Tissue Perfusion
Signal
Laser Doppler flowmetry (LDF) offers a continuous measurement of blood cell perfusion in the microcirculatory beds of skin tissue and other tissues without influencing the blood perfusion. LDF is measured in a relative unit of BPU (Blood Perfusion...
Video
Signal
Video is widely used in life sciences, such as to record movement or changes in colour, shape and size, because it offers greater depth and interactive insight, especially when it is synchronized with quantitative data recordings.
Angles
Signal
Measuring the way different parts of the body are moving relative to each other is extremely useful for movement, kinematics and gait studies. Measuring joint angle is one common way of assessing this movement.
NIBP
Signal
NIBP, or non-invasive blood pressure, can be recorded from both animals and humans. The methods used to measure NIBP in human and animal subjects differ.
pH
Signal
pH is a unit used to quantify the acidity or basicity of a solution. It is a logarithmic scale related to the molar concentration of hydrogen atoms. pH values can be between 0 and 14 where 0 is the strongest acid, 7 is neutral and 14 the most basic.
Dissolved Gases
Signal
Dissolved gas measurements can be used in many gas exchange studies including measuring amount of dissolved nitrogen in blood, amount of dissolved oxygen and carbon dioxide in seawater or other aqueous physiological solutions.
Sound
Signal
Vibration in air or another medium can be detected by sensory organs as sound. This can also be easily detected and interpreted by electronic instrumentation for utilization in life science research applications.
Heart Rate
Signal
Heart Rate is typically a calculated measurement, derived from various direct measurements of heart activity, such as ECG, Blood Pressure, or non-invasive pulse measurements. Heart rate indicates the frequency, typically measured in beats per minute...
dP/dT
Signal
dP/dt is a signal derived from pressure, typically ventricular blood pressure, that indicates the change in pressure over time.
Respiratory Exchange Ratio (RER) is the ratio between the volume of CO 2 being produced by the body and the amount of O 2 being consumed. This value of this ratio gives us an indication as to whether the body is operating aerobically or anaerobically...
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SpO2
Signal
Oxygen saturation is a relative measure of the quantity of dissolved or carried oxygen in the blood. It is usually measured as percentage of hemoglobin binding sites occupied by oxygen in the bloodstream. Arterial oxygen saturation measured at the...
Ventricular Pressure Volume + PV Loops
Research Application
Changes in ventricular function for both normal and diseased conditions can be studied through analysis of ventricular pressure volume loops. The gold standard method for measuring direct, real-time complete cardiac function, particularly myocardial...
ECG
Signal
ECG / EKG Signal Electrocardiography (ECG or EKG) is the study of the heart's electrical activity, most commonly recorded via placement of electrodes on the skin. Human and animal ECG signals can be recorded for easy processing of heart rate, heart...
Electrical Stimulation
Signal
Electrical stimulation has long been used in research to either observe propagation or activation properties, mapping and threshold studies in both human and animal subjects. By varying the amplitude, duration and frequency of stimulation, it has...
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Galvanic Skin Response (GSR)
Signal
Galvanic Skin Response (GSR) measures changes in sweat gland activity on the skin as an indication of physiological or psychological arousal. Galvanic Skin Response may also be referred to as electrodermal response (EDR), skin conductance response...
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Human Invasive Blood Pressure Monitoring
Research Application
Under pressure to deliver results? We have everything you need for human invasive blood pressure monitoring - measure blood pressure intravenously in humans, from atria to arteriole. Use our human-approved invasive blood pressure equipment -...
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存储GLP数据时，应使用哪种媒介？
Support Article
FDA 21 CFR Part 11没有规定必须用于归档数据的特定类型的媒介，因为各种可用媒介没有标准寿命。 用户有责任确保在要求的时间内正确存档所有数据。
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导管压力范围是多少?
Support Article
Millar 压力导管的工作范围为-760到4000毫米汞柱。这些压力传感器的线性工作范围是-50至300毫米汞柱。 对于任何超出线性范围的压力，用户必须在他们期望的工作压力范围内进行非线性校准。用户可以使用LabChart多点校准扩展来校准压力传感器。 客户将需要生成压力范围，以便执行非线性校准。该扩展可以从ADInstruments网站的 下载页面免费获得，并可与用于Mac OS和Windows的LabChart一起使用。
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大型动物压力体积标定时应使用多少盐水？
Support Article
建议使用每公斤体重1/4 CC的15-30％高渗盐水进行大型动物盐水校准。 理想的情况是从低于此水平的体积开始并逐步提高直至最佳反应速度。
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心电图分析模块如何确定时间点“T波结束点”?
Support Article
对于非啮齿类ECG, ECG分析模块通过首先找到T波峰值时间点(T-peak)来估计T波结束点。在峰值之后下降斜率上，从70%到30%绘制一条最小二乘拟合线。然后将T波结束点标记为拟合线与波形的等电电平的交点。它不是等电位线与心电信号本身的交点。 啮齿动物的T波结束点则是简单地利用心电图信号本身与等电力线的交点。 在LabChart的帮助菜单中，在本页底部的“Calculations”小节下面，“ECG average”页面中有一节描述了这些算法。