ColonoscopyPhase 4NCT00930462
Evaluation of the Use of Cap in Improving the Performance of Colonoscopy
A Phase 4 study testing Cap (Olympus Medical Systems: D-201-15004, D-201-14304 and D-201-12704) in people with Colonoscopy, run by Royal Prince Alfred Hospital, Sydney, Australia at 1 site in Australia.
Trial summary
The aim of this study is to compare the colonoscopy success rate, cecal time and polyp detection rate between cap-fitted colonoscopy and conventional colonoscopy. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Colonoscopy
- What is being tested?
- Cap (Olympus Medical Systems: D-201-15004, D-201-14304 and D-201-12704)
- Type of treatment
- Medical device
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 400 participants
- Where
- 1 siteAustralia
- Study dates
- Mar 2008to Feb 2009
- Phase
- Phase 4
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- All colonoscopy patients referred for colonoscopy at Royal Prince Alfred Hospital.
Who cannot join
- Prior colonic resection
- Pregnancy.
- Severe co-morbidities.
- Tertiary referral for endo-mucosal resection.
- Acute surgical conditions such as severe colitis, toxic megacolon, ischemic colitis, acute gastrointestinal bleeding.
Trial locations and contacts
1 site in 1 country.
About this study
Official title: A Prospective Randomised Controlled Trial Comparing Cap-Assisted Colonoscopy Versus Standard Colonoscopy
The aim of this study is to compare the colonoscopy success rate, cecal time and polyp detection rate between cap-fitted colonoscopy and conventional colonoscopy.
Read the detailed description
Colonoscopic examination has been used in clinical practice for approximately 40 years. Despite the fact that colonoscopy is widely available and is performed by many experienced colonoscopists there are concerns about the quality of colonoscopy as measured by several technical endpoints such as rate of failed caecal intubation and polyp miss rate. A large population-based study revealed 13.1% of colonoscopies failed to reach the cecum. In addition, one large review of back-to-back colonoscopies showed polyp miss rates of 24% for adenoma.
One potentially promising technique is cap-assisted colonoscopy. A transparent cap (or "hood") is a simple plastic device that can be attached to the tip of a colonoscope before performing the colonoscopy. Several randomized trials from Japan have mixed results regarding improved cecal intubation times and polyp detection rates. A recent large study from Hong Kong showed improved time to cecum but a reduced polyp detection rate. To date there is no large randomized study using the cap in a western population, in whom the colorectal cancer (CRC) incidence is known to be higher. We plan to conduct a randomized controlled trial to investigate the usefulness of cap-assisted colonoscopy in a Western population.
- Conditions
- Colonoscopy
- Being tested
- Cap (Olympus Medical Systems: D-201-15004, D-201-14304 and D-201-12704)
- Keywords
- colonoscopy, cap, hood, cecal intubation time, polyp detection rate, performance
- Medical subject headings
- Anterior polar cataract 2
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Cap (Olympus Medical Systems: D-201-15004, D-201-14304 and D-201-12704)Device
Also called D-201-15004, D-201-14304 and D-201-12704, Olympus Medical Systems, Tokyo, Japan.
Plastic cap fitted on the colonoscope
| Study group | Role | What they receive |
|---|---|---|
| Conventional colonoscopy | No intervention | No cap fitted on the colonoscopes for this group. |
| Cap-assisted colonoscopy | Experimental | Not described Receives: Device: Cap (Olympus Medical Systems: D-201-15004, D-201-14304 and D-201-12704) |
What is being measured
The primary outcome is the main question the study is designed to answer.
Time to cecum
Measured: One month
Secondary outcomes (1)
Polyp detection rate
Measured: One month
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted30 Jun 2009 (estimated)
- Study startMar 2008
- Primary completionFeb 2009
- Study completionFeb 2009
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (5)Papers the sponsor has linked to this study.
