Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia, Wikipedia.
Related to patent: patent law
The symptoms of patent ductus arteriosus are usually so slight that they are not noticed until the child is older and more active. He then begins to experience dyspnea on exertion. If the ductus is large there may be retardation of growth. Pulmonary congestion may result from poor left ventricular function. The heart compensates through hypertrophy and dilation.
Treatment is surgical ligation of the open ductus, preferably when the child is from 4 to 10 years of age. Prognosis, when the condition is not accompanied by other congenital heart defects, is excellent.
The ductus may remain open in as many as 10 per cent of preterm infants, especially those under 1500 grams. If the shunt across the ductus is large, heart failure can occur and surgical repair may be necessary. Investigators into the effects of the prostaglandins have reported that closure of a patent ductus arteriosus can be produced in preterm infants by administration of an inhibitor of prostaglandin formation. Conversely, in neonates suffering from severe complex congenital heart defects in which an open ductus arteriosus could be beneficial, injections of prostaglandins have been used to keep the channel open.
pa·tent(pā'tĕnt), Avoid the mispronunciation păt'ent.
adjective Open, not occluded; unobstructed; referring to a duct, lumen or vessel.
noun A document that grants an inventor, in terms of a determined number of years, the exclusive right to make use of and sell his or her invention.
patentadjective pronounced, pay-tent Open, unobstructed, referring to a duct, lumen, or vessel noun pronounced, pah-tent A document that grants an inventor in terms of a determined number of years, the exclusive right to make use of and sell his invention
Patient discussion about patent
Q. How open are you about telling people that you are bipolar? I am studying in a coed college and am high scoring and talented. Actually I am a guitarist who entertains most of my peers. So I have lots of friends. For the past 8 months I could not use my guitar because of my busy study schedule. Without music I feel very depressed. My attitude has changed. My friends started deserting me because of my depression. So I started hating life and checked with a psychiatrist who diagnosed as bipolar. I fear whether I will lose my friends. So this question is to bipolar people: How open are you about telling people that you are bipolar?
Q. what are the do and don't do of Allergic people when they go out side to the open land?
Q. what is the best thing to do to eliminate or to let it be remove without surgery?I'm afraid but laser mayb ok If I can go for laser where can you suggest coz I'm jobless and can't afford to pay.Or is there some remedy that i can take to melt those stones inside my bladder then they can come out through my waste ?
I am not familiar with the cost of such procedure.