What is being recorded with finger pulse?

It is recorded using a photoelectric pulse transducer, which measures changes in blood volume (plethysmography). A light source in the transducer transilluminates the finger tip, and a photoconductor detects changes in light intensity within the finger caused by pulsatile variations in blood volume.

What is a finger pulse recording and why do we record it using the PowerLab system?

You will make simple recordings and measurements using the Finger Pulse Transducer. The purpose of the PowerLab system is to acquire, store, and analyze data. The raw input signal is in the form of an analog voltage whose amplitude varies continuously over time.

What is actually being recorded in the power lab?

The Power Lab is basically recording the pulse of the person, at a particular range (for example we used 200/s) and displaying that data.

Why is it important to have the finger pulse transducer attached properly what happens if it is too tight or too loose when on the volunteer’s finger?

It is important to have the finger pulse transducer attached properly because if it is on loose on the finger, the signal will be poor. If it is on too tight, you will lose blood circulation.

What is a finger pulse transducer together with a sphygmomanometer capable of determining?

What is a finger pulse transducer, together with a sphygmomanometer, capable of determining? Only systolic pressure. Systolic pressure is indicated by the first detection of a finger pulse, whereas diastolic pressure can only be determined using the auscultation method.

How do you use a PowerLab?

Youtube quote:In the exercise science lab to show you how to use a power lab hardware set up with lab chart software. So you collect electrocardiogram. Or ECG.

What does a finger pulse transducer do?

Overview. Finger Pulse Transducers use a piezo-electric element to convert force applied to the active surface of the transducer into an electrical analog signal. They are ideal for use in the classroom to study heart rate.

What are the components of a PowerLab?

The PowerLab System

The hardware includes the PowerLab recording unit and various ancillary devices (front- ends, pods and so on); the software consists of the LabChart and Scope application programs, and supplementary modules and extensions, which run on the computer to which the PowerLab is connected.

Can you think of some parameters that LabTutor could calculate based on your original pulse trace?

Can you think of some other parameters that LabTutor could calculate based on your original pulse trace? It could record the pressure that the pulse generated, heart rate, and blood pressure.

What is the function of the input amplifier in LabChart?

The Input Amplifier allows you to set up the recording parameters and preview the signal using your chosen settings.

What is korotkoff sound and what does it indicate?

Korotkoff sounds (KorS) are the audible noises used to measure blood pressure. Throughout the short process of taking a blood pressure measurement, the sounds change a phenomenon that has undergone extensive study.

What is pulse transducer?


When the TSD200 is attached to the skin, the infrared light is modulated by blood pulsing through the tissue below. The modulated, reflected light results in small changes in the resistance of the photo resistor, which yields a proportional change in voltage output.

What is systolic pressure indicated by?

Systolic blood pressure is the pressure exerted when the heart beats and blood is ejected into the arteries. In a blood pressure measurement written as a fraction, the systolic blood pressure is the top number. Normal systolic blood pressure is 120 mmHg or lower.

Which is more important diastolic or systolic?

Over the years, research has found that both numbers are equally important in monitoring heart health. However, most studies show a greater risk of stroke and heart disease related to higher systolic pressures compared with elevated diastolic pressures.

What’s the difference between systolic and diastolic?

Blood pressure readings are given in two numbers. The top number is the maximum pressure the heart exerts while beating (systolic pressure). The bottom number is the amount of pressure in the arteries between beats (diastolic pressure).

Is systolic contracting or relaxing?

Diastole and systole are two phases of the cardiac cycle. They occur as the heart beats, pumping blood through a system of blood vessels that carry blood to every part of the body. Systole occurs when the heart contracts to pump blood out, and diastole occurs when the heart relaxes after contraction.

Is tachycardia a heart disease?

Tachycardia is an increased heart rate for any reason. It can be a usual rise in heart rate caused by exercise or a stress response (sinus tachycardia). Sinus tachycardia is considered a symptom, not a disease. Tachycardia can also be caused by an irregular heart rhythm (arrhythmia).

Which side of the heart is systolic?

The left ventricle fills with oxygenated blood between heartbeats, then pumps the blood around the body during a heartbeat, also known as systole. If the left ventricle cannot fully relax, it cannot hold the amount of blood that the body needs.

When systolic blood pressure is recorded what is happening?

Systolic blood pressure (the first and higher number) measures pressure inside your arteries when the heart beats. Diastolic blood pressure (the second and lower number) measures the pressure inside the artery when the heart rests between beats.

Is 120 systolic normal?

Normal blood pressure for most adults is defined as a systolic pressure of less than 120 and a diastolic pressure of less than 80. Elevated blood pressure is defined as a systolic pressure between 120 and 129 with a diastolic pressure of less than 80.

Which blood pressure reading should I record?

Blood pressure is recorded as two numbers, the systolic pressure (the pressure when the heart beats) over the diastolic pressure (the pressure when the heart relaxes between beats). We record this with the systolic pressure first (on the top) and the diastolic pressure second (below).

What is Smartwatch mm Hg?

***Millimeters of mercury (mmHg) is a unit of pressure – specifically, the pressure generated by a column of mercury 1 millimeter high.

Can a smartwatch really measure blood pressure?

The Yamay smartwatch is a reliable fitness tracker that accurately monitors your blood pressure, heart rate, and blood oxygen.

Do smartwatches give accurate blood pressure readings?

To get an accurate reading when taking your blood pressure with a wrist monitor, your arm and wrist must be at heart level. Even then, blood pressure measurements taken at the wrist are usually higher and less accurate than those taken at your upper arm.

How does a smartwatch check your blood pressure?

The technology

The Heartisans Watch uses Pulse Transit Time (PTT) to measure your blood pressure using two sensors on the watch: 1) Electrocardiogram (ECG) sensor, and 2) Optical Heart Rate (PPG) sensor.

How does smartwatch detect heart rate?

Modern smartwatches use a flashing green light to measure your heart rate from your wrist. Spectroscopy tells us that blood absorbs green light because red and green are opposite each other on the colour wheel. The rear of the smartwatch contains an optical sensor to detect the reflected light.

How does a smartwatch measure oxygen levels?

In the reflectance oximetry, which is used in smartwatches and fitness bands, the SPO2 is measured through the light that reflects from the blood under the skin. This is because the light emitting sensors as well the sensors that read the light are both on one side.