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Results for “ELECTROSURGERY”

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At least 109 records · Page 6Linked to original sources

PubMed1986

Salpingo-ovariolysis: a comparison between laser surgery and electrosurgery.

A prospective, randomized study comparing the result of salpingo-ovariolysis using the carbon dioxide (CO2) laser and the microdiathermy needle was conducted. The pregnancy rate after laser surgery was 53.3% (n = 30) and after electrosurgery was 51.5% (n = 33) at 2-year follow-up. Although the surgery-conception interval after laser surgery (9.9 +/- 2.0 months) tended to be shorter than after electrosurgery (13.1 +/- 2.0 months), no statistical difference was reached. This report suggests that there is no difference between the pregnancy rate after salpingo-ovariolysis with the use of the CO2 laser or with the use of the microdiathermy needle. The surgery-conception interval, however, tends to be shorter after laser surgery. A larger series of patients is required to clarify the latter.

Adult↗

PubMed1994

An In-Vivo Evaluation of the Correlation Between Histologic and Visually Estimated Zones of Tissue Injury Created with Monopolar Electrosurgery

It has been postulated that laparoscopic electrosurgery may be a less predictable surgical method than lasers and substantial tissue injury may occur unbeknownst to the surgeon. We proposed to evaluate the correlation of histologic injury to visual estimated injury in a porcine model undergoing laparoscopic electrosurgery. A 25 kg female pig underwent laparoscopy. Using monopolar scissors, "touch cuts" were performed to create a peritoneal defect. Progressive increases in current density where achieved by increasing the pre-calibrated wattage of a Valley Lab Force 2 generator. Both pure cutting and coagulation waveforms were used. An estimate of lateral damage was obtained by using a calibrated probe. At laparotomy, these tissue samples were individually extracted en-bloc, pinned flat and placed in formalin. Multiple sections were taken from each block and stained. A pathologist who was blinded to power settings evaluated the amount of thermal destruction. Thirty evaluable peritoneal sections were multiply examined by the blinded pathologist. A significant correlation was found between the visual estimation of injury and the histologic grading of tissue damage. (Pearson's Correlation Coefficient=0.42, P<0.02). These findings suggest that visual estimation of laparoscopic tissue injury is correlated to the actual histologic tissue damage. These data may aid the laparoscopic surgeon in evaluating the efficacy of the power settings and the need for modification during the operative procedure rather than retrospectively in the pathology laboratory.

Journal Article↗

PubMed1985

Transendoscopic electrosurgery for epiglottal entrapment in the horse.

Monopolar electrosurgical cutting was used to correct epiglottal entrapment in 5 horses. The operations were carried out in the conscious animal, using topical anesthesia. The procedure required the use of a coagulation electrode designed specifically for electrosurgery, introduced through the instrument channel of a fiberoptic endoscope. The results were satisfactory and serious complications were not encountered. In 2 horses, excessive submucosal swelling developed at the site of the surgical wound, and the tumefaction took several weeks to subside in one of these horses. In both horses, the long-term outcome was a minor degree of reentrapment. The main advantages of this technique, compared with other corrective procedures, related to the avoidance of the need for general anesthesia and laryngotomy, allowing racehorses to be treated without any major interruption in their training schedules. The surgery was simple, rapid, and bloodless, and was not followed by any dorsal displacement of the soft palate. It was suggested that transendoscopic electrosurgery has potential for use in the treatment of a number of other diseases of the respiratory tract and other systems, both in the horse and in other species. In the equine respiratory tract, the technique might usefully be applied to the treatment of guttural pouch tympany, soft palate cysts, nasopharyngeal polyps, choanal atresia, subepiglottic cysts, and tracheal granulomata. A review of 21 cases of epiglottal entrapment in horses revealed no evidence to support the suggestion that dorsal displacement of the soft palate is a cause of epiglottal entrapment or vice-versa.(ABSTRACT TRUNCATED AT 250 WORDS)

Animals↗

PubMed1965

TREATMENT OF BASAL CELL CARCINOMA BY CURETTAGE AND ELECTROSURGERY.

