Pressure Transducers (Pressure Transducer)

06/01/2003 - "The ability of type 3 monitors to "rule in" sleep apnea is less convincing, but this may improve with the use of improved technology, such as nasal pressure transducers. "
09/01/2005 - "The results of small studies have suggested that a nasal-cannula pressure transducer has a higher sensitivity than a thermistor in detecting hypopneas and diagnosing sleep-disordered breathing in both adults and children. "
09/01/2005 - "Polysomnographic recordings of 40 children (24 girls and 16 boys, mean age 9.2 +/- 1.7 years; range 6-11 years) were analyzed to compare the detection of sleep-disordered breathing events by 2 different methods of measuring airflow: thermistor alone and thermistor with nasal-cannula pressure transducer (transducer) used simultaneously. "
09/01/2005 - "We compared a thermistor alone, and in conjunction with a pressure transducer, for detection of sleep-disordered breathing in children during in-home polysomnography. "
12/01/2002 - "Polysomnography with nasal cannula/pressure transducer and esophageal manometry; pattern recognition of sleep disordered breathing (SDB) in children. "

06/01/1987 - "This study was designed to examine whether pressure transducer systems prepared hours or days before actual use represent an infection potential. "
01/01/2019 - "Invasive intracranial pressure (ICP) monitoring therefore remains a cornerstone of modern neurocritical care, despite the attendant risks of infection and damage to brain tissue arising from the surgical placement of a catheter or pressure transducer into the cerebrospinal fluid or brain tissue compartments. "
01/01/2009 - "Replacing pressure transducers and tubing every 4 days, and using coated devices in patients requiring a central venous catheter >5 days in settings with high infection rates only were recognized as recommended by 53% and 31%, respectively. "
05/18/2008 - "Recommendations for replacing pressure transducers and tubing every 4 days, and for using coated devices in patients requiring a CVC < 5 days in settings with high infection rates were recognized only by 48% and 66%, respectively. "
07/01/1988 - "Outbreak of infection with Achromobacter xylosoxidans from contaminated intravascular pressure transducers."

01/01/2020 - "Each patient-specific model was connected to a programmable pulsatile pump and benchtop FFR (B-FFR) was derived from pressures measured proximal and distal to coronary stenosis using pressure transducers. "
02/01/2018 - "Benchtop FFR was derived from pressures measured proximal and distal to coronary stenosis using pressure transducers. "
10/01/2001 - "New interventional techniques to diagnose coronary artery stenosis, such as calculation of myocardial fractional flow reserve (FFR) with a guidewire and pressure transducer, provide a functional assessment of coronary lesions. "
09/01/1978 - "Pressure losses across stenoses were measured by a differential pressure transducer through small catheters implanted in the distal and proximal left circumflex coronary artery or ascending aorta, a system that was linear within +/-5% to 30 Hz. Coronary stenoses were produced by saline-filled, perivascular cuff constrictors inflated to constant pressure by a pressure regulator. "
11/01/1999 - "Small pressure transducer and Doppler quartz placed at the tip of angioplasty guide wire give the opportunity to measure coronary flow physiology parameters, the physiopathologic impact of an epicardic coronary stenosis and the efficacy of its treatment. "

01/01/2018 - "Currently, the gold standard for monitoring is invasive pressure transducers, usually an intraventricular monitor, which presents significant risk of infection and hemorrhage. "
06/01/2005 - "By the completion of this experiment, students are expected to be able to: 1) describe the basics of maintenance of anesthesia in a live animal; 2) describe basic surgical technique; 3) observe the procedure for proper cannulation of blood vessels; 4) describe the proper method of controlling hemorrhage from a bleeding source; 5) describe the measurement and recording of four physiological parameters: mean arterial pressure from a pressure transducer, heart rate from an ECG, hindquarters resistance from Doppler measurement of femoral arterial blood flow, and cardiac contractility by calculating dP/dt from left ventricular pressure measured with a Millar transducer; 6) perform a premortem exam of the heart and lungs and appreciate the in situ cardiothoracic anatomy of the living animal; 7) assist in the induction of ventricular fibrillation and perform direct cardiac massage; 8) characterize the autonomic responses activated by the baroreceptor reflex; 9) describe the effects of the adrenergic agonists epinephrine, norepinephrine, and isoproterenol on cardiovascular parameters and construct a dose response curve for each agent; 10) describe the effects of the adrenergic antagonists propranolol and prazosin on cardiovascular parameters and explain how they affect cardiovascular responses to adrenergic agonists; 11) describe the difference between endothelium-dependent and endothelium-independent vasodilation using acetylcholine, nitroprusside, and atropine; 12) observe the pressor response of angiotensin II and describe why this response is not blocked by pretreatment with prazosin; and 13) participate in the collection and analysis of experimental data and the presentation of results."

01/01/2015 - "The assessment of diastolic changes in the presence of handgrip-inducible ischemia using noninvasive pressure transducers might provide after further studies a simple complementary diagnostic tool to assist in identification of patients with atypical or asymptomatic CAD. "
01/01/1999 - "This study uses open-chest pigs instrumented with high-fidelity pressure transducers to investigate the effect of regional ischemia on the active component of relaxation independent of the passive effects of filling and the effect of left ventricular filling and stretch on the rate, duration, and extent of relaxation. "
05/01/2016 - "Langendorff-perfused rat hearts were subjected to ischemia for 30 min followed by reperfusion for another 30 min. Myocardial function indices were measured by a left ventricular cannula via a pressure transducer connected to the polygraph in isolated Langendorff hearts and energy metabolism was measured using (31)P nuclear magnetic resonance (NMR) spectroscopy. "
05/01/1992 - "Left ventricular catheter-tip pressure transducers and major and minor axis ultrasonic dimension crystals were inserted, and the animals were then supported by cardiopulmonary bypass with 30 minutes of normothermic ischemia. "
01/01/1990 - "Isolated, buffer perfused rabbit hearts were subjected to 1 h of global ischemia followed by 1 h of reperfusion, and the percent recovery of developed tension (relative to preischemic) was measured via a left ventricular balloon connected through a pressure transducer to a polygraph recorder. "