Outpatient Hysteroscopy
Purpose and Scope
Outpatient hysteroscopy (OPH) allows direct visualisation of the uterine cavity using miniaturised endoscopic equipment without intravenous sedation or general/regional anaesthesia in a formal theatre. The guideline's central aim is minimising pain and optimising the woman's experience, since instrumentation of the uterus can cause significant pain, anxiety and embarrassment that limit feasibility, safety and diagnostic accuracy.
Indications
- Investigation of abnormal uterine bleeding (including postmenopausal bleeding and heavy menstrual bleeding)
- Assessment of suspected intracavity pathology — endometrial polyps, submucosal fibroids, retained products of conception
- Investigation of reproductive problems — suspected congenital or acquired uterine anomalies, recurrent miscarriage, subfertility work-up
- Targeted endometrial biopsy under direct vision
- Therapeutic procedures — polypectomy, removal of retained intrauterine devices, division of thin intrauterine adhesions
Technique
- Vaginoscopy ("no-touch" technique, without a speculum or tenaculum) should be the standard approach for diagnostic outpatient hysteroscopy, reducing pain compared with the traditional technique.
- A speculum and/or tenaculum should only be used if needed to administer local anaesthesia, achieve cervical dilatation, or manage a technically difficult procedure.
- The smallest-diameter hysteroscope compatible with the required diagnostic/operative task should be used; mini-hysteroscopes with an outer diameter of ≤5 mm are associated with less pain.
- Normal saline is the recommended distension medium, instilled at the lowest pressure that achieves an adequate view of the cavity, to reduce pain and vasovagal episodes.
- For operative procedures (e.g. polypectomy), mechanical tissue-removal systems are preferred over bipolar electrosurgical resection, as they are associated with shorter procedure times, less pain and better tissue yield for histology.
Analgesia and Patient Experience
- Women should be advised to take a standard-dose NSAID approximately one hour before their appointment.
- Local anaesthesia is not required routinely when a vaginoscopic approach is used, but should be considered/offered when a speculum or tenaculum is needed, or when instruments ≥5 mm are used (e.g. intracervical or paracervical block).
- Conscious sedation should not be used routinely in the outpatient setting.
- Continuous verbal reassurance ("vocal local") is recommended throughout, and women must be told clearly that the procedure can be stopped at any point if they experience excessive pain or distress.
- Cervical priming agents are not recommended routinely before outpatient hysteroscopy.
- Clear, written pre-procedure information and fully informed consent — including realistic expectations of pain — are essential; a pathway to convert to a general-anaesthetic setting should be available for women unable to tolerate the outpatient procedure.
Complications
Recognised complications include uterine perforation, pelvic infection, vasovagal reactions, cervical shock, and failed procedure due to pain, cervical stenosis or excessive bleeding obscuring the view. Fluid overload is rare given the low distension pressures used in outpatient settings but remains a theoretical risk with prolonged procedures.
High-Yield Exam Points
- Vaginoscopy (no speculum/tenaculum) is the default technique — use a speculum only if LA or cervical dilatation is needed
- Routine local anaesthesia is not indicated with vaginoscopy; routine conscious sedation is not recommended
- Standard-dose NSAIDs pre-procedure are recommended; smaller hysteroscope diameter reduces pain
- Saline distension at the lowest pressure achieving an adequate view
- Mechanical morcellation is preferred over bipolar electrosurgery for outpatient polypectomy
- The woman must always be able to stop the procedure if in pain — informed consent is central to the guideline's ethos
- This is the 2nd edition (2024), replacing the 2011 1st edition
Source: RCOG Green-top Guideline No. 59 (2nd edition, published BJOG 19 August 2024 (RCOG site listing updated 9 September 2024) — supersedes the 1st edition (March 2011))
Read the original on rcog.org.uk
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