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动物无创全身体积描记系统/无创型动物肺功能检测仪
WBP清醒无约束动物气道高反应检测系 (Conscious Unrestrained Non-invasive)
?无须麻醉的无创检测方法,动物清醒并可自由活动
?操作简单方便,可同时检测数十只动物,适合于大量筛选实验;
?尤其适用于长期跟踪研究,同只动物多次重复实验
?提供呼吸速率、潮气量、呼气峰值、吸气峰值、Penh等参数;
?提供从啮齿类到非人灵长类动物的各种全身体积描记器、/span>
无创型动物肺功能检测系?全身体积描记?/span>
Whole body plethysmography is an application whereby ventilatory parameters are measured while the subject is conscious and unrestrained. By the use of bias airflow supplies CO2 levels temperature and humidity are maintained at normal levels enabling measurements to be made over several hours.
During inspiration there is a slight net pressure rise within theplethysmograph due to increased temperature and humidity of the air as it enters the subject’s lungs (gas conditioning). During normal breathing this pressure difference is directly proportional to the respiratory pattern of the subject allowing the researcher to measure respiratory rate and tidal volume in accordance with ICH S7 Guidelines.
The system is commonly used in airway hyper-reactivity studieswhere in addition to changes in ventilatory parameters valuable data can obtained
by quantifying changes in the shape of the respiratory waveform e.g. Penh. However it should be noted that when bronchoconstriction is present
the respiratory signal is dominated by the effects of gas compression and therefore exact measures of tidal volume can not be determined.
Parameters Measured
Breathing frequency
Tidal volume (during normal breathing)
Minute volume
Penh (enhanced pause)
Inspiration time
Expiration time
Peak inspiratory flow
Peak expiratory flow
Explanation and more parameters
Features
Non-invasive
Real time tidal volume measurement using multiple compensation factors (e.g. Epstein & Epstein Drorbaugh & Fenn)
Real time environmental monitoring (atmospheric pressure temperature humidity)
Subject is unrestrained and conscious
No anaesthesia
Range of species including guinea pigs rats and mice
Chronic and long term use
Measurement during aerosol challenge
Up to sixteen animals measured simultaneously
Optional body temperature measurement through telemetry
Uses
Airway hyper-reactivity models
Late phase response studies
Chronic studies
Drug screening
Toxicology
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