- Other trials for ColonoscopyStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 4
- Primary purpose
- Diagnosis
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind
- Who is masked
- Participant
- Enrolment
- 400 participants (actual)
Sponsor and investigators
- Lead sponsor
- Royal Prince Alfred Hospital, Sydney, Australia
- Sponsor type
- University, hospital or other
- Investigators
- Arthur J Kaffes, FRACP, Principal investigator, Royal Prince Alfred Hospital, Sydney
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00930462
- Sponsor's protocol ID
- CAPCOLON
- Other IDs
- X07-0107
- Status last verified
- Jun 2009
- First submitted
- 26 Jun 2009
- Last updated
- 30 Jun 2009
- Results posted
- No
- Data monitoring committee
- No
Publications
Lee YT, Lai LH, Hui AJ, Wong VW, Ching JY, Wong GL, Wu JC, Chan HL, Leung WK, Lau JY, Sung JJ, Chan FK. Efficacy of cap-assisted colonoscopy in comparison with regular colonoscopy: a randomized controlled trial. Am J Gastroenterol. 2009 Jan;104(1):41-6. doi: 10.1038/ajg.2008.56.
PubMed 19098847Kondo S, Yamaji Y, Watabe H, Yamada A, Sugimoto T, Ohta M, Ogura K, Okamoto M, Yoshida H, Kawabe T, Omata M. A randomized controlled trial evaluating the usefulness of a transparent hood attached to the tip of the colonoscope. Am J Gastroenterol. 2007 Jan;102(1):75-81. doi: 10.1111/j.1572-0241.2006.00897.x. Epub 2006 Nov 13.
PubMed 17100978Harada Y, Hirasawa D, Fujita N, Noda Y, Kobayashi G, Ishida K, Yonechi M, Ito K, Suzuki T, Sugawara T, Horaguchi J, Takasawa O, Obana T, Oohira T, Onochi K, Kanno Y, Kuroha M, Iwai W. Impact of a transparent hood on the performance of total colonoscopy: a randomized controlled trial. Gastrointest Endosc. 2009 Mar;69(3 Pt 2):637-44. doi: 10.1016/j.gie.2008.08.029.
PubMed 19251004Shida T, Katsuura Y, Teramoto O, Kaiho M, Takano S, Yoshidome H, Miyazaki M. Transparent hood attached to the colonoscope: does it really work for all types of colonoscopes? Surg Endosc. 2008 Dec;22(12):2654-8. doi: 10.1007/s00464-008-9790-6. Epub 2008 Feb 23.
PubMed 18297353Tee HP, Corte C, Al-Ghamdi H, Prakoso E, Darke J, Chettiar R, Rahman W, Davison S, Griffin SP, Selby WS, Kaffes AJ. Prospective randomized controlled trial evaluating cap-assisted colonoscopy vs standard colonoscopy. World J Gastroenterol. 2010 Aug 21;16(31):3905-10. doi: 10.3748/wjg.v16.i31.3905.
PubMed 20712051
Study at a glance
From the registry record, last updated by the sponsor on 30 Jun 2009. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Prospective Randomised Controlled Trial Comparing Cap-Assisted Colonoscopy Versus Standard Colonoscopy
- ClinicalTrials.gov ID
- NCT00930462
- Acronym / sponsor ID
- CAPCOLON
- Conditions
- Colonoscopy
- Keywords
- colonoscopy, cap, hood, cecal intubation time, polyp detection rate, performance
- Phase
- Phase 4
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 400 participants (actual)
- Lead sponsor
- Royal Prince Alfred Hospital, Sydney, AustraliaUniversity, hospital or other
- Study start
- Mar 2008
- Primary completion
- Feb 2009 (actual)
- Study completion
- Feb 2009 (actual)
- First posted
- 30 Jun 2009 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The aim of this study is to compare the colonoscopy success rate, cecal time and polyp detection rate between cap-fitted colonoscopy and conventional colonoscopy.
Detailed description
Colonoscopic examination has been used in clinical practice for approximately 40 years. Despite the fact that colonoscopy is widely available and is performed by many experienced colonoscopists there are concerns about the quality of colonoscopy as measured by several technical endpoints such as rate of failed caecal intubation and polyp miss rate. A large population-based study revealed 13.1% of colonoscopies failed to reach the cecum. In addition, one large review of back-to-back colonoscopies showed polyp miss rates of 24% for adenoma.
One potentially promising technique is cap-assisted colonoscopy. A transparent cap (or "hood") is a simple plastic device that can be attached to the tip of a colonoscope before performing the colonoscopy. Several randomized trials from Japan have mixed results regarding improved cecal intubation times and polyp detection rates. A recent large study from Hong Kong showed improved time to cecum but a reduced polyp detection rate. To date there is no large randomized study using the cap in a western population, in whom the colorectal cancer (CRC) incidence is known to be higher. We plan to conduct a randomized controlled trial to investigate the usefulness of cap-assisted colonoscopy in a Western population.
