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Instillation abortion

From Wikipedia, the free encyclopedia

Instillation abortion
Background
Abortion typeSurgical
First use1934
Last useUsage has declined in U.S. since the 1970s.
Gestation16-24 weeks
Usage
United States0.9% (2003)
Infobox references

Instillation abortion is a rarely used method of late-term abortion, performed by injecting a solution into the uterus.

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Transcription

Procedure

Instillation abortion is performed by injecting a chemical solution consisting of either saline, urea, or prostaglandin through the abdomen and into the amniotic sac. The cervix is dilated prior to the injection, and the chemical solution induces uterine contractions which expel the fetus.[1] Sometimes a dilation and curettage procedure is necessary to remove any remaining fetal or placenta tissue.[2]

Instillation methods can require hospitalization for 12 to 48 hours.[2] In one study, when laminaria were used to dilate the cervix overnight, the time between injection and completion was reduced from 29 to 14 hours.[3]

Usage

The method of instillation abortion was first developed in 1934 by Eugen Aburel.[4] It is most frequently used between the 16th and 24th week of pregnancy, but its rate of use has declined dramatically in recent years.[2] In 1968, abortion by the instillation of saline solution accounted for 28% of those procedures performed legally in San Francisco, California.[5] Intrauterine instillation (of all kinds) declined from 10.4% of all legal abortions in the U.S. in 1972 to 1.7% in 1985,[6] falling to 0.8% of the total incidence of induced abortion in the United States during 2002,[7] and 0.1% in 2007.[8]

In a 1998 Guttmacher Institute survey, sent to hospitals in Ontario, Canada, 9% of those hospitals in the province which offered abortion services used saline instillations, 4% used urea, and 25% used prostaglandin.[9] A 1998 study of facilities in Nigeria which provide abortion found that only 5% of the total number in the country use saline.[10]

Complications

Once in common practice, abortion by intrauterine instillation has fallen out of favor, due to its association with serious adverse effects and its replacement by procedures which require less time and cause less physical discomfort.[11]

Saline is in general safer and more effective than the other intrauterine solutions because it is likely to work in one dose. Prostaglandin is fast-acting, but often requires a second injection, and carries more side effects, such as nausea, vomiting, and diarrhea.[2]

Instillation of either saline or prostaglandin is associated with a higher risk of immediate complications than surgical D&C.[12] Dilation and evacuation is also reported to be safer than instillation methods.[13] One study found that the risk of complications associated with the injection of a combination of urea and prostaglandin into the amniotic fluid was 1.9 times that of D&E.[13]

The rate of mortality reported in the United States between 1972 and 1981 was 9.6 per 100,000 for instillation methods. This is in comparison to rates of 4.9 per 100,000 for D&E and 60 per 100,000 for abortion by hysterotomy and hysterectomy.[13]

There have been at least two documented cases of unsuccessful instillation abortions that resulted in live births.[14][15]

References

  1. ^ James, Denise. (2006). Therapeutic Abortion. Retrieved February 24, 2009.
  2. ^ a b c d UIHC Medical Museum. (2006) The Facts of Life: Examining Reproductive Health. Retrieved August 14, 2006.
  3. ^ Stubblefield, Phillip G., Carr-Ellis, Sacheen, & Borgatta, Lynn. (2004). Methods of Induced Abortion Archived 2008-02-27 at the Wayback Machine. Obstetrics & Gynecology, 104 (1), 174-185. Retrieved August 14, 2006.
  4. ^ Potts DM (January 1970). "Termination of pregnancy". Br. Med. Bull. 26 (1): 65–71. doi:10.1093/oxfordjournals.bmb.a070745. PMID 4904688.
  5. ^ Goldstein P, Stewart G (May 1972). "Trends in therapeutic abortion in San Francisco". Am J Public Health. 62 (5): 695–9. doi:10.2105/AJPH.62.5.695. PMC 1530244. PMID 5024298.
  6. ^ Lawson, Herschel W.; Atrash, Hani K.; Saftlas, Audrey F.; Koonin, Lisa M.; Ramick, Merrell; Smith, Jack C. (September 1989). "Abortion surveillance, United States, 1984-1985". MMWR. CDC Surveillance Summaries. 38 (2): 11–45. PMID 2506423.
  7. ^ Strauss, Lilo T; Herndon, Joy; Chang, Jeani; Parker, Wilda Y; Bowens, Sonya V; Berg, Cynthia J (25 November 2005). "Abortion surveillance--United States, 2002". Morbidity and Mortality Weekly Report. Surveillance Summaries. 54 (7): 1–31. PMID 16304556.
  8. ^ Pazol, Karen; Zane, Suzanne; Parker, Wilda Y; Hall, Laura R; Gamble, Sonya B; Hamdan, Saeed; Berg, Cynthia; Cook, Douglas A; Centers for Disease Control and Prevention (CDC) (25 February 2011). "Abortion surveillance - United States, 2007". Morbidity and Mortality Weekly Report. Surveillance Summaries. 60 (1): 1–42. PMID 21346710.
  9. ^ Ferris LE, McMain-Klein M, Iron K (1998). "Factors influencing the delivery of abortion services in Ontario: a descriptive study". Fam Plann Perspect. 30 (3): 134–8. doi:10.2307/2991628. JSTOR 2991628. PMID 9635262.
  10. ^ Henshaw, Stanley K.; Singh, Susheela; Oye-Adeniran, Boniface A.; Adewole, Isaac F.; Iwere, Ngozi; Cuca, Yvette P. (December 1998). "The Incidence of Induced Abortion in Nigeria". International Family Planning Perspectives. 24 (4): 156–164. doi:10.2307/2991973. JSTOR 2991973.
  11. ^ Elective Abortion at eMedicine
  12. ^ Ferris LE, McMain-Klein M, Colodny N, Fellows GF, Lamont J (June 1996). "Factors associated with immediate abortion complications". CMAJ. 154 (11): 1677–85. PMC 1487918. PMID 8646655.
  13. ^ a b c Grimes DA, Schulz KF (July 1985). "Morbidity and mortality from second-trimester abortions". J Reprod Med. 30 (7): 505–14. PMID 3897528.
  14. ^ Elliott, Jane (6 December 2005). "I survived an abortion attempt". BBC News.
  15. ^ P. Clarke; J. Smith; T. Kelly; MJ Robinson (January 2005). "An infant who survived abortion and neonatal intensive care". Journal of Obstetrics and Gynaecology. 25 (1): 73–4. doi:10.1080/01443610400025945. hdl:10019.1/36962. PMID 16147706. S2CID 6094614.
This page was last edited on 22 April 2022, at 16:28
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