Category: H
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Heater probe
A surgical instrument that is advanced through an endoscope and used to cauterize bleeding peptic ulcers. The probe applies thermal energy directly to the bleeding vessel, and works best when it is pressed forcefully onto the lesion.
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Heart-lung preparation
In animal studies and in open-heart surgery, the use of devices that take over the function of the heart and lungs while those organs are being treated or possibly replaced.
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Hydatid pregnancy
Pregnancy giving rise to a hydatidiform mole.
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High-risk pregnancy
A pregnancy in which maternal factors such as diabetes mellitus, hypertension, kidney disease, viral infections, vaginal bleeding, multiple pregnancies, substance abuse, age under 17 or over 35, or toxic exposures are present. Pregnancy in association with these conditions is more likely to compromise the health of the mother or developing fetus than are normal pregnancies.…
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Heterotopic pregnancy
Combined intrauterine and extrauterine pregnancies.
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Heidenhain pouch
A small, surgically constructed pouch of the stomach that is denervated and separated from the stomach and drained to the outside of the body. It is used to study the physiology of the stomach.
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Hyperlordotic posture
Increased lumbar lordosis without compensation in the thoracic or cervical spine. It is a component of the condition colloquially referred to as sway-back.
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Horizontal abdominal position
A position in which the patient lies flat on the abdomen, feet extended; employed in examination of the back and spinal column.
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Horizontal position
A position in which the patient lies supine with feet extended. It is used in palpation, in auscultation of fetal heart, and in operative procedures.
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Hepatic portoenterostomy
A surgical procedure performed to establish bile flow in an infant who has external biliary atresia associated with absence of the extrahepatic biliary system. A section of the jejunum is attached to the liver at the normal exit site of the hepatic duct to allow bile drainage into the small intestine. The jejunal segment may…