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At least 865 records · Page 48Linked to original sources

PubMed1989

[Interventional electrophysiology: transcatheter electrical shock ablation for arrhythmias].

Patients with supraventricular or ventricular tachyarrhythmias resistant to antiarrhythmic drugs are candidates for surgical ablation of the bundle of His, and of accessory pathways or ventricular or atrial foci responsible for the arrhythmia. During the past 6 years closed-chest catheter techniques have been devised that allow electrical shock ablation of the atrioventricular junction, accessory pathways, or foci responsible for arrhythmias. The promising results of these ablative procedures (especially of the atrioventricular junction and posteroseptal accessory pathways) justify their trial in suitable patients before cardiac electrosurgery.

Arrhythmias, Cardiac↗

PubMed1977

Preprosthetic surgery.

Several of the abnormal conditions existing in the edentulous patient can be corrected surgically, prior to construction of dentures, to enable the patient to function more successfully following prosthetic restoration. The more common problems have been discussed which often require surgical correction. In some instances, articulated diagnostic models of the patient's mouth show that surgery can be avoided, or when surgery is necessary, these models help identify the exact locations of the tissue to be corrected. Alveolectomy has been presented with an eye toward conservatism since this procedure affects the quality of denture foundation and therefore denture stability. Alveolectomy should be performed only when there is a definite indication for the procedure. Correction of soft tissue abnormalities can substantially improve the patient's ability to function with dentures and solve many of the adjustment problems which confront the dentist. It is often better to correct the soft tissue abnormality rather than to circumvent the problem with an inferior prosthetic restoration. Since the introduction of resilient acrylics and tissue conditioning materials, the patient need no longer suffer the discomfort of denture withdrawal after surgery. Electrosurgery has emerged as a successful method of correcting many soft tissue abnormalities. Vestibuloplasty is receiving much emphasis as a possible treatment for atrophic ridges in which there is still enough alveolar bone from which to extend a sulcus. These sulcus extension procedures may offer some help in the future regarding the problem of resorbed ridges, but presently, more research is necessary before widespread use is recommended.

Alveoloplasty↗

PubMed1988

[Postoperative interferon hydrogel treatment. A method for the successful therapy of chronic persistent giant condylomas in an immunologically deficient patient with Hodgkin's disease].

The local application of recombinant interferon alpha 2c hydrogel (1.10(6) I.U. recombinant interferon alpha 2c/g hydrogel) given as an adjuvant therapy after electrosurgery led to a complete cure, without relapse, of previously recalcitrant giant condylomata acuminata similar in appearance to Buschke-Löwenstein's tumors in a 19-year-old female patient suffering from Hodgkin's disease (stage II/III). Recombinant interferon alpha 2c hydrogel given as an adjuvant therapy to surgery may have more antiviral and antiproliferative effects than immunomodulating activities. This combined topical application form of interferon alpha is a safe and effective treatment, which is recommended especially in immunocompromised individuals suffering from genital HPV infection unresponsive to systemic interferon treatment or conventional therapy modalities.

Adult↗

PubMed1988

Periodontal and prosthodontic treatment for patients with advanced periodontal disease.

This article describes prosthetic management of advanced periodontally involved dentitions. Overall prognosis and means of assessing scores to prospective abutment teeth are presented. Esthetic treatment and prognosis of surgically elongated dentitions is discussed, and a method to determine what the patient will look like after completion of treatment is presented. A specific approach using ceramometal restorations with modified long bevel and minimum gold collar and the use of electrosurgery for subgingival access is covered.

Dental Cavity Preparation↗

PubMed1988

[The CO2 laser in dermatotherapy--use and indications].

Due to the high absorption of infrared light in water the CO2 laser (lambda = 10,600 nm) is suitable for cutting and vaporizing tissue. The ablation of pathological tissue by means of the CO2 laser can be exactly controlled. The treated area is usually dry and clear since blood and lymph vessels up to a diameter of 1 mm are sealed. Postoperative swelling and pain are reduced compared with electrosurgery. Important and frequent indications for CO2 laser application are HPV papillomas (condylomata acuminata, common warts, bowenoid papules) and the removal of tattoos. The CO2 laser is also suitable for the removal of benign and disseminated lesions such as angiofibromas, syringomas, trichoepitheliomas, epidermal nevi etc. Lesions of the oral mucosa (leukoplakias, mucosal warts) can be removed by means of the CO2 laser. Additionally, the treatment of vascular lesions (nevi flammei, lymphangiomas, telangiectasias) has been described, although the CO2 laser does not operate in a vessel-specific manner. As this review article demonstrates, the CO2 laser has a broad range of applications and represents an enrichment of dermatotherapy.

Humans↗

PubMed1987

Endobronchial surgery of trachea and bronchi.

Bronchoscopic operative interventions were performed in 57 patients. We used photocoagulation with neodym-YAG-Laser, electrosurgery with fibroscopic diathermic snare and mechanical removal of endobronchial neoplasms. The most effective method was the laser photocoagulation, which permits removal of benign tumors, carcinoids, massive cicatrical tracheal stenosis and noninvasive bronchial cancer, help in restoring the lumen of main airways in case of nonoperable malignant tumors.

