Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “Angioscopes”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 451 records · Page 25Linked to original sources
PubMed2006

[Initial experience in endoscopic radial artery harvesting].

We report the initial experience of endoscopic radial artery (RA) harvesting (ERA) using Vasoview System. The expected advantages of ERA are superior cosmetic results and fewer wound complications to the conventional open technique. ERA was performed in 33 patients from September 2004 to September 2005. Preoperatively, Allen's test with Doppler imaging was performed in all patients. ERA was successfully performed within 50 minutes except in the first 3 patients (the mean time for harvest: 37 minutes). Direct injury of the RA occurred in 1 patient, but the RA could be used as a graft for coronary artery bypass grafting (CABG) by repairing with end-to-end anastomosis. Only 1 RA graft occluded as determined by the early postoperative angiography. Local dissection of the RA was observed in 2 patients, but no flow disturbance was observed. Delayed wound healing occurred in 1 aged patient. No significant nerve complications were encountered. ERA is easy to adopt and has greater cosmetic advantages.

Aged↗
PubMed1995

[Angioscopy as intraoperative outcome control after reconstructive surgery of the renal arteries: presentation of a new method].

Main reasons for obstruction of renal arteries are atherosclerosis and fibromuscular dysplasia. In our clinic transaortic renal endarterectomy and interposition of a vein segment are preferred for arterial reconstruction. The surveillance of the distal intimal ridge after blind transaortic endarterectomy is still an unsolved problem, and the distal anastomosis of a vein graft must be checked, as it is performed under difficult conditions, if the suture is done in situ. We introduce angioscopy as a means of intraoperative surveillance.

Anastomosis, Surgical↗
PubMed1995

[Endoscopic dissection of perforating veins].

Endoscopic subfascial sectioning (ESDP) is an effective method for the interruption of incompetent perforating veins. From March 1993 to April 1994 27 patients underwent ESDP in 35 legs. ESDP was performed in combination with Babcock's operation in 31 cases. Most patients demonstrated chronic venous insufficiency stage II or III (n = 25). A venous ulcer was found in 9 patients. Intraoperative complications were not seen. Postoperative complications were delayed wound healing (n = 1) and subfascial hematoma (n = 1). At follow-up examination after a mean interval of 8 months persistent insufficient perforating veins were seen in 3 of 88 Cockett veins (4%). A local dysesthesia of the saphenous nerve was found in 6 legs. Prior active venous ulcers had healed in 8 of 9 cases.

Adult↗
PubMed1995

Coronary angioscopy.

Coronary angioscopy will not replace angiography as the gold standard for imaging atherosclerotic coronary arteries. However, there may well be a clinical niche for a technology that gives accurate information regarding a specific lesion, if that information can be used to improve the acute or chronic outcome of an interventional procedure. Our experience demonstrates that angioscopy indeed provides this information. Using angioscopy, we now have access to information regarding arterial wall disease that heretofore has been available only at necropsy. In addition, whereas angiography has provided only a 2-dimensional, gray-scale image of the coronary vessels, angioscopy offers a full-color, 3-dimensional perspective of the intracoronary surface morphology. These important lesion-specific details, not reliably available from angiography alone, may ultimately be used to improve patient outcome and to assess risk.

Angioplasty, Balloon, Coronary↗
PubMed1993

New expandable access sheath for endovascular visualization and repair.

Catheter-based endovascular techniques are becoming increasingly important. Access to the vascular lumen is the single most critical common step to all these interventions. This report describes the concept of, and initial clinical experience with, a new expandable access sheath for endovascular therapy.

Angioplasty, Balloon↗
PubMedDate not supplied

[Endoscopic treatment of perforating veins--current data].

Blind dissection of incompetent perforators is common practice for vein surgeons. Since many years some of them have been trying to do this endoscopically by means of the proctoscope or other endoscopes used for different purposes. At present however several surgeons are developing special instruments for this type of endoscopy. Lately some of these surgeons came together to work up their experiences and to study the probable future of the method. It permits the diagnosis and at the same time the treatment of incompetent perforators. It allows the healthy ones to be spared. All this can be done from a small incision distant to the site of the perforators where the skin often presents with trophic changes. However general or regional anesthesia as well as the bloodless limb technique are prerequisites. As any endoscopy also this one has its specific dangers and complications and therefore has to be learned and performed carefully.

Angioscopes↗
PubMed1993

[Percutaneous coronary angioscopy].

