منابع مشابه
Use of Catheter-tip. Velocity-Pressure Transducer
A catheter-tip velocity transducer with two high-fidelity pressure manometers was used to evaluate the left ventricular (LV) hemodynamic effects of intravenous propranolol (10 mg). Nine patients without clinical evidence of heart failure were studied. Pulsatile ascending aortic blood flow velocity and pressure and LV pressure were measured continuously during drug administration. Beat-to-beat c...
متن کاملQuantitation of aortic insufficiency using a catheter-tip velocity transducer.
Bidirectional instantaneous aortic root blood flow was measured in 18 patients with aortic insufficiency (AI) using a catheter-tip velocity transducer. The magnitude of AI was quantitated by determining total forward systolic flow from the area of the flow velocity curve above the zero baseline and regurgitant diastolic flow from the curve area below the baseline. Effective forward flow (stroke...
متن کاملUse of catheter-tip velocity--pressure transducer to evaluate left ventricular function in man: effects of intravenous propranolol.
A catheter-tip velocity transducer with two high-fidelity pressure manometers was used to evaluate the left ventricular (LV) hemodynamic effects of intravenous propranolol (10 mg). Nine patients without clinical evidence of heart failure were studied. Pulsatile ascending aortic blood flow velocity and pressure and LV pressure were measured continuously during drug administration. Beat-to-beat c...
متن کاملPolyimide/SU-8 catheter-tip MEMS gauge pressure sensor
This paper describes the development of a polyimide/SU-8 catheter-tip MEMS gauge pressure sensor. Finite element analysis was used to investigate critical parameters, impacting on the device design and sensing characteristics. The sensing element of the device was fabricated by polyimide-based micromachining on a flexible membrane, using embedded thin-film metallic wires as piezoresistive eleme...
متن کاملAbstract: In catheter minimally invasive neuro surgery (CMINS), catheter tip collision with the blood vessel detection
In catheter minimally invasive neuro surgery (CMINS), catheter tip collision with the blood vessel detection during the surgery practice is important. Moreover, successful CMINS is depended on the discrimination of collision by skilled surgeon in direct operation. However, in the context of teleoperated scenario, the surgeon was physically separated. Therefore, lacking of haptic sensation is a ...
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ژورنال
عنوان ژورنال: JAPANES JOURNAL OF MEDICAL INSTRUMENTATION
سال: 1983
ISSN: 0385-440X,1881-4875
DOI: 10.4286/ikakikaigaku.53.12_600