Nursing care
Ankylosing Spondylitis nursing care: what to assess and what to do first
Written and reviewed by Dana Whitfield, RN, MSN · 4 min read · Updated September 2026
Short answer
Ankylosing spondylitis is a chronic inflammatory arthritis of the spine and sacroiliac joints, causing morning stiffness that improves with activity, most often in young men. Nursing priorities are posture maintenance and breathing exercises to prevent the spine from fusing in a flexed position. NSAIDs and biologic agents such as TNF inhibitors control inflammation.
The pathophysiology in one pass
Ankylosing spondylitis is a chronic inflammatory arthropathy targeting the sacroiliac joints and the axial spine, strongly associated with the HLA-B27 gene. Inflammation at the entheses, where ligaments and tendons attach to bone, is the hallmark rather than synovial joint inflammation seen in rheumatoid arthritis.
Repeated inflammation triggers new bone formation as the body attempts to heal, and over years this ossifies the spinal ligaments and intervertebral discs. The vertebrae progressively fuse, producing the classic bamboo spine appearance on imaging, and once fusion occurs it is irreversible, which is why early posture-preserving intervention matters more than in most rheumatologic conditions.
Assessment findings that matter
The defining pattern is low back and hip pain with morning stiffness lasting more than 30 minutes that improves with movement and worsens with rest, the reverse of mechanical back pain. Onset is typically before age 40, and the condition is several times more common in men.
Assess spinal mobility with the Schober test, measure chest expansion, since costovertebral joint involvement restricts thoracic breathing, and check posture for early loss of lumbar lordosis or a stooped, forward-flexed stance. Ask about extra-articular features: anterior uveitis causing eye pain and photophobia, and less commonly aortic valve involvement or inflammatory bowel disease, since these often accompany the axial disease.
What the exam asks about this
NCLEX-style items reward recognising the inflammatory pattern of pain: stiffness that eases with activity and worsens with rest, in a young male, is the classic stem that distinguishes ankylosing spondylitis from degenerative disc disease. HLA-B27 positivity and elevated ESR or CRP support the diagnosis, though HLA-B27 alone is not diagnostic.
Expect the correct nursing priority to be posture and breathing exercises over medication administration when both are offered, since the irreversible complication being prevented is spinal fusion in a flexed, kyphotic position that compromises lung expansion. Questions may also test recognising anterior uveitis, a red, painful eye with photophobia, as an emergency requiring same-day ophthalmology referral.
Nursing interventions in priority order
Teach posture-correcting exercises and encourage sleeping supine on a firm mattress without a pillow under the head, to counter the tendency toward forward flexion. Reinforce that the goal is to fuse straight if fusion occurs at all, not to fuse bent.
Instruct deep breathing and chest expansion exercises daily, since costovertebral involvement restricts thoracic movement and predisposes to reduced lung capacity over time. Encourage regular low-impact exercise such as swimming, which maintains spinal mobility without joint impact. Apply heat before activity to ease morning stiffness, and advise against prolonged immobility, including long periods of sitting, which worsens stiffness rather than relieving it.
Medications and monitoring
NSAIDs are first-line for pain and inflammation; monitor gastrointestinal, renal and cardiovascular effects with long-term use. For patients with inadequate response, TNF-alpha inhibitors such as etanercept or adalimumab, or IL-17 inhibitors such as secukinumab, are used.
Screen for latent tuberculosis and hepatitis B before starting a TNF inhibitor, since these agents suppress immune surveillance and can reactivate latent infection. Monitor for injection site reactions, signs of infection and, with ongoing therapy, periodic bloodwork for cytopenias and liver function.
When to escalate
Escalate immediately for eye pain, redness or photophobia, since anterior uveitis is a recognised complication that can threaten vision if not treated promptly by ophthalmology. This is a same-day referral, not a routine follow-up.
Refer for reassessment if spinal mobility declines despite adherence to exercise and medication, or if chest expansion falls significantly, since this signals progressing fusion and restrictive respiratory compromise. New cardiac symptoms warrant evaluation for aortic valve involvement, a recognised though less common extra-articular manifestation.
The next step on this is the same as on everything else here: answer questions and read the rationales. Our med-surg practice questions are the closest set to what this page covers.
One question from the med-surg set
A client with chronic obstructive pulmonary disease has an oxygen saturation of 88% on 2 L/min via nasal cannula and is alert with no distress. What should the nurse do first?
Rationale
In COPD a saturation of 88–92% is the therapeutic target, not an emergency, and this client is alert with no distress. The first action is the independent nursing intervention that is least invasive and most likely to help: sit them up and reassess. Turning the oxygen up to 6 L/min risks blunting the hypoxic drive, and calling rapid response or drawing an ABG escalates ahead of an assessment you have not finished.
Answer: B
Common questions
How is ankylosing spondylitis pain different from a regular back injury?
Ankylosing spondylitis pain is worse with rest and improves with activity, with morning stiffness lasting over 30 minutes. Mechanical back pain from injury behaves the opposite way, worsening with activity and easing with rest. This inflammatory pattern is the key distinguishing feature.
Why do breathing exercises matter in ankylosing spondylitis?
Inflammation at the costovertebral joints restricts rib cage movement over time, reducing chest expansion and lung capacity. Daily deep breathing and chest expansion exercises help preserve respiratory function as the disease progresses, particularly if spinal fusion advances.
What eye symptom should prompt urgent referral in ankylosing spondylitis?
A red, painful eye with photophobia suggests anterior uveitis, a recognised complication of ankylosing spondylitis. It requires same-day ophthalmology referral, since untreated uveitis can progress and threaten vision.
Do all patients with ankylosing spondylitis test positive for HLA-B27?
No. HLA-B27 is present in most but not all patients with ankylosing spondylitis, and many people who carry HLA-B27 never develop the disease. It supports the diagnosis alongside clinical features and imaging but is not diagnostic on its own.
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