What is the Normal Range of Pleth Values?

Update Date: 2024-06-07 Source: Network

Pleth generally refers to the plethysmographic pulse rate and pulse strength, typically ranging from 60 to 100 times per minute. Since it is data detected by a monitor within 24 hours, the measured values are generally accurate. If there is excessive carbon dioxide in the breath, the pleth graph will become a straight line. It is important to maintain good lifestyle habits. For patients with arrhythmia, it is recommended to avoid strenuous exercise and emotional excitement. If accompanied by other cardiovascular and cerebrovascular diseases, timely treatment is necessary to prevent other complications.

Pleth is an important parameter on the electrocardiographic monitoring instrument, mainly representing the plethysmographic pulse rate and pulse strength of the body. The normal value of Pleth is 60-100 times per minute. The generation of the pulse is due to the lateral pressure on the blood vessels caused by the blood being pumped out by the heart. The periodic expansion and contraction of the heart lead to changes in vascular pressure. The intravascular pressure, volume, displacement, and wall tension are important factors that affect the pulse. The electrocardiographic monitoring instrument utilizes this characteristic of the pulse by placing a photoelectric plethysmographic sensor on the patient's fingertip or auricle to receive wavelength signals of oxygenated hemoglobin in arterial blood, blood flow, and vascular pressure. This allows the calculation of blood oxygen saturation, plethysmographic pulse rate, pulse strength, and CO2 content in the patient's blood, resulting in a series of dynamic monitoring data.

The monitoring waveform of Pleth is negatively correlated with the CO2 content in the body. When there is excessive carbon dioxide exhaled, the Pleth curve appears as a straight line, and the patient may require respiratory training and intervention. In clinical work, electrocardiographic monitoring is used for critically ill patients, surgical patients, and pregnant and postpartum women to monitor heart rate, blood pressure, respiration, blood oxygen saturation, mean arterial pressure, and other vital signs. It provides real-time feedback on changes in the patient's condition.

The role of electrocardiographic monitoring includes:

Monitoring the vital signs of patients with coronary heart disease, myocardial infarction, and heart failure.
Timely detection and diagnosis of fatal arrhythmias to guide anti-arrhythmia treatment.
Monitoring the vital signs of surgical patients before, during, and after surgery to assess bleeding and electrolyte imbalances.
Monitoring the vital signs of pregnant and postpartum women and fetal vital signs.