Proctoscopy is a diagnostic procedure that allows direct visualization of the rectum and the anal canal. The clinician uses a rigid or semi-rigid instrument called a proctoscope, which is fitted with a light source, to inspect the mucosal lining of the lower gastrointestinal tract. This procedure is commonly performed in outpatient clinics, surgical wards, and specialized gastroenterology units across Nigeria. Unlike a full colonoscopy, a proctoscopy is brief, requires minimal bowel preparation, and focuses exclusively on the final 8 to 15 centimeters of the large bowel. It serves as a primary tool for investigating localized symptoms such as rectal bleeding, pain, or palpable abnormalities without subjecting the patient to a total bowel washout.
Clinicians order proctoscopy to investigate persistent lower gastrointestinal complaints. Common indications include:
While proctoscopy is a safe procedure, certain clinical situations demand caution or complete avoidance. Absolute contraindications include acute fulminant colitis, severe perianal sepsis, and a patient refusing consent. Relative contraindications involve recent anorectal surgery, severe coagulopathies, or massive acute bleeding where visibility is entirely obscured. Nurses play a vital role in risk assessment by reviewing the patient's medical history, checking recent coagulation profiles if biopsies are planned, and identifying bleeding disorders before the doctor begins the examination.
A standard proctoscope consists of a hollow metal or plastic tube, an obturator with a rounded tip to ease insertion without mucosal trauma, and a handle with an integrated or attached light source. Once the instrument is inside the rectum, the obturator is removed, allowing air to enter or a light beam to illuminate the walls for direct viewing. Additional equipment required on the tray includes water-soluble lubricant, cotton-tipped applicators, biopsy forceps, specimen containers, and clean gloves. Nurses must check the light source functionality before the procedure starts to avoid delays during the examination.
Adequate preparation ensures a clear view and reduces patient anxiety. Most proctoscopies require a simple phosphate or saline enema given 30 to 60 minutes before the test to empty the lower rectum. Fasting is generally unnecessary. The nurse explains the steps of the procedure in simple, reassuring language, emphasizing that while the examination may cause a feeling of pressure or a strong urge to defecate, it is not typically painful. Obtaining written or verbal informed consent and confirming that the enema has produced an adequate result are essential nursing duties before bringing the patient to the examination room.
Patient positioning is critical for successful visualization and patient comfort. The standard position is the left lateral (Sims') position, with the knees flexed toward the chest, or occasionally the knee-chest position. The nurse maintains patient privacy by using a drape, exposing only the anal area. During the procedure, the nurse monitors vital signs, observes the patient's facial expression for signs of distress or severe pain, and hands instruments or specimen bottles to the doctor as requested. Maintaining a calm environment helps relax the anal sphincter, making insertion easier.
After the proctoscope is withdrawn, the nurse cleans the perianal area with tissue or wipes to remove any remaining lubricant or discharge. The patient is allowed to rest in the lateral position for a few minutes before slowly sitting up to prevent postural hypotension. The nurse instructs the patient that passing a small amount of blood or feeling mild irritation is normal, especially if a biopsy was taken. Vital signs are checked if sedation was used, though most patients undergo the procedure without any sedation and can resume normal activities immediately.
Complications from proctoscopy are rare but can include mucosal perforation, excessive bleeding, or severe vasovagal reactions. Perforation presents as sudden, severe abdominal pain, abdominal rigidity, and fever. Bleeding can occur from biopsy sites or traumatized hemorrhoids. The nurse must monitor for these red flags during the recovery period. If severe pain, high fever, or heavy rectal bleeding occurs, the nurse immediately notifies the attending doctor and prepares the patient for emergency intervention or surgical review.