If You Can Sew It, We Can Measure It!

Transonics Microvascular Flowprobe Measuring Volume Flow in Rat Femoaral A Anastomosis

Download the Technical Note on How to Measure Properly with MicroFlowprobes

Microvascular Flowprobes measure volume flow in 0.5 - 4.0 mm blood vessels and grafts. These micro-Flowprobes give the microvascular surgeon a quantitative tool with which they can objectively assess the quality of their work. No longer will a surgeon have to rely solely on clinical impressions, but now can immediately identify otherwise undetectable flow restrictions in reconstructions or replantations.



HD03 Surveillance Program Results in 82% Thrombosis Rate Drop at St. Vincent’s Hospital (Sydney, Australia)

Please Click Here to Receive the Report and Abstract of the St. Vincent Experience

After morbidity and mortality meetings identified the number of patients admitted due to thrombosed AV access secondary to stenosis as an issue to be improved at St. Vincent’s Hospital, the hemodialysis team implemented a vascular access management program following KDOQI Guidelines. The results were astounding. The number of patients presenting with a blocked AV access requiring immediate surgical repair dropped by 82%. AV Access life was prolonged through early detection of deteriorating of accesses; increased referrals for angioplasty, and reduced number of thrombosed fistulas. The number of catheters was reduced as well as hospitalization & medical costs.



0% Recirculation Capability Sets Transonic HD Monitoring Apart

Graph Showing 0% Recirculation Dilution Curve

Download the Transonic Vascular Access Handbook - Click Here

Access recirculation occurs when a portion of the blood returning from the dialyzer recirculates through the arterial line rather than passing through the venous circuit. Underdialysis occurs when recirculation is present. Recirculation is now considered a late indicator of access dysfunction.

Because traditional methods such as blood urea nitrogen (BUN) sampling can not separate recirculation of dialyzed blood through the access from recirculation through the cardiopulmonary system (cardiopulmonary recirculation or CPR), recirculation was often overestimated.

However, the sensitivity of Transonic Flow/dilution technology is able to identify cardiopulmonary recirculation from access recirculation, so, with the publication of “Identifying a New Reality: Zero Vascular Access Recirculation” in 1995, 0 % access recirculation became an attainable measurement reality.



70% Isopropyl Alcohol Lubricant Replaces Vaseline for HD Flow/Dilution Sensors

 Transonic Hemodialysis Flow/Dillustion Sensor To Receive the 70% Isopropyl Alcohol Instrutions for Ues - Click Here


Transonic Hemodialysis Flow/dilution Sensors have traditionally used Vaseline to ensure good ultrasonic signal coupling between the sensor and the tubing which is necessary to achieve accurate measurements. After customers requested an antiseptic material to lubricate their tubing before placing it into the groove of the Flow/dilution Sensor, Transonic engineers tested 70% isopropyl alcohol to be used as a substitute for Vaseline with Flow/dilution Sensors. The testing results showed that 70% isopropyl alcohol works well as a tubing lubricant and doesn’t result in any significant loss of either Flow/dilution Sensor accuracy or signal strength.

Seamless [wipe-insert-close] Sequence Critical

An important caveat to using 70% isopropyl alcohol as the lubricant with Flow/dilution Sensors is to follow the Instructions for Use with careful attention to the sequence of seamlessly wiping the tubing, inserting tubing into the sensor, and closing the sensor in order to achieve successful measurements.



Revised CABG Quality Assurance Handbook is Here (Flow-based Intraoperative Coronary Artery Bypass Patency Assurance)

Download the Flow-based Intraoperative Coronary Artery Bypass Patency Assurance Handbook - Click Here

Transonic is pleased offer you the revised 2014 Flow-based Intraoeprative Coronary Artery Bypass Patency Assurance handbook. This 106-page handbook includes the reasons why flow measurement is critical, a flow measurement patency assessment protocol with 23 case reports, the physiology of graft flow and representative profiles. Interspersed throughout are frequently asked questions and publication briefs of landmark publications such as Di Giammarco’s A et al’s, “Can Transit-time Flow Measurements Improve Graft Patency and Clinical Outsome in Patients Undergoing Coronary Artery Bypass Grafting,” Nordgaard HB et al’s “Pulsatility Index Variations Using Two Different Transit-time Flowmeters in CABG Surgery,” and Herman C et al’s “Intraoperative Graft Flow Measurements during Coronary Artery Bypass Surgery Predict In-hospital Outcomes.”



Purdue University Biomedical Engineers Test Telemetry System in Swine Heart Failure Model

Download the Full Paper on Purdue Univeristy Biomemdical Engineers Test Tellemety System in Swine Heart Failure Model-Click Here

Engineers from the Department of Biomedical Engineering, Purdue University demonstrated the feasibility of using the new totally implantable Transonic EndoGear telemetry system to measure the progression of hemodynamic parameters simultaneously in various swine failure models over the course of four to six weeks. Solid-state blood pressure sensors inserted in the left ventricle and the descending aorta measured pressure. Left anterior descending (LAD) and the brachiocephalic blood flow velocities were measured with Doppler probes. Heart rate was monitored by ECG electrodes applied to the surface of the left ventricle. The results demonstrated that the Endogear system can be used for long-term, simultaneous monitoring of hemodynamic parameters which may help in the understanding of cardiovascular disease progression and treatment.