placenta praeviaplacenta previan.

Brit.

/pləˌsɛntə ˈpriːvɪə/, U.S.

/pləˌsɛn(t)ə ˈpriviə/

Forms: 1700s– placenta praevia, 1900s– placenta previa.

Origin: A borrowing from Latin. Etymon: Latin placenta praevia.

Etymology: < post-classical Latin placenta praevia (1754 or earlier) < placenta placenta n. + classical Latin praevia , feminine of praevius going before (see previous adj., adv., and n.).

Obstetrics.

Implantation of the placenta in the lower part of the uterus, esp. so as to cause partial or total obstruction of the internal os of the cervix, which tends to result in haemorrhage during delivery.Placenta praevia is classified as total, complete, or central if the os is entirely blocked, partial or incomplete if the os is partially blocked, and marginal if the placenta extends to but does not block the os.

ΘΚΠ

the world > health and disease > ill health > a disease > disorders of internal organs > disorders of pregnancy or birth > [noun] > disorders of placenta

placenta praevia1785

placentitis1836

1785 J. Aitken Princ. Midwifery (ed. 2) iii. 106 Placenta-presentation (placenta prævia) takes place when it happens to adhere to the circumference of the os internum.

1856 Retrospect of Med. 33 381 The author then explained the mode and mechanism by which the hemorrhage in placenta prævia is arrested.

1858 R. Barnes Physiol. & Treatm. Placenta Prævia i. 30 Dr. Legroux says, that placenta prævia mostly occurs in pluriparæ.

1917 H. H. Richardson Fortunes Richard Mahony I. ii. viii. 165 He re-lived those days when a skilfully handled case of placenta previa, or a successful delivery in the fourth position, had meant more to him than the Charge of the Light Brigade.

1943 W. Shaw Textbk. Midwifery xvii. 315 The diagnosis of placenta prævia depends upon the palpation of the placenta within fingers' reach of the internal os.

1974 J. P. Greenhill & E. A. Friedman Biol. Princ. & Mod. Pract. Obstetr. xxxvii. 418/1 In total placenta previa the bleeding usually occurs earlier than in partial placenta previa and is more profuse.

1991 Lancet 9 Mar. 621/1 Central placenta praevia can be diagnosed in early pregnancy, especially when the relation of the placental tissue to the os and the endocervical canal is noted.

This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022).

单词	placenta praevia
释义	placenta praeviaplacenta previan. Brit. /pləˌsɛntə ˈpriːvɪə/, U.S. /pləˌsɛn(t)ə ˈpriviə/ Forms: 1700s– placenta praevia, 1900s– placenta previa. Origin: A borrowing from Latin. Etymon: Latin placenta praevia. Etymology: < post-classical Latin placenta praevia (1754 or earlier) < placenta placenta n. + classical Latin praevia , feminine of praevius going before (see previous adj., adv., and n.). Obstetrics. Implantation of the placenta in the lower part of the uterus, esp. so as to cause partial or total obstruction of the internal os of the cervix, which tends to result in haemorrhage during delivery.Placenta praevia is classified as total, complete, or central if the os is entirely blocked, partial or incomplete if the os is partially blocked, and marginal if the placenta extends to but does not block the os. ΘΚΠ the world > health and disease > ill health > a disease > disorders of internal organs > disorders of pregnancy or birth > [noun] > disorders of placenta placenta praevia1785 placentitis1836 1785 J. Aitken Princ. Midwifery (ed. 2) iii. 106 Placenta-presentation (placenta prævia) takes place when it happens to adhere to the circumference of the os internum. 1856 Retrospect of Med. 33 381 The author then explained the mode and mechanism by which the hemorrhage in placenta prævia is arrested. 1858 R. Barnes Physiol. & Treatm. Placenta Prævia i. 30 Dr. Legroux says, that placenta prævia mostly occurs in pluriparæ. 1917 H. H. Richardson Fortunes Richard Mahony I. ii. viii. 165 He re-lived those days when a skilfully handled case of placenta previa, or a successful delivery in the fourth position, had meant more to him than the Charge of the Light Brigade. 1943 W. Shaw Textbk. Midwifery xvii. 315 The diagnosis of placenta prævia depends upon the palpation of the placenta within fingers' reach of the internal os. 1974 J. P. Greenhill & E. A. Friedman Biol. Princ. & Mod. Pract. Obstetr. xxxvii. 418/1 In total placenta previa the bleeding usually occurs earlier than in partial placenta previa and is more profuse. 1991 Lancet 9 Mar. 621/1 Central placenta praevia can be diagnosed in early pregnancy, especially when the relation of the placental tissue to the os and the endocervical canal is noted. This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022). < n.1785
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