One hundred and forty-eight basal cell carcinomas were treated by curettage and electrosurgery. Twenty-six recurrent carcinomas were treated and 24 did not recur during a minimum two-year follow-up. Seventy-two newly diagnosed carcinomas were treated by the same method, and a two-year recurrence-free rate of 97.4% was obtained. About 50 new and recurrent lesions were treated in three patients in whom extensive cutaneous changes from actinic atrophy and previous therapy made the distinction between new and recurrent lesions difficult or impossible. This technique has a particular place in the management of multiple lesions. Patient acceptance is good. Lesions at some sites, e.g. on the nose, where closure of a wound is difficult, are better managed by this method than by surgical excision. Secondary infection is rare and the cosmetic results are excellent.

Administration, Cutaneous↗

PubMed1991

A prospective study of incisional time, blood loss, pain, and healing with carbon dioxide laser, scalpel, and electrosurgery.

Carbon dioxide laser incisions are reported to be less painful, less bloody, and less prone to seroma formation and to heal better than scalpel or electrosurgical incisions. We compared all three modalities in a prospective randomized study of cholecystectomy incisions. Time required for the incision and incisional blood loss was less with electrosurgery than with the carbon dioxide laser or scalpel. Postoperative pain and wound healing, however, were the same for all three techniques. The carbon dioxide laser appears to offer no advantage over conventional means of making a standard incision.

Adult↗

PubMed2005

Comparison of experimental nerve injury caused by ultrasonically activated scalpel and electrosurgery.

BACKGROUND: Iatrogenic nerve injury caused by heat from dissection instruments is a significant problem in many areas of surgery. The aim of the present study was to compare the risk of nerve injury for three different dissection instruments: monopolar and bipolar electrosurgery (ES) and an ultrasonically activated (US) instrument. METHODS: The biceps femoris muscle was cut in a standard manner just adjacent to the sciatic nerve using monopolar ES, bipolar ES or US shears. A total of 73 functional experiments were conducted in which the nerve was isolated, divided proximally, and stimulated supramaximally in 37 anaesthetized rats. The electromyographic (EMG) potential was recorded distally before and after each experiment. Nerve dysfunction was defined as more than 10 per cent loss of the evoked EMG potential. Fifty-nine nerves were examined histologically after dissection with the different instruments. The extent of heat damage was determined in four nerves that were divided with ES bipolar scissors and five that were divided with US shears. RESULTS: Reduction in the EMG potential was significantly more frequent in the monopolar ES group than in the US group. Morphological examination also showed significantly less nerve damage in the US group. CONCLUSION: US instruments may be safer than ES for dissection close to nerves.

Animals↗

PubMed1998

The medicolegal risks of thermal injury during laparoscopic monopolar electrosurgery.

Medicolegal liability claims arising from minimally invasive surgeries are rapidly increasing. While the medical community appears aware of certain types of liability risks in this area, it often underappreciates the risks associated with monopolar laparoscopic electrosurgery. Jury verdicts and settlements help define this problem, which can lead to improved healthcare delivery and better outcomes for patients.

Burns, Electric↗

PubMed1996

Laser-mode electrosurgery.

When performing reoperative surgery or in primary cancer resections, where margins of excision are narrow and tumor spillage is a risk, dissection by electrosurgery with a ball-tip should be considered. This technique preserves the surgeon's view of the operative field by electroevaporation of irrelevant normal or tumor tissues, provides complete small vessel hemostasis, and prevents charring. Tumor spillage is minimized and margins of resection are maximized by the ball-tip dissection technique.

Electrosurgery↗

PubMed1999

Successful resection of endotracheal papillary adenocarcinoma by endoscopic electrosurgery using a new snare: report of a case.

We report herein the rare case of a patient with endotracheal papillary adenocarcinoma of the goblet cell type. The tumor existed in the upper trachea, obstructing 95% of the airway, and prompt palliation was required. Endotracheal polypectomy was successfully performed in this patient using electrosurgery with a new snare designed for the respiratory tract. The procedure took only a few minutes and the dyspnea was relieved promptly without any complications. The alternative techniques for palliation of bronchial stenosis are also discussed.

