Proctoscope: Types, Uses & Anoscope Differences
A proctoscope is a rigid, hollow tube that lets a clinician look directly at the anal canal and lower rectum. Most tubular proctoscopes are inserted with a smooth-tipped obturator in place. Once the obturator is removed, the open tube becomes a viewing and working channel for inspection, swabs, suction or a small biopsy instrument.
Proctoscopes are not all the same. Some are short and wide, others long and narrow. Some rely on an examination lamp, while others take a fiber-optic light carrier. This guide explains what a proctoscope is used for, the main types and parts, how it differs from an anoscope and a colonoscope, and what to check when selecting proctoscope instruments for a clinic or operating room.
What Is a Proctoscope?
A proctoscope is a medical instrument shaped as a straight, rigid tube, usually with a handle, made in reusable stainless steel or single-use plastic. Because it does not bend, its reach is limited to the anal canal and rectum.
The word describes the device. The examination performed with it is called proctoscopy, and the proctoscope procedure is usually done in a clinic or procedure room. Some clinicians and references also call proctoscopy rigid sigmoidoscopy, especially when a longer rigid scope is used.
Many rigid metal proctoscopes have no camera or lens at all. The clinician looks straight down the bore, with light from an external lamp or headlight, or from a light carrier attached to an illuminated model.
What Is a Proctoscope Used For?
A proctoscope is used for direct visual examination of the anal canal and rectum. Through it, a clinician can look for the source of bleeding, assess hemorrhoids, inspect inflammation or lesions, and pass a small instrument down the tube to take a biopsy.
Common reasons a clinician may perform proctoscopy include:
- Rectal bleeding or blood in the stool
- Assessment of internal hemorrhoids
- Inflammation of the rectum (proctitis)
- Polyps, ulcers or masses in the lower rectum
- Locating the internal opening of an anal fistula
- Follow-up after anorectal surgery, or monitoring after treatment for rectal cancer
It may also be used when ongoing diarrhea, constipation, discharge or anorectal discomfort needs a closer look, sometimes alongside a wider examination of the colon.
The open bore also gives access for swabbing, suction and biopsy forceps. What can be done through it depends on the instrument's diameter and length, and on the clinician's judgment. The instrument enables access; it does not decide the treatment.
Types of Proctoscopes
Proctoscope patterns differ in three ways: working length, bore diameter and how light reaches the field. Names vary between manufacturers and regions, so the listed dimensions tell you more than the pattern name.
Rigid Examination Proctoscopes
A rigid proctoscope for routine examination is a steel tube, usually fitted with an obturator and a side handle. The Kelly pattern is a classic example. The Kelly Proctoscope 22 mm × 140 mm has a 22 mm lumen and a 140 mm working length, enough to inspect beyond the anal canal into the lower rectum.
The Fansler pattern sits at the other end of the range. The Fansler Proctoscope 6 cm has a 6 cm working length, a 3.3 cm diameter and an open-top design. That short, wide profile places it close to anoscope territory and suits examinations focused on the anal canal.
Illuminated or Fiber-Optic Proctoscopes
Illuminated proctoscopes carry light down the tube instead of relying on a lamp over the clinician's shoulder. The light usually comes from a detachable light carrier or a fiber-optic connection that plugs into a separate light source. The Kelly Proctoscope with Light Source pairs a 22 × 90 mm Kelly tube with a detachable illumination assembly. Our range also includes longer fiber-optic proctoscopes at 22 × 280 mm for examinations that need more reach.
Connectors are not universal. Before ordering, confirm that the light carrier or fiber-optic fitting matches the light source and cables already in use.
