Direct comparison
Endocervical Brush vs Cytobrush: Same Device?
Endocervical brush vs cytobrush: the names refer to one device type. FDA codes, and Cochrane data on brush plus spatula versus spatula alone.
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How do Endocervical brush (Cytobrush), Cervical spatula (Ayre or extended-tip) compare side by side?
The table below compares Endocervical brush (Cytobrush), Cervical spatula (Ayre or extended-tip) across 10 procurement-relevant dimensions, from what the name means through source.
Side-by-side comparison
| Dimension | Endocervical brush (Cytobrush) | Cervical spatula (Ayre or extended-tip) |
|---|---|---|
| What the name means | "Cytobrush" is a trade name. The FDA 510(k) database lists CYTOBRUSH products from 1987 to 1989, including K890706 (Laboratoire CCD, decided 1989-04-25). The generic device is an endocervical brush. | A cytological cervical spatula is defined in 21 CFR 884.4530 as "a blunt instrument used to scrape and remove cytological material from the surface of the cervix or vagina." The Ayre spatula and the extended-tip spatula are two designs. |
| FDA product code and class | The Cytobrush 510(k)s above (K890706, K871552, K870398) sit under product code HHT, Class 2. | HHT is "Spatula, Cervical, Cytological": Class 2, regulation 21 CFR 884.4530. A cytology kit has its own code, OKY (Class 2, 884.4530), treated as a convenience kit under FDA's 1997 interim guidance. |
| Look-alike devices that are not this one | The endometrial brush (code HFE, 21 CFR 884.1100) samples the uterine lining and is labeled only to evaluate the endometrium. The endoscopic cytology brush (code FDX, 21 CFR 876.1500) is a different device again. | Not applicable: neither HFE nor FDX is a cervical spatula. |
| Endocervical cells collected: used together vs spatula alone | Cochrane review CD001036: using a spatula with the cytobrush was more effective than spatula alone at collecting endocervical cells (odds ratio 3.33, 95% CI 3.05 to 3.63). | Spatula alone collected fewer endocervical cells in the same comparison. Adequate smear rate favored the spatula-plus-brush combination (odds ratio 1.51, 95% CI 1.19 to 1.92). |
| Ayre vs extended-tip spatula | Cochrane: the most effective combination appears to be the cytobrush with an extended-tip spatula. | Cochrane: the Ayre spatula was less effective than extended-tip spatulas for endocervical cells (8 trials, odds ratio 2.25, 95% CI 2.06 to 2.44). Extended-tip was better at detecting dyskaryosis (7 trials, odds ratio 1.21, 95% CI 1.10 to 1.33). |
| Versus other collection devices | American Family Physician (2004): cotton swabs yield far fewer endocervical cells than brushes. Cervical broom devices are thought to perform similarly to an endocervical brush with an extended-tip spatula. | The same article names the extended-tip spatula plus endocervical brush combination as the most effective method. |
| Newer comparison | A 2023 study of 756 Pap tests (Womens Health, PubMed 37119034) found 93.8% satisfactory with the Papette brush against 93.0% with spatula plus cytobrush, and judged the brush "not inferior." | In that study the spatula-plus-cytobrush arm was the comparator. |
| How far the evidence reaches | The Cochrane review is marked no longer appropriate for update because liquid-based cytology has superseded smear technology, so its odds ratios describe the conventional-smear era. | Same scope: conventional smear evidence, 36 trials plus 6 observational comparative studies. |
| Which to pick (what the sources say) | Brush and Cytobrush are the same kind of device, so there is nothing to choose between the names. The sources favor a brush used together with an extended-tip spatula. | The sources rank a spatula alone below the combination, and the Ayre design below the extended-tip design. |
| Source | openFDA 510(k) and classification APIs (api.fda.gov), read 2026-10-31; 21 CFR 884.4530 and 884.1100 (law.cornell.edu), read 2026-10-31. | Cochrane CD001036 (Martin-Hirsch et al.), AAFP Am Fam Physician 2004;69(7):1661-1663, PubMed 37119034, all read 2026-10-31. |
Common questions
Common questions about Endocervical brush (Cytobrush) vs Cervical spatula (Ayre or extended-tip)
Is a cytobrush the same as an endocervical brush?
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Largely yes. "Cytobrush" is a trade name that appears in FDA 510(k) records from 1987 to 1989; the generic device is an endocervical brush. American Family Physician writes it as "endocervical brush (Cytobrush)".
What is an Ayre spatula?
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It is one design of cytological cervical spatula, a blunt instrument defined in 21 CFR 884.4530 for scraping and removing cytological material from the cervix or vagina. A Cochrane review found it less effective than extended-tip spatulas at collecting endocervical cells.
Is a cytology brush the same as an endocervical brush?
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Not necessarily. FDA product code FDX, the endoscopic cytology brush (21 CFR 876.1500), is a different device, and the endometrial brush (HFE, 21 CFR 884.1100) is labeled only for the endometrium.
Is the cytobrush recommended in pregnancy?
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American Family Physician reports that the manufacturer does not recommend the brush in pregnant women, while noting that no clinical complications have been noted with its use. This is not medical advice; ask a clinician.
