gynaecology Gynaecology or gynecology (see American and British English spelling differences) is the area of medicine concerned with conditions affecting the female reproductive system. It is often paired with the field of obstetrics, which focuses on pre ...

, Cusco's self-retaining bivalved speculum is a kind of

speculum The term speculum, Latin for "mirror", and its plural specula, may refer to: * ''Speculum'' (journal), a journal of medieval studies published by the Medieval Academy of America * Speculum (medical), a medical tool used for examining body cavities ...

used for

vaginal In mammals and other animals, the vagina (: vaginas or vaginae) is the elastic, muscular reproductive organ of the female genital tract. In humans, it extends from the vulval vestibule to the cervix (neck of the uterus). The vaginal introit ...

and cervical examinations. It has a jaw that opens up like a duck bill. The instrument was named after French surgeon Édouard-Gabriel Cusco (1819–1894). It comes in three models: side screw, centre screw, and special narrow virgin size. Cusco's speculum is usually long and broad. However, smaller and larger sizes are available. Cusco's speculum is used for introducing an intrauterine contraceptive device, taking a

Pap smear The Papanicolaou test (abbreviated as Pap test, also known as Pap smear (AE), cervical smear (BE), cervical screening (BE), or smear test (BE)) is a method of cervical screening used to detect potentially precancerous and cancerous processes in ...

cauterization Cauterization (or cauterisation, or cautery) is a medical practice or technique of burning a part of a body to remove or close off a part of it. It destroys some tissue in an attempt to mitigate bleeding and damage, remove an undesired growth, o ...

of vaginal erosion, and colposcopic examination. It is preferred in

cryosurgery Cryosurgery (with ''cryo'' from the Ancient Greek ) is the use of extreme cold in surgery to destroy abnormal or diseased tissue; thus, it is the surgical application of cryoablation. Cryosurgery has been historically used to treat a number o ...

because it protects the anterior and posterior vaginal wall. The advantage of Cusco's speculum is that it is self-retaining. Therefore, an assistant's help is not needed to keep the speculum in place. It also acts as the vaginal wall retractor. However, it reduces the space in the vaginal cavity and therefore is not a preferred instrument for

vaginal surgery In mammals and other animals, the vagina (: vaginas or vaginae) is the elastic, muscular reproductive organ of the female genital tract. In humans, it extends from the vulval vestibule to the cervix (neck of the uterus). The vaginal introit ...

. Because it covers most of the vaginal wall, small

lesions A lesion is any damage or abnormal change in the tissue of an organism, usually caused by injury or diseases. The term ''Lesion'' is derived from the Latin meaning "injury". Lesions may occur in both plants and animals. Types There is no de ...

on the vaginal wall may be masked by the blades of the device.

References

{{reflist Surgical instruments Gynaecology