diagnosis and simple treatment of female urethral diverticula. PATIENTS AND METHODS: When routine urologic evaluation suggested a urethral diverticulum, urethroscopy was performed with the patient under anesthesia with palpation by an intravaginal finger and transurethral catheterization to seek the orifice of the lesion. When a diverticulum was detected, transurethral electrocoagulation was performed regardless of the lesion size. RESULTS: Urethral diverticula were detected in 18 of 30 women examined (60%), with the maximum size being that of the tip of the little finger (about 10 mm in diameter). Transurethral electrocoagulation was performed. The postoperative course was uneventful in all patients, who were discharged from the hospital a day after surgery. CONCLUSIONS: Careful urethroscopy under anesthesia is a useful diagnostic tool, and transurethral electrocoagulation may be one of the best first choices of treatment for female urethral diverticula.

Anesthesia↗

PubMedDate not supplied

Transcatheter electrocoagulation: a therapeutic angiographic technique for vessel occlusion.

Previous work has shown that localized electrocoagulation of blood vessels using direct current applied by catheter placed electrodes is feasible. In vitro and in vivo experiments showed that clot size and thrombosis of vessels are directly related to the product of the amount and duration of the current. Surgically created splenic hemorrhage was well controlled in 9 of 10 animals. The vessels remained permanently occluded after electrocoagulation in 8 of 9 animals. Pathological studies of all the vessels showed intimal damage at the sites of occlusion. These experiments indicate that clot formation may be a product of both intimal damage and platelet attraction to the positive electrode. The technique has advantages over embolization since no foreign material is injected and a localized clot is produced at the tip of the guidewire. There are certain disadvantages and further refinements must be developed to establish transcatheter electrocoagulation as a useful clinical technique for vessel occlusion.

Animals↗