Artificial heart

-

ARTIFICIAL  HEART(1963)



                  The artificial heart is a machine that pumps blood around the body and is designed to replace the natural heart when it no longer works efficiently due to conditions such as heart failure. paul winchell (1922-2005), a U.S. television ventriloquist, was the unlikely inventor of the artificial heart.

                   At a cast party, wicnhell met surgery Dr. Henry Heimlich, inventor of the Heimlich maneuver for choking. After observing Heimlich in his operating room, Winchell thought that an artificial heart could keep blood pumping in during difficult open-heart procedures. with Heimlich advice, Winchell designed an artificial heart and built the first prototype. He filed for a patent in 1956, which he received in 1963.


                                     



                Winchell donated the rights to his design to the University of Utah, allowing Robert Jarvik and others to build an artificial heart, dubbed the Jarvik-7. Jarvik introduced an ovoid shape to fit inside the human chest, and used a more suitable polyurethane material, The Jarvik-7 had two pumps (likes the ventricles), each with a disk-shaped mechanism that pushed the blood from the inlet valve to the outlet valve.

                On december 2,1982, Dr. William DeVries implanted the first artificial heart into retired dentist Dr. Barney Clark, who survived 112 days with the device in place.
                 
                 Artificial hearts, or left ventricular assist devices as they are commonly called, are now used as a bridge to keep alive patients with heart failure until donor hearts become available. Modern devices are much smaller; they do not need to store blood because constant flow-impeller pumps are used to keep the blood permanently circulating around the body.

                                               "The valves and chamber were not unlike the moving  eyes and closing mouth of a puppet."  
                                                                                                                                        -Paul Winchell


Comments

Post a Comment

Popular posts from this blog

Short wave diathermy

-
Image
       The diathermy means, 'through heating' or producing deep heating directly in the tissues of the body.          Externally applied sources of heat like hot towels, infrared lamps and electric heating pads often produce discomfort and skin burns long before adequate heat has penetrated to the deeper tissues.          But with the diathermy technique, the subject's body becomes a part of the electrical circuit and the heat is produced within the body and not transferred through the skin.          The heating of the tissues is carried out by high frequency alternating current which generally has a frequency of 27.12 MHz and wavelength of 11m. The short wave diathermy machine consists of 2 main circuits.                       * Oscillating circuit - which produces a high frequency current.              ...
Read more

Electrocardiogram

-
Image
    ELECTROCARDIOGRAM       An electrocardiogram  records the electrical signals in the heart .  It's a common and painless test used to quickly detect heart problems and monitor the heart's health.      Electrical signals from the heart characteristically precede the normal mechanical function and monitoring of these signals has great clinical significance.     ECG provides valuable information about wide range of cardiac disorders such as the presence of an inactive part(infarction) or an enlargement (cardiac hypertrophy) of the heart muscle. ECG WAVEFORM P Wave:  Atrial depolarization          T Wave:  Ventricular repolarization                                         QRS Complex:  Ventricular depolarization   ECG BLOCK DIAGRAM     ...
Read more

History of Artificial limb

-
Image
  Artificial limb (c. 550 B.C.E)         The earliest written reference to an artificial limb occurs in an epic Indian poem"Rig-Veda", which was compiled between 35000 and 1800 B.C.E written in Sanskrit the poem includes a description of the amputation of the warrior Queen vishpla's leg during battle. Later fitted with an iron prosthesis by the Ashvins (celestial physicians),she returned to combat.        Most authorities doubt the story of Queen Vishpla, and turn to the Histories of Herodotus for the first plausible reference to a prosthetic limb. Herodotus describes how, in the mid sixth century B.C.E.,Hegesistratus of Eli's, a Persian soldier and seer imprisoned by the Spartans, was sentenced to death, and cut off part of his foot to escape from the stocks. Hegesistratus fashioned a wooden prosthesis to help walk the 30 miles (48 km) to Tregea, but unfortunately was captured by Zaccynthius and beheaded.          ...
Read more