The Weisman-Pederson speculum is a medical instrument used primarily in gynecological exams and procedures. It is a type of bivalve vaginal speculum, designed with narrow, flat blades and a side-opening feature. This design is especially well-suited for patients with narrow or atrophic vaginal canals, such as those who are postmenopausal or nulliparous.

Key Features:

• Blade Design: The blades are narrower and flatter compared to the Graves speculum, which helps reduce discomfort and facilitates easier insertion in patients with less vaginal space.

• Side-Opening Configuration: It is available in left or right side-opening versions. This allows better access for instruments, such as during IUD insertions or procedures involving catheters. It also enables removal over a catheter or other in-place devices.

• Locking Mechanism: The speculum has a screw-lock mechanism that keeps the blades open once inserted, allowing clinicians to work hands-free.

• Size Options:

  • Medium: Approximately 10 cm blade length

  • Large: Around 11.5 cm

  • Extra-Large (Clinton): About 15 cm

  • XXL: Up to 18 cm
    All sizes typically have a blade width of approximately 2.5 cm.

• Blade Angles: Available with either straight blades or 45-degree angled blades (usually for the medium size) to improve visualization and instrument access in certain procedures.

• Material: Made of surgical-grade stainless steel, making it durable, reusable, and autoclavable.

• Optional Non-Conductive Model: For electrosurgical procedures like LEEP or LLETZ, a non-conductive version is available. These models are insulated with a nylon coating and may include a smoke evacuation port to maintain a clear field during cauterization.

Common Uses:

• Routine pelvic examinations

• Pap smears

• Intrauterine device (IUD) placement

• Biopsies and minor gynecological procedures

• Electrosurgical treatments (with insulated version)

The Weisman-Pederson speculum is often preferred in cases where minimal tissue stretching is necessary, and its open-side design makes it especially practical for instrument-heavy procedures.