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The 'cone valve chest' became popular in nineteenth-century Germany when E.F. Walcker refined its design. Its concept is similar to that of the slider chest, except that the mechanisms for admitting wind to each note and activating each stop are reversed. In a cone valve chest, the windchest is divided into 'stop channels' instead of key channels.
The 12-lead ECG has a total of three limb leads and three augmented limb leads arranged like spokes of a wheel in the coronal plane (vertical), and six precordial leads or chest leads that lie on the perpendicular transverse plane (horizontal). [33] Leads should be placed in standard positions.
A normal chest X-ray after placement of an ICD, showing the ICD generator in the upper left chest and the ICD lead in the right ventricle of the heart. Note the 2 opaque coils along the ICD lead. The process of implantation of an ICD system is similar to implantation of an artificial pacemaker. In fact, ICDs are composed of an ICD generator and ...
Surgical positioning is the practice of placing a patient in a particular physical position during surgery. The goal in selecting and adjusting a particular surgical position is to maintain the patient's safety while allowing access to the surgical site. Often a patient must be placed in an unnatural position to gain access to the surgical site ...
The Trendelenburg position may be used for drainage images during endoscopic retrograde cholangiopancreatography. [10] The Trendelenburg position is reasonable in those with a cord prolapse who are unable to achieve a knee-to-chest position. [11] It is a temporary measure until a cesarean section can be performed. [11]
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A thoracotomy is a surgical procedure to gain access into the pleural space of the chest. [1] It is performed by surgeons (emergency physicians or paramedics under certain circumstances) to gain access to the thoracic organs, most commonly the heart, the lungs, or the esophagus, or for access to the thoracic aorta or the anterior spine (the latter may be necessary to access tumors in the spine).
A Lewis Lead (also called the S5 lead) is a modified ECG lead used to detect atrial flutter waves when atrial flutter is suspected clinically, based on signs and symptoms, but is not definitely demonstrated on the standard 12 lead ECG. In order to create the Lewis Lead, the right arm electrode is moved to the manubrium adjacent to the sternum ...