Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Pacing and clinical electrophysiology 21 (1998), S. 0 
    ISSN: 1540-8159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Thrombosis of the subclavian vein can occur after the implantation of transvenous pacemaker electrodes. Although this is seldom followed by thromboembolic complications, it can cause problems when replacing the leads. To assess the impact of the pacemaker leads on the subclavian vein, a study using nonin-vasive duplex sonography was performed on 56 patients at an average of 41 months after the implantation. Forty-three percent of the patients were found to have a normal function of the subclavian vein, 46% developed pathological changes of the vessel wall, and 11% occluded. These changes rarelv caused symptoms, and, therefore, had little clinical significance. Moreover, the occlusion rate was found independent of the patient's age, the patient's sex, the number of electrodes, the procedure of implantation, and even the time from implantation. As a result, the clinical diagnosis of occlusion is uncertain. Therefore, duplex sonography is recommended as an easy means of excluding a totally thrombosed subclavian vein prior to replacing pacemaker leads.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    World journal of surgery 12 (1988), S. 724-731 
    ISSN: 1432-2323
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Des progrès récents ont augmenté les possibilités de diagnostic et les moyens d'investigation vasculaire non invasifs. Ceux-ci comprennent la mesure de la pression partielle en oxygène à travers la peau, la débitométrie par laser Doppler, et la microscopie intravitale avec et sans utilisaton de colorants fluorescents, analysant l'hémodynamique de la peau et la morphologie microvasculaire, la vitesse sanguine capillaire, et l'échange transcapillaire de solutés. De plus, la duplex-sonographie offre la possibilité de détecter des sténoses dans les artères auparavant inaccessibles comme les artères mésentériques et rénales. Cette méthode, associant l'échographie mode B et l'échographie par Doppler pulsé convient également à dessiner la cartographie et à quantifier les lésions occlusives de l'aorte jusqu'aux vaisseaux à mi-mollet avec une précision comparable à celle de l'artériographie. Les implications cliniques de ces nouvelles méthodes sont discutées dans cette revue.
    Abstract: Resumen Recientes avances tecnológicos han incrementado la capacidad diagnóstica del laboratorio vascular. Los nuevos avances incluyen la medici'on de la presión parcial transcutánea de oxígeno, la flujometría con el Doppler de laser (que utiliza luz laser en vez de ultrasonido) y la microscopía intravital con y sin el uso de colorantes fluorescentes, para el análisis de la hemodinamia de la piel y de la morfología microvascular, de la velocidad del flujo capilar, y del intercambio transcapilar de solutos. Además, la escanografía duplex abre una nueva posibilidad para detectar áreas de estenosis en arterias hasta ahora inaccesibles, tales como troncos mesentéricos y renales; la combinación de la ultrasonografía de modo B y con los datos del Doppler hace posible delinear y cuantificar lesiones oclusivas desde la aorta hasta las arterias proximales de la pantorrilla con una certeza similar a la de la arteriografía. En esta revisión se discuten las diferentes implicaciones clínicas de estas novedosas técnicas.
    Notes: Abstract Recent advances in technology have further increased the diagnostic potential of the noninvasive vascular laboratory. They include measurement of transcutaneous oxygen pressure, laser Doppler flowmetry and intravital microscopy with and without the use of fluorescent dyes for analyzing hemodynamics of the skin and microvascular morphology, capillary flow velocity, and transcapillary exchange of solutes. Moreover, duplex scanning opens a way to detect stenoses in previously inaccessible arteries such as the mesenteric and renal trunks. The combination of B-mode and pulsed Doppler ultrasound is also suited to map and quantify occlusive lesions from the aorta down to the proximal calf arteries with an accuracy similar to arteriography. The clinical implication of these new techniques is discussed in this review article.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 1432-086X
    Keywords: Key words: Thrombectomy—Catheter—Thrombosis—Femoropopliteal artery
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Purpose: To describe a new catheter for the percutaneous mechanical removal of fresh and organized thrombi, and to assess its efficacy and safety in vitro and in vivo. Methods: The catheter consists of a coated stainless steel spiral that rotates at 40,000 rpm over a guidewire inside the whole length of an 8 Fr, single-lumen, polyurethane catheter, driving a dual-blade cutting crown. Abraded occlusion material is sucked into the catheter head through distal side holes and transported by the spiral into a reservoir at the proximal end. The efficacy of the device was tested in arterial models and fresh bovine carotid arteries (n = 72). In a clinical pilot study 10 patients (8 women, 2 men; mean age 70.6 ± 10.1 years) with occlusions of the superficial femoral artery (2–12 cm, mean 5.8 cm), not older than 4 weeks, underwent thrombectomy with the new catheter. Results: In arterial models and bovine cadaver arteries the catheter completely removed fresh thrombi. Occlusion material of higher consistency was cut into particles of 100–500 μm and transported outside. Thrombectomy was successful and vessel patency restored in all 10 patients. The ankle/brachial pressure index significantly (p 〈 0.0005) increased from 0.41 ± 0.18 before intervention to 0.88 ± 0.15 after 48 hr and to 0.84 ± 0.20 after 3 months. Two reocclusions occurred within 14 days after the intervention. Conclusion: Thrombectomy with the new device appears to be feasible and safe in patients with acute and subacute occlusions of the femoropopliteal artery.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 1432-2013
    Keywords: Videomicroscopy ; Microcirculation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract An intravital fluorescence videomicroscopy technique is described in an attempt to develop noninvasive methods for the study of transcapillary exchange in human physiology and clinical medicine. The apparatus used consists of a Ploemopak incident light fluorescence microscope and a low light level television camera with linear output. After intravenous bolus injection of Na-fluorescein in 12 healthy subjects the movement of the dye particles in the nailfold was observed and stored on video-tape. Immediately after arrival the dye leaks into a halolike section and later into the more remote parts of the pericapillary space. By moving a densitometric window on an axis transversal to the capillary loop (single frames of the tape), characteristic patterns of fluorescent light intensity distribution were obtained at different time intervals. At the edge to the halo the high pericapillary light intensity decreases abruptly moving further away from the capillary (mean: 10.0 μm) for 20 min and more in each individual indicating the presence of a diffusion barrier at this location between halo and more remote areas. Clearance of the dye is much slower than transcapillary diffusion and lasts approximately 2 h.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...