Sims Position: Left Lateral Alignment, Dignity & Pressure-Point Safety
On a medical ward, "turn them on their side" often means three different things. Sims position (left lateral with the top leg flexed) opens the perineum for enema administration, supports dignity during bowel care for constipation, and differs from the 30° tilt used in turning and repositioning schedules. This guide shows how nurses achieve Sims safely—without copying supine or Fowler steps—and how it fits your wider patient positioning plan.
Contents
Quick facts
Key takeaway
Sims is a named left-lateral posture for access and comfort—not a vague "roll to the side." Flex the top hip and knee, pillow between legs, keep the neck neutral, and offload the dependent ear and trochanter before any rectal intervention. Chart left lateral (Sims) with supports used so the next nurse does not confuse it with a 30° pressure-relief tilt.
Quick procedure summary
| Item | Detail |
|---|---|
| Procedure name | Sims position (left lateral with top leg flexed) |
| Also known as | Left lateral position; semi-prone position; enema position (terminology varies) |
| Category | Positioning & mobility — therapeutic lateral positioning |
| Clinical purpose | Perineal access for rectal procedures and hygiene; comfort during lateral care; gravity-assisted bowel management when ordered |
| Who performs | Registered nurses, nursing associates; assistive personnel per delegation and competency |
| Typical time | About 5–8 minutes to position with skin check; longer if paired with a rectal procedure |
| Settings | Medical and surgical wards, emergency care, long-term care, community nursing |
What is Sims position?
Sims position places the patient on the left side with the lower arm positioned comfortably forward and the top leg flexed at hip and knee so the right knee approaches the mattress in front of the left leg. The trunk remains mostly lateral; the posture is not full prone. Many teams use it when the perineum or rectum must be reached while the patient remains in bed.
Principles align with Royal Marsden Manual — positioning a patient: side-lying and the Chapter 7 overview on moving and positioning. Proprietary step sequences and illustrations are not reproduced here—follow your licensed manual and local moving-and-handling policy.
Sims vs other side-lying labels
Charting "side-lying" without a modifier creates handoff confusion. Use this bedside map to match the label to the clinical goal.
| Label | Typical goal | Leg posture cue |
|---|---|---|
| Sims (left lateral) | Rectal access, enema, peri hygiene, some examinations | Top leg flexed; bottom leg relatively straight; hips stacked |
| 30° tilt (pressure off-load) | Sacrum off mattress; scheduled pressure injury prevention | Partial roll with pillow behind back—not full Sims flexion |
| 90° true lateral | Occasionally ordered; therapy or imaging context | Full lateral stack; high trochanter load—pad carefully |
| Right lateral | Alternate skin off-loading or specific wound location | Mirror Sims mechanics only when clinically appropriate |
Write left lateral (Sims) with pillow supports—not only "Sims"—so peri procedures, skin checks, and legal records stay aligned.
Peri-care and enema pathway
Sims is the bridge between positioning skill and rectal nursing care. Before enema administration or fecal impaction removal, confirm the indication, consent pathway, and whether left lateral is appropriate for this patient's wounds and spine status.
Institutional protocols may vary for which enema type, volume, and hold time are used; nurses implement the prescribed order and stop if the patient reports severe cramping, bleeding, or syncope.
Indications
- Prescribed rectal medication or enema when left lateral is the taught access position
- Fecal impaction assessment or manual removal when medical orders support lateral access
- Perineal hygiene and skin inspection in immobile patients
- Some rectal temperature measurements when policy specifies lateral placement—see rectal temperature
- Comfort positioning for nausea or excessive oral secretions in selected patients when upright positioning is not tolerated (per team plan)
- Alternate lateral posture in a turning schedule when right side-lying is due and Sims mechanics are not required
Cautions and when to pause
- Uncleared spinal precautions or recent spinal surgery—may require log roll instead of routine lateral flexion
- Hip replacement or femur fracture with weight-bearing or rotation limits
- Right hip or right lateral surgical wounds that lateral flexion would compress
- Suspected acute abdomen or bowel obstruction where rectal stimulation is contraindicated
- Severe respiratory distress or hypoxia that worsens in lateral posture—reassess airway first
- Patient refusal—offer alternatives and document
Geriatric patients may need slower moves, pain control, and hearing aids in place before explanation. Paediatric Sims mechanics require age-specific protocols not detailed here.
Equipment
Preparation
Step-by-step procedure
Confirm left lateral is appropriate
Read spinal, hip, and wound orders. If right lateral is required for wound location, do not default to Sims without a clinical reason.
