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Culdocentesis
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Culdocentesis

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Culdocentesis is a procedure that checks for abnormal fluid in the space just behind the vagina. This area is called the cul-de-sac.

First, you will have a pelvic examination. Then, the health care provider will grasp the cervix with an instrument and lift it slightly.

A long, thin needle is inserted through the wall of the vagina (just below the uterus). A sample is taken of any fluid found in the space. The needle is pulled out.

I Would Like to Learn About:

  • How the Test is Performed

    First, you will have a pelvic examination. Then, the health care provider will grasp the cervix with an instrument and lift it slightly.

    A long, thin needle is inserted through the wall of the vagina (just below the uterus). A sample is taken of any fluid found in the space. The needle is pulled out.

  • How to Prepare for the Test

    You may be asked to walk or sit for a short time before the test is done.

  • How the Test Will Feel

    You may have an uncomfortable, cramping feeling. You will feel a brief, sharp pain as the needle is inserted.

  • Why the Test is Performed

    This procedure is rarely done today because a transvaginal ultrasound can show fluid behind the vagina.

    It may be done when:

    • You have pain in the lower abdomen and pelvis, and other tests suggest there is fluid in the area
    • You may have a ruptured ectopic pregnancy or ovarian cyst
  • Normal Results

    No fluid in the cul-de-sac, or a very small amount of clear fluid, is normal.

  • What Abnormal Results Mean

    Fluid may still be present, even if not seen with this test. You may need other tests.

    A sample of fluid may be taken and tested for infection.

    If blood is seen in the area, you may need emergency surgery.

  • Risks

    Risks include puncturing the uterine or bowel wall.

  • Considerations

    You may need someone to take you home if you were given a sedative.

Related Information

  VaginaEctopic pregnancy...Ovarian cysts    

References

Braen GR, Pierce DL. Culdocentesis. In: Roberts JR, Hedges JR, eds. Clinical Procedures in Emergency Medicine. 5th ed. Philadelphia, Pa: Saunders Elsevier; 2009:chap 57.

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Review Date: 2/26/2012  

Reviewed By: Linda J. Vorvick, MD, Medical Director and Director of Didactic Curriculum, MEDEX Northwest Division of Physician Assistant Studies, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington. Susan Storck, MD, FACOG, Chief, Eastside Department of Obstetrics and Gynecology, Group Health Cooperative of Puget Sound, Bellevue, Washington; Clinical Teaching Faculty, Department of Obstetrics and Gynecology, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

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