duplex placenta - определение. Что такое duplex placenta
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Что (кто) такое duplex placenta - определение

PLACENTA DISEASE THAT IS CHARACTERIZED BY PLACENTA ATTACHMENT TO THE UTERINE WALL CLOSE TO OR COVERING THE CERVIX
Placenta previa; Praevia placenta

Duplex (telecommunications)         
  • A simple illustration of a full-duplex communication system. Full-duplex is not common in handheld radios as shown here due to the cost and complexity of common duplexing methods, but is used in [[telephone]]s, [[cellphone]]s and [[cordless phone]]s.
  • A simple illustration of a half-duplex communication system
COMMUNICATION FLOWING IN BOTH DIRECTIONS SIMULTANEOUSLY
Half-duplex; Full-duplex; Time-division duplex; Frequency division duplex; Duplexing; Frequency duplex; Full duplex; Duplex communication; Half duplex; Duplex Communication; Duplex (Telecommunications); Duplex (communications); Duplex transmission; Full-duplexed; Duplex channel; Duplex telecommunications; Full Duplex; Two-way simultaneous; Time division duplex; Half Duplex; Frequency-Division Duplex; Frequency division duplexing; Half duplex communication; Frequency-division duplex; Duplex conversation; Half-duplex conversation; Full-duplex conversation; Half-duplex operation; Dual-simplex; Dual simplex; Transmit/receive transition gap; Receive/transmit transition gap; Semiduplex
A duplex communication system is a point-to-point system composed of two or more connected parties or devices that can communicate with one another in both directions. Duplex systems are employed in many communications networks, either to allow for simultaneous communication in both directions between two connected parties or to provide a reverse path for the monitoring and remote adjustment of equipment in the field.
placenta praevia         
['pri:v??]
(US placenta previa)
¦ noun Medicine a condition in which the placenta partially or wholly blocks the neck of the uterus, so interfering with normal delivery of a baby.
Origin
C19: from L. praevia 'going before', feminine of praevius.
half-duplex         
  • A simple illustration of a full-duplex communication system. Full-duplex is not common in handheld radios as shown here due to the cost and complexity of common duplexing methods, but is used in [[telephone]]s, [[cellphone]]s and [[cordless phone]]s.
  • A simple illustration of a half-duplex communication system
COMMUNICATION FLOWING IN BOTH DIRECTIONS SIMULTANEOUSLY
Half-duplex; Full-duplex; Time-division duplex; Frequency division duplex; Duplexing; Frequency duplex; Full duplex; Duplex communication; Half duplex; Duplex Communication; Duplex (Telecommunications); Duplex (communications); Duplex transmission; Full-duplexed; Duplex channel; Duplex telecommunications; Full Duplex; Two-way simultaneous; Time division duplex; Half Duplex; Frequency-Division Duplex; Frequency division duplexing; Half duplex communication; Frequency-division duplex; Duplex conversation; Half-duplex conversation; Full-duplex conversation; Half-duplex operation; Dual-simplex; Dual simplex; Transmit/receive transition gap; Receive/transmit transition gap; Semiduplex
<communications> (hdx, from telegraphy) 1. A type of communication channel using a single circuit which can carry data in either direction but not both directions at once. Compare: simplex, full-duplex. 2. An obsolete term for local echo. (2001-07-21)

Википедия

Placenta praevia

Placenta praevia is when the placenta attaches inside the uterus but in a position near or over the cervical opening. Symptoms include vaginal bleeding in the second half of pregnancy. The bleeding is bright red and tends not to be associated with pain. Complications may include placenta accreta, dangerously low blood pressure, or bleeding after delivery. Complications for the baby may include fetal growth restriction.

Risk factors include pregnancy at an older age and smoking as well as prior cesarean section, labor induction, or termination of pregnancy. Diagnosis is by ultrasound. It is classified as a complication of pregnancy.

For those who are less than 36 weeks pregnant with only a small amount of bleeding recommendations may include bed rest and avoiding sexual intercourse. For those after 36 weeks of pregnancy or with a significant amount of bleeding, cesarean section is generally recommended. In those less than 36 weeks pregnant, corticosteroids may be given to speed development of the baby's lungs. Cases that occur in early pregnancy may resolve on their own.

It affects approximately 0.5% of pregnancies. After four cesarean sections, however, it affects 10% of pregnancies. Rates of disease have increased over the late 20th century and early 21st century. The condition was first described in 1685 by Paul Portal.