Adolescent↗

PubMed1982

[Modern treatment of warts (author's transl)].

A short historical review of the treatment of wart virus is given including suggestive and also x-ray-therapy. Current treatment can be divided into two main types: the conservative passive treatment (salicylic acid, 5-Fluoro-uracil etc.) and the active destructive treatment (liquid nitrogen - s. Table 2 -, electrosurgery etc.).

Antineoplastic Agents↗

PubMed1978

Treatment of cutaneous Kaposi's sarcoma with intralesional vincristine.

A 68-year-old man had lesions of Kaposi's sarcoma that developed continually in a localized area after excisional surgery, electrosurgery, and radiotherapy of previous lesions. His lesions cleared with intralesional injections of vincristine sulfate without any systemic and only minor local side effects. Newly developed lesions, which did not occur on the sites of previous treatment, were also responsive to this form of therapy.

Aged↗

PubMedDate not supplied

Histologic effects of different technologies for dissection in endoscopic surgery: Nd:YAG laser, high frequency and water-jet.

Precise cutting combined with reliable coagulation of the margins of the lesion is an important requirement for dissection techniques in endoscopic surgery. These requirements are met by the two most common ancillary energy sources applied for endoscopic dissection today, electrosurgery and "thermal lasers", mostly the Nd:YAG. For the comparison of the histological effects of monopolar and bipolar high frequency with the Nd:YAG laser an experimental in vitro and in vivo study has been performed. In order to evaluate the advantages of non thermal dissection for endoscopic procedures, a water jet cutting system was included in the in vitro study. In parenchymatous tissue the water jet was found to be the least traumatic technique, followed by bipolar high frequency, laser and monopolar high frequency. The water jet was not applicable for intestinal dissection since uncontrolled bloating of the rectal wall with uncontrolled disruption of the tissue layers occurred. A general disadvantage is that secure haemostasis in the line of incision is hard to achieve. In the microscopic comparison of the shape of the incision, the Nd:YAG laser produced the smoothest lesions with well-defined margins. The monopolar technique was more often associated with irregular and sometimes fissured margins. These results were confirmed in the in vivo part of the study (Transanal Endoscopic Microsurgery).

Animals↗

PubMed1994

Treatment of deeply infiltrating endometriosis.

Deep endometriosis has been defined as endometriosis infiltrating deeper than 5 mm under the peritoneum. A model for the development and propagation of endometriosis is presented. Subtle and non-pigmented lesions are suggested to occur intermittently in all women. Infiltration occurs generally to a few millimeters of depth only, and these lesions become typical, burnt out lesions. In some 20% of women, severe endometriosis develops either as deeply infiltrating disease or as cystic ovarian disease. Arguments are given to consider deep endometriosis and cystic ovarian endometriosis as two specific entities of endometriotic disease. A possible causal relationship with dioxin pollution is discussed. Diagnosis of deep endometriosis is made by clinical examination and palpation during surgery. Clinical examination during menstruation and CA-125 concentrations in plasma are useful to help in the diagnosis of smaller deep lesions. Surgical excision can be carried out by laparoscopy, laparotomy or vaginally using sharp dissection, electrosurgery or with the use of a CO2 laser. Excision is the treatment of choice because of a high pregnancy rate, a complete cure of pain in most women, and a low recurrence rate. Medical treatment is probably less effective to treat infertility, but highly effective in relieving pelvic pain. Medical therapy, by luteinizing hormone-releasing hormone agonists, danazol, or gestrinone, also seems useful as a pretreatment for surgery. The choice of treatment will therefore depend on the local expertise with minimal invasive surgery, certainly if a first excision has been incomplete and pain symptoms recur.

Endometriosis↗

PubMed1975

The carbon-dioxide laser. A new surgical tool.

The CO2 laser can be used as a tissue vaporizing tool and as a 'light knife'. After two years of experimental work, the authors summarize the present status of the CO2 laser and consider its possible clinical applications in surgery. The extent of the thermal damage after liver resection in dogs suggest that the CO2 laser alone is not suitable for major resections of the human liver. For tumor destruction in the aerodigestive tract, the CO2 laser has advantages over electrosurgery. It may also prove to be a substitute for electrocautery in the treatment of rectal tumors and polyps. The use of this laser should also be considered in performing biopsies on bone tumors and the excision of highly vascular soft tissues.

Animals↗

PubMed1994

[Thermal preparation techniques in gynecologic endoscopy--technical, experimental and clinical results (n=2000)].

A comparative study on thermal, mainly laser and high frequency electrosurgical techniques, was conducted. Indications, handling and morphometric results were correlated. Morphometrical findings suggest that minimal thermal tissue damage is associated by a decrease in the hemostatic effect. Additional bipolar coagulation is necessary when using the carbon dioxide laser or high frequency electrodes. As thermal tissue lesion is concerned, the two techniques differ only slightly, by fractions of millimeters. Concerning clinical handling and practicability at our department, as well as in the centers participating at the European Consensus Study on Lasers in Gynaecology, high frequency electrosurgery has proven the method of choice for endoscopic ablative procedures. The carbon dioxide laser (at laparoscopy) and the Nd:YAG contact laser (at hysteroscopy) are preferentially employed for reconstructive surgery (e.g. the carbon dioxide laser for treatment of distal tubal pathology or endometriosis, the Nd:YAG contact laser for hysteroscopic synechiolysis).

