Orcellex® Brush Versus Cervex-Brush® on Vault Smear Adequacy in Patients Treated With Radiotherapy for Cervical Cancer

NCT ID: NCT04461574

Last Updated: 2021-03-17

Basic Information

• Recruitment Status: UNKNOWN
• Clinical Phase: NA
• Total Enrollment: 160 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2020-07-01
• Study Completion Date: 2022-06-30

Brief Summary

Vaginal vault cytology is commonly used for follow-up surveillance in patients treated for cervical cancer. It is known that the smear inadequacy rate is high, especially in patients post-radiotherapy at 10%. The current practice is to use Cervex-Brush®, which was designed for cervical smear taking. Cervix will shrink into a dimple with a flat vaginal vault and vagina may be stenotic after radiotherapy, rendering the use of the conventional sampling device difficult. Orcellex® Brush was designed to collect cells from oral mucosa, with high patient satisfaction and low smear inadequacy of 1% in one study. As both the vaginal vault mucosa and oral mucosa are flat surface lined with stratified squamous epithelium, the use of Orcellex® Brush in vaginal vault smear appeared applicable. It has a smaller head with a flat surface of hair, which might better fit the flat vault surface and narrow vaginal canal. It is postulated that the Orcellex® Brush helps in improving vaginal vault smear adequacy rate in patients after radiotherapy treatment for cervical cancer.

Detailed Description

Patients with cervical cancer treated with primary irradiation will be recruited at their routine post-treatment surveillance follow-up in the out-patient clinic, in the order of their appointment time. Study procedure will be explained and written informed consent is obtained from each subject at the visit. Systemic and vaginal examination will be carried out as usual. Subjects will receive vaginal vault smear by both Cervex-Brush® and Orcellex® Brush during the same speculum examination. The order of using smear sampling devices will be randomized. Randomization will be carried out according to computer-generated random numbers, allocated by sequentially numbered, sealed opaque envelopes. Subjects will be randomized into two groups: using Cervex-Brush® first followed by Orcellex® Brush, or vice versa. The procedure of smear taking will be carried out by four trained clinicians who are independent of the study. The method of smear taking will be standardized for both Cervex-Brush® and Orcellex® Brush. The vaginal vault will be swept horizontally by the brush and the cervical dimple, if seen, will be rotated five times by the brush. Each sampling device will be shaken vigorously in separate Thinprep specimen containers, which is labelled as smear A for Cervex-Brush® and smear B for Orcellex® Brush.

The subjects are unaware of the sequence of the sampling device used, as they cannot see the procedure of smear taking during examination. The patient will be asked about the pain score during each smear taking, by using the visual analog scale. Any vaginal bleeding will be recorded.

The specimen will be sent to the laboratory and will be processed by the ThinPrep method. The cytopathologist is unaware as to which device is used for that particular specimen and the slide prepared from it. One pathologist will be responsible in screening all the vault smears involved in this study. Adequacy of vault smear sample was defined by the Bethesda System as a minimum of 2000 well-visualized and well-preserved squamous cells.

Patients will be arranged subsequent follow-up visits at appropriate time interval according to the department protocol. Patients with inadequate smear result by both sampling devices will be called back early within 8 weeks for repeat smear using the conventional Cervex-Brush®.

Patients with cervical cancer in the department will have surveillance follow-ups at variable intervals from 3 months to 12 months, depending on the time interval from previous treatment and patients' symptoms. Some patients may have repeated smears during the study period. As the result of previous smear will have no impact on the adequacy rate of subsequent smear, patients can be recruited for smear taking more than once in the study. Hence the actual number of patients recruited in the study would be less than the calculated sample size of 160.

Conditions

Cervical Cancer

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: CROSSOVER
• Primary Study Purpose: DIAGNOSTIC
• Blinding Strategy: SINGLE

Study Groups

Cervex Brush

Group Type: PLACEBO_COMPARATOR

Orcellex Brush

Intervention Type: DEVICE

Subjects will receive vaginal vault smear using both Orcellex Brush and Cervex Brush at the same follow-up visit, with order of smear taking decided by randomization.

Orcellex Brush

Group Type: ACTIVE_COMPARATOR

Cervex Brush

Intervention Type: DEVICE

Subjects will receive vaginal vault smear using both Orcellex Brush and Cervex Brush at the same follow-up visit, with order of smear taking decided by randomization.

Interventions

Orcellex Brush

Subjects will receive vaginal vault smear using both Orcellex Brush and Cervex Brush at the same follow-up visit, with order of smear taking decided by randomization.

Intervention Type: DEVICE

Cervex Brush

Subjects will receive vaginal vault smear using both Orcellex Brush and Cervex Brush at the same follow-up visit, with order of smear taking decided by randomization.

Intervention Type: DEVICE

Eligibility Criteria

Inclusion Criteria

• Patients with cervical cancer treated with primary radiotherapy
• Patients aged 18 years or older
• Patients requiring vaginal vault cytology for follow-up surveillance

Exclusion Criteria

• Patients who refuse vaginal examination or vaginal vault smear at follow-up.
• Patients who have visible tumour at vaginal vault requiring direct biopsy at speculum examination.
• Patients who cannot understand the study purpose and procedure.
• Patients who cannot read the words written in Chinese or English.

• Minimum Eligible Age: 18 Years
• Eligible Sex: FEMALE
• Accepts Healthy Volunteers: No

Sponsors

Princess Margaret Hospital, Hong Kong

OTHER_GOV

Sponsor Role: lead

Responsible Party

He Mung Yuen

Associate Consultant

Responsibility Role: PRINCIPAL_INVESTIGATOR

Locations

Princess Margaret Hospital

Hong Kong, , Hong Kong

Site Status: RECRUITING

Countries

Hong Kong

Central Contacts

Mung Yuen He, MBBS

Role: CONTACT

hmy703@ha.org.hk

85262403147

Facility Contacts

Mung Yuen He, MBBS

Role: primary

hmy703@ha.org.hk

85262403147

References

So YL, He MY, Hui SK, Yu EL. Clinical trial comparing the use of Orcellex(R) Brush versus Cervex-Brush(R) on vaginal vault smear cytology adequacy rate in patients treated with radiotherapy for cervical cancer. J Gynecol Oncol. 2025 May;36(3):e43. doi: 10.3802/jgo.2025.36.e43. Epub 2024 Oct 22.

Reference Type: DERIVED

PMID: 39453394 (View on PubMed)

Other Identifiers

147-06

Identifier Type: -

Identifier Source: org_study_id