Sound (medical instrument)
In medicine, sounds are instruments for probing and dilating passages within the body, the best-known examples of which are urethral sounds and uterine sounds. Some people enjoy using them for urethral play.
Urethral sounds are designed to be inserted into the male or female urethra, for the purpose of stretching or unblocking a stricture. There are a number of different types of urethral sounds:
- Bakes sounds, also known as rosebud or bullet sounds, have a long thin metal rod with a bulbous bud on the end.
- Dittel sounds have a flat end and a rounded end.
- Henk sounds have a more pronounced curve at the ends, as well as a metal rib on each end.
- Pratt sounds are longer urethral dilators (double ended ones are usually almost a foot long) with rounded and slightly bent ends.
- Van Buren sounds have a very pronounced tips and applicators
These sounds or dilators are intended for probing a woman's uterus through the cervix, to measure the length and direction of the cervical canal and uterus, to determine the level of dilation, or to induce further dilation.
Uterine sounding may be performed prior to embryo transfer to determine the uterine depth and how easily an embryo transfer catheter can be passed through the cervix. In this case, it may also be called a trial transfer. It is performed prior to insertion of an intrauterine device (IUD) in order to measure the length and direction of the cervical canal and uterus. This reduces the risk of perforating the uterus with the IUD. This may occur when the IUD is inserted too deeply or at the wrong angle.
Different types of Uterine sounds include the following:
- Hegar dilators have two rounded ends, are fairly short, and are mildly curved in shape.
- Sims sounds have a flat end and a rounded end.
- resolve.org > The Medical Aspects Of Egg Donation by Owen K. Davis, MD. Retrieved on Feb 14, 2010
- About.com > What To Expect During an IUD Insertion (ParaGard IUD or Mirena IUD) By Dawn Stacey M.Ed. Updated December 22, 2009
- maqweb.org > INSTRUCTIONS FOR SOUNDING THE UTERUS By United States Agency for International Development (USAID)