Transonic Supports Surgeon’s Dream for Ethiopian Children’s Heart Center and Training Facility

Transonic Systems (Ithaca, NY) is pleased to be able to help a German-trained Ethiopian surgeon realize his dream. Dr. Kifle Tondo, currently working in Braunschweig, Germany hopes to build a long-term clinic for children with heart disease in Ethiopia. He is also working to establish a training center, Hospital Germano, for cardiac surgery. To ensure quality assurance during cardiac surgical procedures, Transonic has donated equipment including a flowmeter and flowprobes to the center.

“It is wonderful to have the opportunity to assist in such a worthwhile cause”, said Miriam Tenorio, Marketing Manager at Transonic Systems. “It is always heartwarming to hear about people like Dr. Tondo and his team, who go above and beyond the call of duty, and we’re glad to be able to be a small part of such a big endeavor.”

The connection between Braunschweig City Hospital and Ethiopia stems from Dr. Tondo’s longstanding vision to help his countrymen. After receiving his MD and PhD degrees from the University of Cologne and while working in the cardiac surgery intensive care unit in 2001, Dr. Tondo organized the first transport of Ethopian children to Germany for heart valve operations in 2000, in the University hospital of Goettingen where he served for 8 years.

However, he envisioned more than helping individual children. He also began laying the groundwork for caring for such cases in Ethiopia. Cornelia Schollbach, a Braunschweig cardiac surgery intensive care nurse, was listening. She asked if it was possible to send a complete team of doctors, cardiac perfusionists, and nursing professionals as well as all of the necessary medical equipment to Addis Ababa for short periods of time in order to perform heart valve replacement operations.

Thus, the Heart for Ethiopia Project was born! Read More

Transonic Endovascular Systems Sheds Light On Problem Cases

When interventionalists at the University of Pennsylvania discover a discrepancy between their physical examination of a patient’s vascular access and the patient's angiographic picture, they turn to the Transonic's Endovascular Flowmeter and ReoCath® Flow Catheter for more information.

In the May 2013 issue of the Journal of Vascular Interventional Radiology, the interventionalists Oleg Leontiev and Scott Tretotola reported the results of a study in which 104 catheter-based flow measurements were performed from a total of 1,540 dialysis interventions over a two and one-half year period. Intra-graft blood flow was measured in 50 patients with fistulas and 34 patients with grafts. A 600 mL/min flow rate threshold generally prompted an intervention.

Preeminent Vascular Access Management Physicians Offer a Flow-based Approach to Relieve Dialysis Access-Related Steal Syndrome (DASS).

Dialysis access-related steal syndrome (DASS), caused by lack of blood flow distal to the AV access, is a growing problem as the number of autologous arteriovenous fistulas (AVFs) increases. DASS management must balance the relief of the distal ischemia with the need to preserve a viable access for dialysis.

Drs Gerald Beathard and Lawrence Spergel's 28-page review, referenced by 158 publications, offers clinicians who manage hemodialysis patients and perform vascular access procedures an invaluable summary of the symptoms, diagnostic maneuvers, and treatment options for DASS.

Published in Seminars in Dialysis, the review presents an in-depth analysis of the diagnosis of DASS, its risk factors and constellation of symptoms, along with the pathogenesis of hand ischemia followed by a comprehensive overview of its management revision methodologies including banding. Read full publication brief

Transonic Scisense Library Bolsters Customer Support

Bringing Transonic Scisense into the new rebranded Transonic family is about more than a new look and logo. It is about sharing the same purpose and values which makes Transonic “the measure of better results.” Just one aspect of that mission is providing the resources, knowledge and support which has made Transonic a world leader in flow measurement to the pressure and pressure-volume communities.

To that end, a whole new line of Transonic Scisense pressure and pressure-volume literature is being developed; including background information on the technologies, guides for understanding and using the products, and a range of surgical practices and protocols.

Take a peek at what is to come and download some of the latest PDFs here:

Pressure-Volume Theory of Operation including Conductance and Admittance methods  How to Optimize Catheter Life Span (A Guide to Catheter Best Practices)  Rat Left Ventricular Pressure-Volume Measurements using an Open Chest Approach 

The Measure of Better Results for Conscious Studies

As Transonic begins to celebrate its 30th anniversary, the following is one of a series of articles that chronicle the history of the company and its innovative technologies that have provided measures of better results.

The challenge of any scientific endeavor is to study nature without altering it. This assumes that one has the tools to make such a study. When Cornelis Drost pioneered the invention of a transit time ultrasound blood flowmeter with Dr. Alan Dobson at Cornell University School of Veterinary Medicine in 1973, the task was to develop a better flowmeter that could be used in animal studies to monitor blood flow under true physiological conditions without the affects of anesthesia while the subject was conscious and undergoing normal activity.

The established technologies of the time were electromagnetic and Doppler flowmeters. Electromagnetic flowmeters were plagued by an offset at zero flow that wandered as the experiment advanced. How was one to evaluate a change in blood flow as a physiological response to a challenge if the baseline was not stable? Further, the electromagnetic technology required that the probes maintained physical contact with the vessel and so squeezed the vessel with a slight constriction. Doppler ultrasound was less traumatic, but only measured velocity, not volume. What assumptions could be made about normal changes in vessel diameter during vasoconstriction and vasodilatation to try to calculate volume from velocity? The velocity measurement also assumed a laminar flow profile – how to measure cardiac output with its turbulent velocity profile? The solution was a transit time flowmeter that measured volume flow directly with loose fitting probes that maintained a stable reading at zero flow.