BOWEL ASSESSMENT
To complete a meaningful bowel assessment, healthcare professionals should have knowledge and understanding of the anatomy and physiology of the gastrointestinal tract. This knowledge must be applied to the individual patient to understand their normal and to start to identify the abnormal. The National Institute for Health and Care Excellence (NICE, 2007) produced evidence-based guidelines several years ago detailing the benefits of a structured approach to assessing any form of bowel dysfunction using appropriate tools, including the Bristol Stool Chart, bowel habit diaries to record the type, consistency and frequency of stool, as well as any evidence of straining, and Rome III classification (Rome, 2006).
Comprehensive bowel assessment should also include diet and fluid habits, relevant medical and pharmacology history, and a physical examination. Physical examination should also include abdominal palpation and rectal examination (NICE, 2007; Gray, 2011).
Visual assessment of the anal and perineal area will identify any obvious signs of prolapse, skin issues, and haemorrhoids. Palpation of the abdomen helps to determine areas of sluggish or absent activity, distension caused potentially by trapped wind or constipation; listening to bowel sounds with a stethoscope is a simple method of determining bowel activity.
DRE is a useful assessment to determine the rectal contents, type/consistency of stool, evidence of constipation, prostate size, anal tone and sensation. In practice, if you are administering rectal medications, a DRE should be performed first to determine the need for the medication, or its effect. However, it may not always be appropriate to perform more than one rectal intervention at the time, so how do you determine the need and balance this against patient compliance and legal implications of your actions or omissions?
Some pertinent questions to ask would be:
- Why do I need to do this procedure?
- What can I do instead?
- What are the implications if I don’t carry out a DRE?
- Is the patient safe — if I omit the procedure, will there be harm?
The ideal position for the patient undergoing a DRE is laying on the left lateral, as this enables easier observation of the anal area and follows the natural anatomical position of the anal canal. In the male patient, a supine position with knees flexed is a useful position to assess the prostate and male genitalia. The position for examination should be safe for both the practitioner and patient and take into account mobility restrictions and comfort.
DRE should only be undertaken with evidence of informed consent, considering the patient’s cognitive understanding of the procedure, and any cultural or religious issues.
Consideration should be given to a number of factors that may cause increased risk/harm when undertaking a DRE:
- Recent radiotherapy to the pelvic area
- Active inflammatory bowel disorders
- Rectal or anal bleeding or pain
- Tissue compromise caused by age or other medical conditions
- History of sexual/physical abuse
- Unconscious patient (Fenton et al, 2019).
Special attention should also be given when dealing with a patient who has a spinal cord injury as the risk of autonomic dysreflexia (AD) is high in some (Faaborg et al, 2014; Rodger, 2016). AD is a potentially life-threatening response seen in people who have a SCI at T6 or higher level of the spinal cord. The body is unable to react to certain stimuli below the level of injury (such as pain, constipation, full bladder). This results in a rapid and significant change in blood pressure and cardiac function, leading in some cases to seizures, brain haemorrhage and fatality. These patients should have a clear and detailed plan in place to manage their bladder and bowel function. There should be clear instructions on how to manage rectal interventions safely and effectively, and often these patients will use a pre-emptive medication such as sublingual glyceryl trinitrate (GTN) or nifedipine. The use of an appropriate anaesthetic lubricant to carry out the DRE procedure can also reduce the risk of AD episodes occurring Faaborg et al, 2014; Rodger, 2016; Fenton et al, 2019).
It is advisable in this group of patients to record a baseline blood pressure (BP) before the rectal intervention and continue to monitor BP and cardiovascular status during the procedure. The rectal procedure should be stopped immediately if there are any sudden changes or signs of discomfort, pain or increased anxiety. However, it is not necessary to routinely monitor BP in patients who rely on a regular rectal intervention to manage their function if there is evidence of an established tolerance to the procedure with no signs of AD (Ness, 2013).