Operating Proctoscopes
Operating proctoscopes are built for instrument access, not only for viewing. They typically have a wider bore and an open or beveled distal end that exposes tissue for transanal work. The Salvati Operating Proctoscope has a 4 cm lumen, comes in 12 cm and 19 cm lengths, and includes a fiber-optic light connection and a suction channel. It is chosen for procedures where several instruments must work through the scope, not for routine examination.
| Type | Typical design | General purpose | Illumination | Peak Surgicals example |
|---|---|---|---|---|
| Rigid examination | Rigid tube, usually with obturator and handle; some patterns are open-top | Routine anal canal and lower rectal inspection | External lamp or headlight | Kelly 22 × 140 mm; Fansler 6 cm (open-top) |
| Illuminated / fiber-optic | Rigid tube with light carrier or fiber-optic fitting | Examination with light delivered along the tube | Attached carrier linked to a separate light source | Kelly with Light Source 22 × 90 mm |
| Operating | Wide bore, beveled opening, often a suction channel | Transanal procedures that need instrument access | Usually a fiber-optic connection | Salvati 4 cm × 12 cm or 19 cm |
Main Parts and Design Features of a Proctoscope
Every proctoscope instrument is built around the same basic parts, although not every model has all of them.
- Tubular body (lumen): The rigid barrel that keeps tissue out of the viewing path. Its diameter sets how much tissue is visible and which instruments fit; its length sets the reach.
- Obturator: On most tubular patterns, a removable insert with a rounded tip that closes the open end of the tube during insertion. It is withdrawn once the scope is in position.
- Proximal opening or flange: The outer rim the clinician looks through. It also acts as a stop and a positional reference.
- Handle: Usually set to one side, so the hand stays out of the line of sight while the scope is rotated or withdrawn.
- Illumination connection: On lit models, the fitting for a light carrier or fiber-optic cable.
- Working size: Listed as diameter × length, for example 22 × 140 mm. Check whether a listing quotes working length or overall length.
Proctoscope vs Anoscope: What's the Difference?
The main difference between a proctoscope and an anoscope is reach. An anoscope is a short rigid tube for viewing the anal canal and the area just above it. A proctoscope is generally longer and is used to view the rectum as well as the anal canal. Both are rigid and are usually inserted with an obturator, so the clinician typically chooses between them by how far up they need to see.
In practice, the line between anoscope vs proctoscope is blurry. Long anoscopes and short proctoscopes overlap in size, and manufacturers name patterns differently. The CCF Hirschman Anoscope, for example, is listed in lengths from 2½ to 4 inches (about 64 to 102 mm), while the illuminated Kelly proctoscope above is 90 mm. Compare working length and bore, not just the name.
| Feature | Proctoscope | Anoscope |
|---|---|---|
| Primary examination focus | Anal canal and rectum | Anal canal and the lowest part of the rectum |
| Typical design | Longer rigid tube, usually with obturator and side handle | Shorter rigid tube, usually with obturator |
| Lighting | External lamp, or an attached light carrier on illuminated models | Usually an external lamp; lit versions exist |
| Peak Surgicals example | Kelly 22 × 140 mm; Kelly with Light Source 22 × 90 mm | CCF Hirschman, 5/8 or 15/16 inch diameter, 2½ to 4 inches long |
| Selection | Depends on the reach needed and the intended use | Depends on how much of the anal canal must be seen |
A rectal speculum is a third option. Instead of a tube, a bivalve design such as the Pratt Rectal Speculum uses two blades that open after insertion to spread the anal canal, giving wider, adjustable exposure. Specula, retractors and fistula directors are part of our broader range of proctology instruments.
Proctoscopy vs Colonoscopy
Proctoscopy and colonoscopy differ in reach and instrument. A proctoscope is rigid and straight, so it examines only the anal canal and rectum. A colonoscope is a long, flexible scope with a camera that follows the bends of the colon and examines the whole large intestine. A flexible sigmoidoscope sits in between, reaching the lower part of the colon.
Colonoscopy usually needs a full bowel preparation and sedation. Proctoscopy typically needs only rectal preparation and is often done without sedation. A normal proctoscopy does not rule out disease higher in the colon, and a rigid proctoscope is not a substitute when a full colonic examination is indicated.
How to Choose a Proctoscope for Clinical Use
No single diameter or length suits every patient or procedure. The right choice depends on what the clinician needs to see and do, so work through these points with the clinical team before ordering.
- Examination or operative use: Routine inspection usually calls for a standard examination tube. Transanal procedures need an operating pattern with a wider bore and room for instruments.
