from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A clamp used to regulate or close a flexible tube, especially in laboratory apparatus.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A clamp on a flexible pipe to regulate the flow of fluid.
from the GNU version of the Collaborative International Dictionary of English
- n. A clamp on a flexible pipe to regulate the flow of a fluid through the pipe.
from The Century Dictionary and Cyclopedia
- n. A clamp for compressing a flexible pipe, either to regulate the flow of a liquid through it or to serve as a stopcock by holding the sides of the tube in contact.
An inspection of the cadaveric diaphragm from below will demonstrate an arrangement like double shears admirably adapted to this "pinchcock" action.
In passing it may be stated that the pinchcock action, plus the kinking of the esophagus normally prevents regurgitation when a man with a full stomach "stands on his head" or inverts his body.
_Treatment of hiatal esophagismus (so-called cardiospasm) _ consists in the over-dilatation of the "diaphragmatic pinchcock" or hiatus esophageus, and in proper remedial measures for the removal of the underlying neurosis.
It is the failure of the diaphragmatic pinchcock to open, as in the normal deglutitory cycle, rather than a spasmodic tightness, that obstructs the food.
The esophagoscope encounters only the diaphragmatic pinchcock which seems to be at the top of the stomach like the puckering string at the top of a bag.
It is simply the failure of the diaphragmatic pinchcock to open normally in the deglutitory cycle.
The top of the stomach seems to be closed by the diaphragmatic pinchcock in the same way that the top of a bag is closed by a puckering string.
Regurgitation of food from the stomach is normally prevented by the hiatal muscular diaphragmatic closure (called by the author the "diaphragmatic pinchcock") plus the kinking of the abdominal esophagus.
The author has called the hiatal closure the "diaphragmatic pinchcock."
The _treatment of diffuse esophageal dilatation_ consists in dilating the "diaphragmatic pinchcock" that is, the hiatal esophagus.