Adenocarcinoma, Papillary↗

PubMed1997

Optimization of high-frequency electrosurgery of the meniscus.

In an in vitro study of the sheep's meniscus, the possibilities to reduce the thermal tissue necrosis caused by high-frequency electrosurgery of the meniscus were studied. Under standardized conditions, machine-made sections through the meniscus were cut using electrodes of various thicknesses and different settings of the electric generator. The thermal tissue necrosis near the cut through the meniscus was determined using light microscopy and image analysis on the specimen stained according to Masson-Goldner. With a constant voltage of 250 V tissue necrosis was significantly less for electrodes of a diameter of 0.5 mm than for 1.5-mm electrodes (187.3 microns as compared with 368.0 microns). For electrosections carried out using a commercially available electrode with a low voltage of 250 V as well as with a power-controlled generator, tissue necrosis was also significantly less than with a constant high voltage of 395 V (181.4 microns and 210.2 microns as compared with 325.0 microns). Thus, an effective reduction of thermal tissue necrosis in arthroscopic partial meniscectomy is possible when thin electrodes and power-controlled generators are used.

Animals↗

PubMed1992

Electrosurgery in arthroscopy.

Electrosurgery using high-frequency (HF) technique in arthroscopic operations has been used routinely in our hospital for 8 years. Main indications are meniscal resections, lateral release, plica cutting, and arthrolysis. The main instrument is a hook, which is insulated up to the tip and also cuts meniscal tissue. The cutting effect depends on the strength of the electrical current, the configuration of the hook-knife, and the cutting speed. The advantages of the electric knife over mechanical instruments are the ability to cut in all directions without resistance and easy manipulation within narrow joint spaces. Also, the necrotic depth of the meniscal cartilage is not excessive. Follow-up studies in 940 cases greater than 1 year after arthroscopic meniscal surgery did not show any significant difference in the results with or without use of the electric knife.

Arthroscopy↗

PubMed1990

Comparison of electrosurgery with conventional fiberotomies on rotational relapse and gingival tissue in the dog.

The relapse tendency of orthodontically rotated teeth after electrosurgical circumferential fiberotomies and after conventional scalpel blade surgical procedures was demonstrated with a split-mouth procedure involving the maxillary second incisors of five mongrel dogs. The second incisors were rotated orthodontically an average of 63.5 degrees over a 4-month period. Electrosurgical circumferential fiberotomies were performed on the designated second incisors, and circumferential fiberotomies with a scalpel blade were performed on the contralateral incisors. The teeth were retained for 1 month and relapse was measured 2 months postretention. Wound healing was demonstrated by measurement of sulcus depths and facial gingival recession preoperatively and at 1, 2, 3, 4, and 9 weeks after surgery. In both groups, the sulcus depths had decreased about 2 mm and the facial gingiva had receded 0.3 mm 9 weeks after surgery. Two months postretention there was an average 25% relapse in the teeth treated by means of a circumferential fiberotomy with a scalpel blade compared to an average 23% relapse in those treated by means of a circumferential fiberotomy with electrosurgery. No significant difference was seen between the two techniques.

Animals↗

PubMed1998

Minimizing patient risk during laparoscopic electrosurgery.

By the year 2000, many surgical procedures will be performed laparoscopically. When used appropriately, this technique is less disruptive to tissues than open surgery. It results in faster patient recovery time with less pain, fewer wound complications, and less scarring. As this technology is increasing, it is important to develop and implement perioperative safety precautions to reduce the risks associated with laparoscopic electrosurgery. Using the safety precautions outlined in this article may substantially reduce iatrogenic complications that can occur with these surgeries and result in better patient outcomes.

Burns↗

PubMed1984

Percutaneous intrarenal electrosurgery.

A 16F nephroscope with a 5F cutting element was used for percutaneous removal of kidney stones in 10 patients in whom an open operation otherwise would have been necessary. Stone removal was accomplished via percutaneous incision of narrowed infundibula, caliceal diverticula and the ureteropelvic junction. A thorough knowledge of renal vasculature, meticulous care and fluoroscopic control are necessary for successful percutaneous intrarenal electrosurgery.

