The Karman cannula is a soft, flexible cannula (or curette) used in medical procedures that was popularized by Harvey Karman in the early 1970s.[1] The flexibility of the Karman cannula was claimed to reduce the risk of perforating the uterus during vacuum aspiration.[2] Both Karman's procedure, menstrual extraction, and his cannula were embraced by activists Carol Downer and Lorraine Rothman, who modified the technique in 1971 and promoted it.[3] The "self-help" abortion movement envisioned by Downer and Rothman never entered the mainstream in the U.S. before or after Roe v. Wade. Physicians sometimes use a Karman cannula in early induced surgical abortion, in treatment of incomplete abortion, and in endometrial biopsy. In 2010, a Sri Lankan physician named Geeth Silva was the first physician to use the Karman cannula in the removal of impacted faeces from a patient; this was done in Columbo at the Sri Jayawardenepura General Hospital. Physicians and other health care providers sometimes use a Karman cannula in "menstrual regulation" vacuum aspiration procedures in developing countries where abortion is illegal (e.g. Bangladesh).[4]

References

  1. ↑ Harvey Karman, Malcolm Potts, "VERY EARLY ABORTION USING SYRINGE AS VACUUM SOURCE", The Lancet, Volume 299, Issue 7759, 1972, Pages 1051-1052, doi:10.1016/S0140-6736(72)91225-1
  2. ↑ Ekwempu CC (1990). "Uterine aspiration using the Karman cannula and syringe". Tropical Journal of Obstetrics and Gynaecology. 8 (2): 37–8. PMID 12179281.
  3. ↑ "Self Help Clinic Celebrates 25 Years". Feminist Women's Health Center.
  4. ↑ The use of Cannulas in the Aesthetic Industry

Further reading

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