Occlusion arteriography: Diagnostic and therapeutic applicability of balloon catheters

1980 ◽  
Vol 3 (2) ◽  
pp. 81-96 ◽  
Author(s):  
Jürgen Weber ◽  
Dragutin Novak
Keyword(s):  
Balloon Catheters

First clinical experience with the Multi-LOC multiple stent delivery system for focal stenting in long femoro-popliteal lesions

VASA ◽  
2017 ◽  
Vol 46 (6) ◽  
pp. 452-461 ◽  
Author(s):  
Klaus Amendt ◽  
Ulrich Beschorner ◽  
Matthias Waliszewski ◽  
Martin Sigl ◽  
Ralf Langhoff ◽  
...  
Keyword(s):  
Observational Study ◽  
Clinical Experience ◽  
Delivery System ◽  
Target Lesion ◽  
Lesion Length ◽  
Elastic Recoil ◽  
Delivery Device ◽  
Clinical Assessments ◽  
Balloon Catheters ◽  
Considerable Length

Abstract. Background: The purpose of this observational study is to report the six-month clinical outcomes with a new multiple stent delivery system in patients with femoro-popliteal lesions. Patients and methods: The LOCOMOTIVE study is an observational multicentre study with a primary endpoint target lesion revascularization (TLR) rate at six months. Femoro-popliteal lesions were prepared with uncoated and/or paclitaxel-coated peripheral balloon catheters. When flow limiting dissections, elastic recoil or recoil due to calcification required stenting, up to six short stents per delivery device, each 13 mm in length, were implanted. Sonographic follow-ups and clinical assessments were scheduled at six months. Results: For this first analysis, a total of 75 patients 72.9 ± 9.2 years of age were enrolled. The majority of the 176 individually treated lesions were in the superficial femoral artery (76.2 %, 134/176) whereas the rate of TASC C/D amounted to 51.1 % (90/176). The total lesion length was 14.5 ± 9.0 cm with reference vessel diameters of 5.6 ± 0.7 mm. Overall 47 ± 18 % of lesion lengths could be saved from stenting. At six months, the patency was 90.7 % (68/75) and all-cause TLR rates were 5.3 % (4/75) in the overall cohort. Conclusions: The first clinical experience at six months suggests that the MSDS strategy was safe and effective to treat femoro-popliteal lesions of considerable length (14.5 ± 9.0 cm). Almost half of the lesion length could be saved from stenting while patency was high and TLR rates were acceptably low.

scholarly journals Internal Coating of Ureteral Stents with Chemical Vapor Deposition of Parylene

Coatings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 739
Author(s):  
Sara Felicitas Bröskamp ◽  
Gerhard Franz ◽  
Dieter Jocham
Keyword(s):  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Silver Ions ◽  
Daily Basis ◽  
Second Step ◽  
Silver Layer ◽  
Main Concern ◽  
Ureteral Stents ◽  
Balloon Catheters

Ureteral balloon catheters and ureteral stents are implanted in large quantities on a daily basis. They are the suspected cause for about a quarter of all the nosocomial infections, which lead to approx. 20,000 deaths in Germany alone. To fight these infections, catheters should be made antibacterial. A technique for an antibacterial coating of catheters exhibiting an aspect ratio of up to 200 consists of a thin silver layer, which is deposited out of an aqueous solution, which is followed by a second step: chemical vapor deposition (CVD) of an organic polymeric film, which moderates the release rate of silver ions. The main concern of the second step is the longitudinal evenness of the film. For tubes with one opening as balloon catheters, this issue can be solved by applying a descendent temperature gradient from the opening to the end of the catheter. An alternative procedure can be applied to commercially available ureteral stents, which exhibit small drainage openings in their middle. The same CVD as before leads to a longitudinal homogeneity of about ±10%—at very low costs. This deposition can be modeled using viscous flow.

Balloon Catheters in Angiography

1972 ◽  
Vol 12 (6) ◽  
pp. 721-736 ◽  
Author(s):  
R. Jensen ◽  
T. Olin
Keyword(s):  
Balloon Catheters

Effectiveness of decremental diameter balloon catheters (tapered balloon)

1992 ◽  
Vol 69 (3) ◽  
pp. 188-193 ◽  
Author(s):  
Vidya S. Banka ◽  
Howard A. Baker ◽  
Dwarka N. Vemuri ◽  
Gerardo Voci ◽  
Alan R. Maniet
Keyword(s):  
Balloon Catheters

A Biodegradable Stent Based on Poly(L-Lactide) and Poly(4-Hydroxybutyrate) for Peripheral Vascular Application: Preliminary Experience in the Pig

2007 ◽  
Vol 14 (5) ◽  
pp. 725-733 ◽  
Author(s):  
Carsten Michael Bünger ◽  
Niels Grabow ◽  
Katrin Sternberg ◽  
Martin Goosmann ◽  
Klaus-Peter Schmitz ◽  
...  
Keyword(s):  
Vascular Injury ◽  
Mechanical Stability ◽  
Vascular Trauma ◽  
Metal Stents ◽  
Peripheral Vascular ◽  
Abdominal Incision ◽  
Biodegradable Stent ◽  
Balloon Catheters ◽  
Future Work

Purpose: To assess the technical feasibility and biocompatibility of a novel stent based on poly(L-lactide) (PLLA) and poly(4-hydroxybutyrate) (P4HB) for peripheral vascular applications. Methods: A polytetrafluoroethylene aortobi-iliac graft was implanted in 5 pigs through a midline abdominal incision. After transverse graft limb incision, 5 PLLA/P4HB stents and 5 metal stents (316L stainless steel) were randomly deployed at both iliac anastomotic sites with 6-mm balloon catheters. Angiography was performed to determine patency prior to sacrifice at 6 weeks. Stented segments were surgically explanted and processed for quantitative histomorphometry. Vascular injury and inflammation scores were assigned to the stented iliac segments. Results: No animals were lost during follow-up. All PLLA/P4HB stents were deployed within 2 minutes by balloon inflation to 8 bars without rupture of the stent struts or anastomotic suture. All stents were patent on postprocedural angiography. Histological analysis showed no signs of excessive recoiling or collapse. PLLA/P4HB stents demonstrated decreased residual lumen area and increased neointimal area after 6 weeks (12.27±0.62 and 8.40±1.03 mm2, respectively) compared to 316L stents (13.54±0.84 and 6.90±1.11 mm2, respectively) as the result of differences in stent areas (PLLA/P4HB: 4.31±0.15 mm2; 316L: 2.73±0.29 mm2). Vascular injury scores showed only mild vascular trauma for all stents (PLLA/P4HB: 0.41±0.59; 316L: 0.32±0.47). Inflammatory reaction was slightly higher around PLLA/P4HB stent struts (1.39±0.52) compared to 316L (1.09±0.50). Conclusion: Rapid balloon expansion of PLLA/P4HB stents is feasible without risk of strut rupture. PLLA/P4HB stents provide adequate mechanical stability after iliac anastomotic stenting in pigs. Smaller residual luminal areas in the PLLA/P4HB stents might have been caused by tissue ingrowth into the larger strut interspaces due to higher strut thickness (stent area) in this group. This limitation needs to be addressed in future work on the stent design.

Sign in / Sign up

Export Citation Format

Share Document