Are electrocardiograms thermal paper

Time : 2022-08-11

With the continuous popularity of thermal paper, we can see them in various scenes, so what other unexpected uses are there? In fact, thermal paper is also widely used in medical paper, ECG drawings, fetal monitoring paper, etc., which are all thermal paper in essence. We will give you a detailed answer on this aspect below.

1. What is an electrocardiogram?
ECG chart, a kind of processed paper used with ECG machine. First, a layer of carbon black is coated on the base paper as a base, and then a layer of white paint is coated, so that the surface is the same as ordinary white paper in appearance. Then print the coordinate grid. When the "hot head" of the electrocardiograph is in contact with the paper surface, the coating is melted away, showing black lines, and corresponding corrugated lines are obtained.

2. What is thermal paper?
Thermal paper is also known as thermal fax paper, thermal recording paper, thermal copy paper, and in Taiwan, it is called thermal copy paper. Thermal paper is a processed paper whose manufacturing principle is to coat a layer of "thermal paint" (thermal discoloration layer) on the base paper. Although there are more than a dozen chemicals used in this color-changing layer, there are at least the following compounds: leuco dyes, which have a wide variety, and fluorescent compounds are commonly used; There are bisphenol and p-hydroxybenzoic acid; sensitizers account for less than 10%, including benzenesulfonic acid amide compounds; fillers account for less than 50%, commonly used calcium carbonate (particles); adhesive Agents account for less than ten percent, such as polyvinyl acetate; stabilizers, such as dibenzoyl terephthalate; lubricants, etc. Therefore, the process is difficult and the technical requirements are high.

3. Why use thermal paper for ECG drawings?
● Easy to replace - the paper can be replaced without opening, which is very important for medical equipment.
● Simple structure and high reliability - thermal paper is equivalent to "self-contained ink", which saves the trouble of replacing the ink paper separately, and only relative sliding between the heat source and the paper during printing, the stability and reliability are guaranteed .
● The principle is similar - the principle of thermal printing is exactly the same as the principle of [the change of the potential of a point on the body surface with time] embodied by the electrocardiogram.

Fourth, the application of thermal paper medical consumables
Thermal paper is used as a recording material in medical consumables and measurement systems, such as electrocardiogram, B-ultrasound paper, etc. Thermal paper can be used to print ECG drawings, record the patient's ECG, and serve as an important basis for doctors to diagnose and analyze patients. It can be said that the progress and maturity of medicine is inseparable from the support of modern science and technology. In the past, doctors paid attention to seeing, hearing, and asking, but modern scientific instruments can intuitively detect the patient's physical condition. Coupled with the doctor's rich medical experience, they can accurately judge the patient's physical condition, so that they can prescribe the right medicine and diagnose by looking at pictures. advantage of modern medicine. And thermal paper provides drawings for the recording of advanced instruments. These drawings are also called medical paper, which can be said to be an indispensable part of the process.

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