Dual Head Stainless Steel Stethoscope:It is the most commonly used diagnostic tool and the symbol of doctors. Modern medicine began with the invention of stethoscope. Stethoscope has been used in clinic since March 8, 1817. It is mainly composed of pickup part (chest part), conduction part (rubber tube) and hearing part (ear part)

Product description

It is usually composed of auscultation head, sound guide tube and ear hook. Nonlinear amplification (frequency) of the collected sound[

Intended use

It is used to collect and amplify sounds from the heart, lungs, arteries, veins and other internal organs.

Size of auscultation head

The larger the contact surface between the auscultation head and the body, the better the sound effect. However, there is an arc on the surface of the human body. If the chest is too large, the auditory head can not fully contact the human body, and the sound can not be picked up well, but also leak out from the gap. Therefore, the size of the auscultation head should be based on clinical needs. The diameter of stethoscope chest parts is almost uniform between 45-50 mm. For example, the diameter of pediatric chest parts is generally 30 mm and that of newborns is 18 mm.

Material of stethoscope

Material plays an important role in sound effect. Sound is transmitted through air or material, and finally transformed into heat energy. The transmission of sound waves has little attenuation in heavy metals, and attenuation is easy to occur in lighter metals or plastics. Therefore, high-grade stethoscopes must use heavy metals such as stainless steel or even titanium. [1]

Conducting part of stethoscope

The sound transmission pipeline is also important. The larger the inner diameter of the pipeline, the shorter the length and the thicker the pipe wall, the better the effect of the stethoscope. The international standard length is 27 inches. The sound transmission pipeline of modern stethoscope is generally made of PVC, with good sound effect and beautiful appearance, but poor tensile resistance. It is often bent and easily broken after stretching. After using the stethoscope, she should be hung flat on both sides of her neck, which can be seen in foreign TV dramas. It is the standard method to wear a high-quality Dual Head Stainless Steel stethoscope.

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