听诊器(国外英文资料).docVIP

听诊器 In Paris, France in 1816, Dr. Rene Theophile Hyacinthe Laennec accepts when the patient with a piece of paper into a cylinder, side in the area before the heart and ears, on the other end, found that hear heart sounds auscultation is more clear than before with ears stick directly on your mind, it can be said to be the prototype of the stethoscope, through experiments, in 1819, he made a simple wooden stethoscope (see below), the same year he published the auscultation characteristics of the disease. In 1843, George p. Cammann of New York invented the binaural stethoscope, also known as the carman stethoscope, which enables both ears to hear the heart. Then develops slowly, until the last century 60 s of the Harvard University school of medicine, Dr. Littmann envisions a ideal portable stethoscope, possess dual chest piece (bell type and membrane type), and will become a reality, is the milestone of the development history of the stethoscope. And todays advanced electronic stethoscope can magnify sound 18 times, can connect PC, can use software to analyze! The development of stethoscope, the contribution of cardioascular doctors is greatest! Dr. Littmann is a cardiologist (why not our breathing family!!!). The company made the fine Littmann stethoscope for its brand name, and another famous brand, Welch Allyn? Tycos Harvey Elite is also from cardiovascular physician Dr. W. Proctor Harveys founding, and Sprague wrote - Rappaport, ADC, DRG, such as brand, knows little European brands Europe, philips has a two, with europeans making sound of the language and culture accumulation should not bad, Japan have bell modest, please see the following: Foreign doctors are very conscious of their own image, not to mention the stethoscope! Foreign doctors put their names on the pipes: Or on the chest, the laser is carved out and usually costs more than ten dollars Of course also have ID card 3 m? Littmann? Stethoscope, including: master cardiologist, cardiologist stethoscope