Threshold Estimation and Superthreshold Behavior of Ultrasound-Induced Lung Hemorrhage in Rats: Role of Age Dependency
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چکیده
منابع مشابه
Threshold estimation and superthreshold behavior of ultrasound-induced lung hemorrhage in rats: role of age dependency.
Age-dependent threshold and superthreshold behaviors of ultrasound-induced lung hemorrhage were investigated with one hundred ten 12.6 +/- 0.8-d-old rats, one hundred ten 22.9 +/- 0.8-d-old rats, and one hundred 57.7 +/- 3.9-d-old rats. Exposure conditions were: 2.8 MHz, 10-s exposure duration, 1-kHz pulse repetition frequency and 1.3-mus pulse duration. The in situ (at the pleural surface) pea...
متن کاملThreshold estimates and superthreshold behavior of ultrasound-induced lung hemorrhage in adult rats: role of pulse duration.
The study objective was to estimate the pressure threshold (ED(05), effective dose, or in situ peak rarefactional pressure associated with 5% probability of lesions) of ultrasound (US)-induced lung hemorrhage as a function of pulse duration (PD) in adult rats. A total of 220 10- to 11-week-old 250-g female Sprague-Dawley rats (Harlan) were randomly divided into 20 ultrasonic exposure groups (10...
متن کاملSuperthreshold behavior of ultrasound-induced lung hemorrhage in adult rats: role of pulse repetition frequency and exposure duration revisited.
OBJECTIVE The purpose of this study was to augment and reevaluate the ultrasound-induced lung hemorrhage findings of a previous 5 x 3 factorial design study (Ultrasound Med Biol 2001; 27:267-277) that evaluated the role of pulse repetition frequency (PRF: 25, 50, 100, 250, and 500 Hz) and exposure duration (ED; 5, 10, and 20 s) on ultrasound-induced lung hemorrhage at an in situ (at the pleural...
متن کاملSuperthreshold behavior of ultrasound-induced lung hemorrhage in adult rats: role of pulse repetition frequency and pulse duration.
OBJECTIVE The purpose of this study was to enhance the findings of an earlier ultrasound-induced lung hemorrhage study (Ultrasound Med Biol 2003; 29:1625-1634) that estimated pressure thresholds as a function of pulse duration (PD: 1.3, 4.4, 8.2, and 11.6 micros; 2.8 MHz; 10-s exposure duration [ED]; 1-kHz pulse repetition frequency [PRF]). In this study, the roles of PRF and PD were evaluated ...
متن کاملThreshold Estimates of Ultrasound-induced Lung Hemorrhage in Adult Rats: Role of Pulse Duration
The pressure threshold of ultrasound-induced lung hemorrhage has been estimated as a function of pulse duration (PD) in adult rats. A total of 220 10to 11week-old 250-gram female Sprague-Dawley rats (Harlan) were randomly divided into 20 ultrasonically exposed groups (10 rats/group) and one sham group (20 rats). The 20 ultrasonically exposed groups (2.8 MHz; 10-s exposure duration; 1-kHz PRF) w...
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ژورنال
عنوان ژورنال: Ultrasound in Medicine & Biology
سال: 2009
ISSN: 0301-5629
DOI: 10.1016/j.ultrasmedbio.2008.06.006