Animals↗

PubMed1993

Morphological image processing techniques in thermographic imaging.

Mathematical morphology is a set algebra that defines some important new techniques in image processing. Morphological filters are closely related to order statistic and other nonlinear filters, but they are uniquely sensitive to shape. A morphological filter will preserve shapes similar to its structuring element shape while modifying dissimilar shapes. Most morphological filters are effective at removing both linear and nonlinear noise processes. However, the standard morphological operators introduce a statistical and deterministic bias to images. Fortunately, these operators exist in complementary pairs that are equally and oppositely biased. One way to alleviate the bias is to average the two complementary operators. The filters formed by such averages are the midrange filter (basic operators), the pseudomedian filter (singly compound operators) and the LOCO filter (doubly compound operators). In thermographic imaging, one often wishes to find exact temperatures or accurate isothermal contours. Therefore, techniques used to remove sensor noise and scanning artifact should not introduce bias. The LOCO filter that we have devised provides the shape control and noise suppression of morphological techniques without biasing the image. We will demonstrate the effects of different structuring element shapes on thermographic images of tissue heated by laser irradiation and electrosurgery.

Animals↗

PubMed1993

Hysteroscopic treatment of ectopic intrauterine bone. A case report.

Hysteroscopic removal of ectopic bone in the uterus, using laparoscopic control and ultrasonographic confirmation, was used to treat a patient who presented with a diagnosis of osseous metaplasia of the uterus. Pathologic analysis revealed benign bony tissue consistent with a diagnosis of osseous metaplasia. Laparoscopy and hysteroscopy confirmed the presence of bone in the form of spicules perpendicular to the uterine endometrium. Most of the bone was present in the posterior portion of the fundus. Initial removal was performed with biopsy forceps followed by gentle curettage. The resectoscope was then introduced to visualize any remaining spicules and remove them by mechanical means with minimal use of electrosurgery. Transvaginal ultrasound assisted in identifying bone and confirming its removal during and after surgery. The hysteroscopic procedure was viewed laparoscopically to reduce the risk of uterine perforation. Dense right adnexal adhesions were also lysed. The patient received conjugated equine estrogens for five weeks post-operatively. Ultrasound showed an intrauterine pregnancy of 5 to 6 weeks plus two small calcifications approximately 1 mm each. The patient delivered a healthy infant and has had no recurrent problems. This case report demonstrates the successful use of multiple diagnostic and treatment modalities in the treatment of ectopic intrauterine bone.

Adult↗

PubMed1993

Nonsurgical management of primary skin malignancies.

Cryosurgery, electrosurgery, radiotherapy, chemotherapy, and interferon therapy achieve high cure rates for primary skin malignancies. These techniques are readily mastered. They combine cost-effective use of time, space, and equipment. Proper patient selection maximizes safety, comesis, and cure rates.

Facial Neoplasms↗

PubMed1995

[A case of advanced vulvar cancer treated with combination therapy].

Presented is a patient with advanced vulvar cancer involving the vagina, the perineum and the anus, with metastases to inguinal lymph nodes. The patient received irradiation and next, an artificial sigmoidal anus was made, with simultaneous vulvectomy performed with an electrosurgery. The patient's survival of 3 years and 3 months encourages to consider in such cases an attempt at applying aggressive surgical treatment combined with external radiotherapy.

Carcinoma↗

PubMed1996

Gas explosion during colonic surgery.

Explosions of the colon as a result of the use of diathermy in the presence of gas mixtures of oxygen, hydrogen and/or methane have been previously described in the literature. This danger is present during colonoscopic polypectomy as well as during colonic surgery. The following case is presented to alert to the potential hazards of bowel gas during electrosurgery.

Adult↗

PubMedDate not supplied

Possibilities and limits of operative hysteroscopy: an update on transcervical resectoscopic uterine surgery.

In infertility therapy operative hysteroscopy by means of high-frequency surgery has replaced laparotomy in many cases. Thus today the therapy of intrauterine synechias, septa and myoma is a major sector in hysteroscopic metroplasty. Uterine haemorrhage is another area of indications for transcervical high-frequency surgery. In menstrual disorders caused by polyps, submucous myoma or without any anatomic reason transcervical electrosurgery helps to avoid more and more hysterectomies. The increasing importance of this method becomes obvious in the 1991-AAGL-Survey according to which within three years the number of operative hysteroscopies has risen to 17,298, thus doubled within this period of time. The present article based on literature and personal experience gives an overview of technical equipment available, complications, operative technics and risks. Furthermore, the frequency of success and complications of transcervical resectoscopic surgery are also discussed.

Endoscopes↗