complex coronary angioplasty: Use of extended and angled balloon catheters

1987 ◽  
Vol 13 (4) ◽  
pp. 284-287 ◽  
Author(s):  
John D. Slack ◽  
Cass A. Pinkerton
Keyword(s):  
Coronary Angioplasty ◽  
Balloon Catheters

Functional properties and performance of new and reprocessed coronary angioplasty balloon catheters

2006 ◽  
Vol 78B (2) ◽  
pp. 364-372 ◽  
Author(s):  
Mariangela Fedel ◽  
Francesco Tessarolo ◽  
Paolo Ferrari ◽  
Christian Lösche ◽  
Nikou Ghassemieh ◽  
...  
Keyword(s):  
Functional Properties ◽  
Coronary Angioplasty ◽  
Balloon Catheters ◽  
Angioplasty Balloon ◽  
And Performance

scholarly journals Reuse of balloon catheters for coronary angioplasty

1995 ◽  
Vol 26 (3) ◽  
pp. 840-841 ◽  
Author(s):  
Yoseph Rozenman ◽  
Mervyn S. Gotsman
Keyword(s):  
Coronary Angioplasty ◽  
Balloon Catheters

scholarly journals Reuse of balloon catheters for coronary angioplasty: A potential cost-saving strategy?

1994 ◽  
Vol 24 (6) ◽  
pp. 1475-1481 ◽  
Author(s):  
Sylvain Plante ◽  
Bradley H. Strauss ◽  
Gilles Goulet ◽  
Randal K. Watson ◽  
Robert J. Chisholm
Keyword(s):  
Cost Saving ◽  
Coronary Angioplasty ◽  
Potential Cost Saving ◽  
Potential Cost ◽  
Balloon Catheters

scholarly journals FLEXIBILITY TEST OF THE TOOLS OF ANGIOPLASTY

2016 ◽  
Vol 3 ◽  
pp. 15-18
Author(s):  
István Hajdu ◽  
Dóra Károly ◽  
Liza Pelyhe
Keyword(s):  
Coronary Arteries ◽  
Coronary Angioplasty ◽  
Measuring Device ◽  
Testing Method ◽  
Balloon Catheters

Coronary angioplasty is a procedure used to treat the narrowed coronary arteries. Physicians operate with many different tools during the intervention, the main devices are the following: guidewires, guiding catheters, balloon catheters and stents. One of the most important properties of the tools of angioplasty is flexibility. This article introduces a flexibility measuring device and a testing method. With the help of this the flexibility of the tools of angioplasty can be compared easily.

Myocardial Protection during Coronary Angioplasty with Autoperfusion and Forced Perfusion: An in vitro comparison

1994 ◽  
Vol 17 (2) ◽  
pp. 83-87 ◽  
Author(s):  
E.D. De Muinck ◽  
B.J. Verkerke ◽  
G. Rakhorst ◽  
K.I. Lie
Keyword(s):  
Blood Flow ◽  
Coronary Angioplasty ◽  
Myocardial Protection ◽  
Coronary Perfusion ◽  
Mean Flow ◽  
Perfusion Pump ◽  
Flow Rates ◽  
Balloon Catheters ◽  
Flow Through

During coronary angioplasty, perfusion distal to the inflated angioplasty balloon can be maintained with autoperfusion balloon catheters and coronary perfusion pumps. The blood flow rates through the autoperfusion balloon catheters and the flow rates achieved with a perfusion pump were compared in vitro with fresh human blood at 37° C. In a specially designed system, blood flow rates through Stack™ autoperfusion balloon catheters were measured at 40, 60 and 80 mmHg continuous pressure. In another system, driving pressures were measured during perfusion with the pump, through a specially designed forced perfusion catheter at 20, 40 and 60 ml/min flow. The pressure applied in the autoperfusion experiments was converted into atmospheres (atm) to facilitate comparison with the driving pressures measured during pumping (1 mmHg = 1.316 × 10−3 atm). Mean flow rates through the autoperfusion balloon catheters were: 46 ml/min at 0.05 atm, 66 ml/min at 0.09 atm and 75 ml/min at 0.1 atm. Mean pressures during pumping were: 1.8 atm at 20 ml/min, 3.5 atm at 40 ml/min, 5 atm at 60 ml/min. Due to the phasic nature of coronary blood flow, the flow through autoperfusion balloons is generally lower than the minimum required for adequate myocardial protection (= 60 ml/min). Thus, autoperfusion balloon catheters are simpler and cheaper devices than perfusion pumps, but generally they are not able to provide adequate myocardial protection.

scholarly journals Temperature-dependent tensile properties of polyamide 12 for the use in percutaneous transluminal coronary angioplasty balloon catheters

2021 ◽  
Vol 20 (1) ◽  
Author(s):  
C. Amstutz ◽  
B. Weisse ◽  
S. Valet ◽  
A. Haeberlin ◽  
J. Burger ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Properties ◽  
Yield Stress ◽  
Young’S Modulus ◽  
Coronary Angioplasty ◽  
Young's Modulus ◽  
Percutaneous Transluminal Coronary Angioplasty ◽  
Balloon Catheters ◽  
Transluminal Coronary Angioplasty ◽  
Percutaneous Transluminal

Abstract Background Percutaneous transluminal coronary angioplasty (PTCA) balloon catheters must withstand high pressures required for the lesion treatment, pushing loads during insertion, and pulling loads during withdrawal. These loads pose a challenge especially for polymeric tubular shafts with small cross sections. In order to enable new design innovations and to better understand the mechanics of current catheter technologies, the tensile properties of polyamide (PA) 12 were investigated. PA 12 dog bone specimens and medical PA 12 tubes were either stored at ambient temperature and humidity or conditioned in water, and subjected to tensile loads at different temperatures. In addition, the effect on the tensile properties of the necking process, a forming process to reduce the wall thickness of the tubes, was determined. Results The tested tubes showed a reduction in both Young’s Modulus (− 41.5%) and yield stress (− 29.2%) compared to standardized specimens. Furthermore, an increase in temperature and water absorption softens the material and reduces the mechanical properties like the Young’s Modulus and the yield stress. It was found that the material strengthens during the necking process. Likely due to the orientation of the polymers chain molecules in load direction (Rösler et al., 2007), the Young’s Modulus of the material could be increased by 43.5%. Furthermore, the absence of a yield point after necking allows for a greater loading capacity of the material without unstable neck growth. Besides the strengthening, the ultimate strain is reduced by 50%. This indicates that the necking process induces plastic deformation. Conclusion The investigation showed that the environmental conditions like temperature and humidity can influence mechanical properties. It could also be shown that pre-forming processes such as necking can enhance the mechanical properties, such as the Young’s Modulus, while reducing the wall thickness. These findings suggest possible further development of catheters with a small cross section and higher mechanical strength and highlight the importance to account for the targeted operating temperature during the design process.

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