In the last few years, major advances in catheter technology and miniaturization of fiber optics have allowed percutaneous coronary angioscopy to become a reality. Current angioscopy systems provide an outstanding image quality yielding precise evaluation of coronary atherosclerosis morphology in its various clinical manifestations. However, coronary angioscopy is a new diagnostic tool whose indications and specific role are yet to be delineated. Investigation on the potential roles of this technology are mainly centered in the field of acute coronary syndromes and interventional coronary therapies. In the near future, coronary angioscopy may play an important role in the investigation of the natural history of coronary artery disease, in the field of thrombolysis, and in the selection of specific therapy. In this article, coronary angioscopy system and technique are described and its potential clinical applications discussed.

Angina, Unstable↗
PubMed1993

[Carbon dioxide as an irrigation medium for percutaneous angioscopy].

Since technical progress has allowed the development of small and flexible endoscopes, percutaneous, transluminal angioscopy promises to be a diagnostic and therapeutic tool. Nevertheless, the main problem is to obtain a satisfactory bloodless visual field. The saline solutions used for this purpose present problems with hypervolaemia, insufficient clearance, and decreased refraction. We investigated a CO2 application system for angioscopy that allows the reproducible injection of variable quantities of gas, pressure, and injection time. In 10 pigs undergoing angioscopy, CO2 was injected through a Swan-Ganz catheter under blockade of the distal aorta. Using a bifemoral approach, the application of gas and the blocking balloon were controlled by an automatic gas injector. The CO2 was injected through the tip of the catheter with a constant flow and a variable pressure and time. The angioscopy procedures were videotaped. With small volumes of carbon dioxide (approximately 50 cm3; 1000 mbar application pressure) a column of gas can be created which, unlike liquids, completely displaces blood from the vessels and allows for several minutes a bloodless inspection of the aorta and the side branches without blood mixture. Carbon dioxide application allows safe and successful percutaneous angioscopy under optimal conditions if the quantities of gas, pressure, and injection time are adjustable. The tested gas injection device fulfills these conditions.

Angioscopes↗
PubMed1993

[Endoscopic perforant vein revision. Current status].

Blind dissection of incompetent perforators is common practice for vein surgeons. Since many years some of them have been trying to do this endoscopically by means of the proctoscope or other endoscopes used for different purposes. At present, however, several surgeons are developing special instruments for this type of endoscopy. Lately some of these surgeons came together to work up their experiences and to study the probable future of the method. It permits the diagnosis and at the same time the treatment of incompetent perforators. It allows the healthy ones to be spared. All this can be done from a small incision distant to the site of the perforators where the skin often presents with trophic changes. However, general or regional anesthesia as well as the bloodless limb technique are prerequisites. As any endoscopy also this one has its specific dangers and complications and therefore has to be learned and performed carefully.

Angioscopes↗
PubMed1993

[Ablation of venous valves with Nd-Yag laser--an alternative to conventional valvulotomy?].

The careful removal of venous valves during in situ venous bypass procedures is a problem that has not been completely solved. In this experimental study, valve ablation with the Nd-Yag laser was compared with conventional valvulotomy. The investigation was performed in vitro using human vein segments with a length of 20 cm. Conventional valvulotomy was performed 16 times, 20 valves were removed with a 400 mu-fibre and 26 with the hot tip. The results were evaluated by endoscopy, light and electron microscopy. There were no vein perforations with the valvulotome and the hot tip. Endothelial damage was documented in 85% with the valvulotome and was reduced significantly to 58% with the 400 mu-fibre. With the hot tip endothelial lesions were seen in only 30%. Valve remnants were always present with the valvulotome and in no more than 15% with the hot tip. Electron microscopy supported these results in general. There was no endothelial damage in 69%.

Angioscopes↗
PubMed1998

[Video endoscopy in neurosurgery].

The authors present an analysis of their experiences with performing more than 330 video endoscopic operations on the autopsy material and in 172 patients. In 54 of these patients operations were performed for traumatic intracranial convex hematomas, in 21 for adenomas of the hypophysis, in 14--for arterial aneurysms, and 53 patients with discogenic radiculitis, spinal tumors, consequences of severe spinal traumas. In 25 patients the endoscopic videomonitoring was made during excision of the tumors, paratumorous cysts and abscesses of the brain, decompression of the optic nerve, plasty of the anterior cranial fossa fundus with closing the liquor fistulas. Intraoperative angioscopy in carotid endarterectomy was fulfilled in 5 patients. The video endoscopy was proved to result in less traumaticity of the radical surgery. It is a valuable and highly informative method giving optimum results in performing many microsurgical operations.

Adult↗