Adult↗

PubMed1976

Electrosurgery burns and the urologist.

Investigations into the problems associated with electrosurgery machines have concentrated on protecting the patient from radio frequency burns. While protection of the patient is essential an equally serious and dangerous situation exists in protecting the surgeon, particularly the urologist during transurethral resection of the prostate. The 2 subtle causes of burns to the surgeon are reviewed--capacitive coupling and grounding paths that include the surgeon. Protection of the surgeon as well as the patient depends upon an awareness of the peculiar mating of high frequency current and the grounded environment of the operating room.

Burns, Electric↗

PubMed1997

Electrosurgery and cardiac devices.

The increased number of patients with implantable cardiac devices presents a unique challenge to physicians performing office-based electrosurgical procedures. Electrosurgery can be performed safely if the electrosurgical techniques and potential risks from these devices are understood. We present an overview of the most common types of implantable cardiac devices, potential complications associated with them, and recommendations for preoperative evaluation, intraoperative monitoring, and postoperative follow-up.

Defibrillators, Implantable↗

PubMed1987

Use of 1.5% glycine as a nonconductive fluid medium for arthroscopic electrosurgery.

Sixty-five surgical cases were studied to determine whether 1.5% glycine, used as an irrigation solution during electrosurgery to the knee, had any histological effect on the synovial cells or the articular cartilage. Histologic specimens of the articular cartilage were stained with Safranin-O to assess proteoglycans-enhanced chrondrocyte function, and the synovium was stained with pentachrome. The results indicated that there were no adverse effects, either short term or long term, when viewing both the synovium and the articular cartilage histopathologically after glycine irrigation subsequent to the electrothermal procedure.

Adolescent↗

PubMed1995

The tissue and thermal effects of electrosurgery in the uterine cavity.

A brief outline of the physics associated with the production of electrosurgical wave-forms has been described. The conversion of electrical to thermal energy in electrosurgical techniques has demonstrable tissue and thermal actions and these were discussed in greater detail. In vitro electroresection was associated with a narrow ZTN underlying the electrode that did not vary with power output, but was related to duration of exposure. For blend 2 cutting output the mean ZTN ranged from 0.97 to 1.40 mm for a single sweep of the electrode. With longer time increments this ZTN increased to 2.20 mm. Coagulation by desiccation, in vitro, resulted in a depth of destruction of 3.24-3.49 mm that did not vary with power output or duration of exposure. Fulguration only achieved a depth of destruction of up to 1.78 mm that was related to time. This confined-ZTN in the fulguration mode was felt to be too narrow to destroy the deeply seated myometrial gland elements. Thermal transmission through blocks of human uterine tissue, in vitro, has been demonstrated. Resection generated a maximum rise of 5.8 degrees C at 12 mm from the electrode, with desiccation, a maximum of 4.0 degrees C. It was also demonstrated that resection and desiccation have differing thermal profiles, the latter being more confined in nature. Both power output and duration of exposure in resection are important factors, in vitro, with regard to heat generation. Duration of exposure during desiccation is important in terms of heat generation, but not power output. Repetitive electrosurgical insults have a cumulative effect on the thermal profile in vitro. The underlying damage to uterine tissue during electrosurgery in vivo has been established. In electroresection the zone of thermal necrosis was related to duration of exposure, whereas in electrodesiccation the damage appeared confined, self-limiting, and not time-related. The lack of clinically significant demonstrable thermal transmission through the uterus was important. However, excessively prolonged application of electrosurgical energy (greater than 5 seconds) in the narrow regions of the uterus, especially with electroresection, could still be potentially dangerous. The use of the desiccation mode in the cornual regions is recommended for three reasons; the loop electrode has greater potential for perforation in this thin region (because of its diameter); the desiccating mode appeared to have a clearly defined, consistent ZTN that did not alter appreciably; and the thermal imaging of the ball electrode, in vitro, demonstrated the more confined nature of its thermal profile compared to the loop electrode.(ABSTRACT TRUNCATED AT 400 WORDS)

Electrosurgery↗