scholarly journals Compensation for unconstrained catheter shaft motion in cardiac catheters

Author(s):  
Alperen Degirmenci ◽  
Paul M. Loschak ◽  
Cory M. Tschabrunn ◽  
Elad Anter ◽  
Robert D. Howe
Keyword(s):  
2003 ◽  
Vol 24 (12) ◽  
pp. 955-960 ◽  
Author(s):  
Rosemary E. Duffy ◽  
Braulio Couto ◽  
Jussara M. Pessoa ◽  
Carlos Starling ◽  
Silma Pinheiro ◽  
...  

AbstractObjective:To report the results of our preintervention investigation and subsequent 19-month three-phase intervention study designed to reduce pyrogenic reactions among patients undergoing cardiac catheterization using reprocessed catheters.Design:A case-control study for the preintervention period and a prospective cohort study for the intervention period.Setting:A 400-bed hospital in Belo Horizonte, Brazil.Participants:Any patient undergoing cardiac catheterization in the hospital.Interventions:Three intervention phases were implemented to improve the quality of the water supplied to the cardiac catheter reprocessing laboratory. Standard operating procedures for reprocessing cardiac catheters were established and reprocessing staff were trained and educated.Results:The rate of pyrogenic reactions decreased significantly during the intervention phases, from 12.8% (159 of 1,239) in phase 1 to 5.3% (38 of 712) in phase 2 to 0.5% (4 of 769) in phase 3 (chi-square test for linear trend, 97.5;P< .001).Conclusion:Improving water quality and using standard operating procedures for reprocessing catheters can prevent pyrogenic reactions in hospitalized patients.


2008 ◽  
Vol 29 (9) ◽  
pp. 854-858 ◽  
Author(s):  
Jorge M. Buchdid Amarante ◽  
Cristiana M. Toscano ◽  
Michele L. Pearson ◽  
Virginia Roth ◽  
William R. Jarvis ◽  
...  

Background.Several medical devices used during hemodynamic procedures, particularly angiographic diagnostic and therapeutic cardiac catheters, are manufactured for single use only. However, reprocessing and reuse of these devices has been reported, to determine the frequency of reuse and reprocessing of single-use medical devices used during hemodynamic procedures in Brazil and to evaluate how reprocessing is performed.Design.National survey, conducted from December 1999 to July 2001.Methods.Most of the institutions affiliated with the Brazilian Society of Hemodynamic and Interventional Cardiology were surveyed by use of a questionnaire sent in the mail.Results.The questionnaire response rate was 50% (119 of 240 institutions). Of the 119 institutions that responded, 116 (97%) reported reuse of single-use devices used during hemodynamic procedures, and only 26 (22%) reported use of a standardized reprocessing protocol. Cleaning, flushing, rinsing, drying, sterilizing and packaging methods varied greatly and were mostly inadequate. Criteria for discarding reused devices varied widely. Of the 119 institutions that responded, 80 (67%) reported having a surveillance system for adverse events associated with the reuse of medical devices, although most of these institutions did not routinely review the data, and only 38 (32%) described a training program for the personnel who reprocessed single-use devices.Conclusions.The reuse of single-use devices used during hemodynamic procedures was very frequent in hospitals in Brazil. Basic guidance on how to reuse and reprocess single-use medical devices is urgently needed, because, despite the lack of studies to support reusing and reprocessing single-use medical devices, such devices are necessary in limited-resource areas in which these practices are current.


Radiology ◽  
1966 ◽  
Vol 86 (1) ◽  
pp. 123-131 ◽  
Author(s):  
L. Jerome Krovetz ◽  
Bruce T. Fairchild ◽  
Schuyler Hardin ◽  
Barry Mitchell
Keyword(s):  

2014 ◽  
Vol 155 (39) ◽  
pp. 1544-1548
Author(s):  
Liza Pelyhe ◽  
Eszter Bognár

Introduction: The cardiac catheter is an intravascular catheter, which is introduced or implanted into the heart for diagnostic or therapeutic reasons. The catheters may break or king during their introduction and/or removal. Aim: The aim of the authors was to study the pliability of two catheters with the same material but different diameters according to the Food and Drug Administration’s recommendation. Method: The bending points, diameter decrease, deflection, and their correlation and dependence on the distance from the tip, as well as the influence of the initial diameter of the catheters were determined. The bending of catheters was performed on 9 bending points (120–280 mm from the tip by 20 mm) on 16 gauges with different radius (10–2.5 mm by 0.5 mm). Results: A linear dependency between the diameter decrease and deflection was observed, which was independent from the placement of the measurement in both catheters examined. The larger initial diameter had significant (p = 0.05) greater diameter decrease than the smaller, but the curves characteristic of the diameter decrease and deflection were similar. Conclusions: The applied method seems to be useful for the examination of weak points of cardiac catheters. Orv. Hetil., 2014, 155(39), 1544–1548.


1990 ◽  
Vol 66 (10) ◽  
pp. 878-880 ◽  
Author(s):  
Thomas R. Lloyd ◽  
Richard L. Donnerstein ◽  
Farshad Shirazi

2010 ◽  
Vol 37 (12) ◽  
pp. 6377-6389 ◽  
Author(s):  
Michael A. Speidel ◽  
Michael T. Tomkowiak ◽  
Amish N. Raval ◽  
Michael S. Van Lysel

2020 ◽  
Vol 39 (5) ◽  
pp. 586-597 ◽  
Author(s):  
Paul M Loschak ◽  
Alperen Degirmenci ◽  
Cory M Tschabrunn ◽  
Elad Anter ◽  
Robert D Howe

A robotic system for automatically navigating ultrasound (US) imaging catheters can provide real-time intra-cardiac imaging for diagnosis and treatment while reducing the need for clinicians to perform manual catheter steering. Clinical deployment of such a system requires accurate navigation despite the presence of disturbances including cyclical physiological motions (e.g., respiration). In this work, we report results from in vivo trials of automatic target tracking using our system, which is the first to navigate cardiac catheters with respiratory motion compensation. The effects of respiratory disturbances on the US catheter are modeled and then applied to four-degree-of-freedom steering kinematics with predictive filtering. This enables the system to accurately steer the US catheter and aim the US imager at a target despite respiratory motion disturbance. In vivo animal respiratory motion compensation results demonstrate automatic US catheter steering to image a target ablation catheter with 1.05 mm and 1.33° mean absolute error. Robotic US catheter steering with motion compensation can improve cardiac catheterization techniques while reducing clinician effort and X-ray exposure.


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