- Working diameter: A wider bore shows more tissue and fits more instruments. The clinician weighs field of view and access against patient anatomy.
- Working length: Match the reach to the area of interest, whether that is the anal canal, the lower rectum or higher.
- Visualization: Decide whether an external lamp is enough or whether an illuminated model is needed.
- Light-source compatibility: For lit models, check whether the light source itself is included or only the fitting that accepts one, and confirm that the fitting matches existing light sources and cables.
- Obturator and accessories: Check that the obturator is included and fits the tube, and that any light carrier or suction parts are listed. Product photos can show accessories sold separately, so go by the listed contents rather than the picture.
- Reprocessing documentation: For reusable instruments, ask for the manufacturer's cleaning and sterilization instructions before purchase.
- Inspection on receipt: Check the distal rim, bore and handle joint for burrs, dents or misalignment before first use.
- Exact pattern and variant: Several patterns share names, so order by pattern, diameter and length, and confirm the variant before checkout.
If a specification on a product page is unclear, contact our team with the pattern, diameter and length you need, and we will confirm the details before you order.
Cleaning and Reprocessing Considerations
A reusable proctoscope must be reprocessed after every patient. Cleaning, disinfection and sterilization are separate steps. Cleaning removes blood, mucus and other soil; disinfection or sterilization then deals with microorganisms. An instrument that has not been cleaned properly cannot be reliably disinfected or sterilized.
Follow the device manufacturer's validated instructions for use (IFU) and your facility's protocol for every step. That includes how to separate the obturator and any light carrier, which cleaning agents are compatible, and which sterilization method and cycle apply. Light carriers and fiber-optic parts may have different processing limits from the steel body. Inspect the bore, rim and obturator fit before packaging. For general background, see our guide to cleaning medical instruments.
Frequently Asked Questions
Is a proctoscopy painful?
It is usually described as uncomfortable rather than painful. Patients often feel pressure, fullness or cramping, especially if air is introduced to improve the view. Experience varies, so anyone with existing anal pain should raise it with their clinician beforehand.
How long does proctoscopy take?
The examination itself is usually short, often around 5 to 15 minutes. Taking a biopsy or other steps can extend it. The care team will give the expected time for each appointment.
Are you awake for a proctoscopy?
In most cases, yes. Proctoscopy is usually done without general anesthesia, although a mild sedative is sometimes offered. The care team decides based on the patient and the procedure.
What is the prep for a proctoscopy?
The rectum usually needs to be empty, typically by using an enema or laxative before the exam. Patients should tell the care team about all their medicines, especially blood thinners, and change nothing unless advised. The clinic's own instructions always take priority.
Can proctoscopy detect hemorrhoids?
Yes. Internal hemorrhoids sit inside the anal canal and usually cannot be seen from outside unless they prolapse, so proctoscopy or anoscopy is a standard way to see and assess them.
Can proctoscopy identify anal fissures?
Sometimes. Many anal fissures are visible on gentle external examination, and inserting a scope past a painful fissure can be very uncomfortable, so clinicians may postpone instrument examination. When it is done, it can help rule out other causes of symptoms.
Do all proctoscopes have a light source?
No. Many rigid steel proctoscopes have no built-in light and are used with an examination lamp or headlight. Illuminated models take a light carrier or fiber-optic cable connected to a separate light source.
Explore Proctoscope Instruments at Peak Surgicals
Choosing a proctoscope comes down to three questions: how far the clinician needs to see, whether instruments must pass through the tube, and how the field will be lit. Our proctoscope collection brings together Kelly, Fansler, illuminated and Salvati operating patterns alongside anoscopes and rectal specula, with sizes listed on each product page. Peak Surgicals manufactures its instruments in Sialkot, Pakistan, and inspects them before dispatch. Our reusable stainless-steel instruments are supplied non-sterile and must be reprocessed under your facility's validated protocol before first use.
Browse Proctoscope Instruments
This article is general educational information about instruments and examinations. It is not clinical advice, a procedure protocol or a substitute for the manufacturer's instructions for use.