Study design
- Primary purpose
- Diagnosis
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind (participant)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Conventional colonoscopy | No intervention | –No cap fitted on the colonoscopes for this group. |
| Cap-assisted colonoscopy | Experimental | Device: Cap (Olympus Medical Systems: D-201-15004, D-201-14304 and D-201-12704) |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (1 listed)
- All colonoscopy patients referred for colonoscopy at Royal Prince Alfred Hospital.
Key exclusion criteria (5 listed)
- Prior colonic resection
- Pregnancy.
- Severe co-morbidities.
- Tertiary referral for endo-mucosal resection.
- Acute surgical conditions such as severe colitis, toxic megacolon, ischemic colitis, acute gastrointestinal bleeding.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Cap (Olympus Medical Systems: D-201-15004, D-201-14304 and D-201-12704)Also: D-201-15004, D-201-14304 and D-201-12704, Olympus Medical Systems, Tokyo, Japan.Plastic cap fitted on the colonoscope | Device | Cap-assisted colonoscopy |
Primary outcome
Time to cecum
Time frame: One month
1 secondary outcome
Polyp detection rate
Time frame: One month
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 30 Jun 2009.
- Results publication: PubMed 19098847Lee YT, Lai LH, Hui AJ, Wong VW, Ching JY, Wong GL, Wu JC, Chan HL, Leung WK, Lau JY, Sung JJ, Chan FK. Efficacy of cap-assisted colonoscopy in comparison with regular colonoscopy: a randomized controlled trial. Am J Gastroenterol. 2009 Jan;104(1):41-6. doi: 10.1038/ajg.2008.56.
- Results publication: PubMed 17100978Kondo S, Yamaji Y, Watabe H, Yamada A, Sugimoto T, Ohta M, Ogura K, Okamoto M, Yoshida H, Kawabe T, Omata M. A randomized controlled trial evaluating the usefulness of a transparent hood attached to the tip of the colonoscope. Am J Gastroenterol. 2007 Jan;102(1):75-81. doi: 10.1111/j.1572-0241.2006.00897.x. Epub 2006 Nov 13.
- Results publication: PubMed 19251004Harada Y, Hirasawa D, Fujita N, Noda Y, Kobayashi G, Ishida K, Yonechi M, Ito K, Suzuki T, Sugawara T, Horaguchi J, Takasawa O, Obana T, Oohira T, Onochi K, Kanno Y, Kuroha M, Iwai W. Impact of a transparent hood on the performance of total colonoscopy: a randomized controlled trial. Gastrointest Endosc. 2009 Mar;69(3 Pt 2):637-44. doi: 10.1016/j.gie.2008.08.029.
- Results publication: PubMed 18297353Shida T, Katsuura Y, Teramoto O, Kaiho M, Takano S, Yoshidome H, Miyazaki M. Transparent hood attached to the colonoscope: does it really work for all types of colonoscopes? Surg Endosc. 2008 Dec;22(12):2654-8. doi: 10.1007/s00464-008-9790-6. Epub 2008 Feb 23.
- Derived from this study: PubMed 20712051Tee HP, Corte C, Al-Ghamdi H, Prakoso E, Darke J, Chettiar R, Rahman W, Davison S, Griffin SP, Selby WS, Kaffes AJ. Prospective randomized controlled trial evaluating cap-assisted colonoscopy vs standard colonoscopy. World J Gastroenterol. 2010 Aug 21;16(31):3905-10. doi: 10.3748/wjg.v16.i31.3905.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Arthur J Kaffes, FRACP principal investigator
Royal Prince Alfred Hospital, Sydney
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 4 study testing Cap (Olympus Medical Systems: D-201-15004, D-201-14304 and D-201-12704) in people with Colonoscopy, run by Royal Prince Alfred Hospital, Sydney, Australia at 1 site in Australia.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 30 Jun 2009. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Australia. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 4 studies take place after a treatment is approved, to learn more about its long-term benefits and risks in everyday use.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Time to cecum (time frame: One month). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT00930462, which also lists 5 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 30 Jun 2009; AzTrials last refreshed its copy on 7 Nov 2026.