Roll toward you in one coordinated motion
With adequate staff, use a slide sheet to bring the patient onto the left side. Avoid pulling the shoulder or dragging the sacrum across linen.
Place limbs in Sims alignment
Lower arm forward with elbow bent; top leg flexed at hip and knee; bottom leg relatively straight. Keep shoulders and hips stacked—not rotated into prone.
Support head, neck, and between knees
Pillow under head maintaining neutral neck; pillow between flexed knees; small pillow or pad at dependent shoulder and ear as needed to reduce pressure.
Drape for dignity and access
Fold gown to expose only the perineal field required. Maintain warmth and minimize exposure time.
Proceed with ordered care or maintain posture
Complete rectal procedure per protocol, or leave in Sims for the ordered duration while monitoring breathing and skin.
Return to safe posture and re-check skin
After care, reposition per pressure plan (often supine or 30° tilt), re-route tubes, and inspect dependent ear, shoulder, and trochanter.
Lateral pressure map
Load shifts to the dependent side in Sims. Pad before duration, not after erythema appears.
| Body area | Risk in Sims | Nursing mitigation |
|---|---|---|
| Ear and temple | Shear on mattress if head unsupported | Pillow under head; reposition if patient reports ear pain |
| Acromion / shoulder | Direct lateral pressure | Small pad behind thorax; avoid hunching the neck |
| Trochanter | High load in 90° lateral; still significant in Sims | Ensure flexed top leg does not twist the pelvis; alternate sides per schedule |
| Lateral malleolus | Contact between ankles if knees unsupported | Pillow between knees; float heels if policy allows after return to supine |
| Perineal skin | Moisture-associated damage with incontinence | Barrier cream per policy; link to skin assessment |
Monitoring and escalation
| Finding | Possible concern | Nursing action |
|---|---|---|
| New non-blanching erythema on dependent shoulder or ear | Developing pressure injury | Off-load; notify tissue viability; adjust future positions |
| Rectal bleeding after procedure | Mucosal trauma, fissure, higher GI source | Stop stimulation; notify clinician; monitor observations |
| Severe abdominal cramping or distension during enema | Obstruction, perforation risk | Stop instillation; urgent medical review |
| Increased breathlessness in lateral posture | Airway pooling, pulmonary congestion | Consider upright alternative if ordered; assess respiration; escalate |
| New back pain after roll | Spinal irritation or injury | Stop movement; maintain safety; medical review |
Documentation
"21/05/2026 09:40 — Positioned left lateral (Sims) with pillow between knees and head supported; peri area draped. Prescribed enema administered per protocol; moderate return on commode; no rectal bleeding. Dependent ear and trochanter intact. Patient tolerated; repositioned to 30° right tilt per pressure chart. Next turn due 11:40."
Record supports, procedure linkage, skin findings, and tolerance. Follow unit documentation standards for intimate care.
Clinical pearls
- Warm the room and explain each touch before lateral exposure—anxiety tightens the abdomen and makes enemas harder to tolerate.
- If the top leg is not flexed, you likely have generic side-lying, not Sims—perineal access and charting accuracy both suffer.
- Bundle positioning with linen change to reduce total handling when safe.
- After Sims for bowel care, return to the pressure-care position on schedule—do not leave patients lateral all shift without a skin rationale.
Patient communication
Use plain language: you will lie on your left side with your top knee bent toward your chest so care can be given safely behind a drape. Offer a chaperone, same-gender clinician when requested and feasible, and pause for pain or dizziness. Teach capable patients to hold the bed rail during a counted roll. Families may provide comfort items but should not perform rectal procedures unless trained and delegated.
NCLEX practice questions
Before rectal care on a confused older adult, rehearse NCLEX-style clinical judgment practice for Sims positioning: priority action before enema, select-all-that-apply cues that define true left lateral Sims, post-procedure skin and bowel trends, and matrix escalation when abdomen or spine status changes (recognise → analyse → prioritise → act → evaluate outcomes).
Unfolding case — medical ward. Mr. Hassan, 81, has chronic constipation and overnight incontinence. A soap enema is due at 09:00. He is alert but intermittently confused. Sacral skin is intact with moisture-associated erythema. No spine precautions on chart; hip fracture repair was 18 months ago with full weight-bearing cleared. You prepare for lateral access.
Answer key & rationale
Frequently asked questions
Is Sims position the same as left side-lying for pressure care?
No. Pressure off-loading often uses a 30° tilt with the sacrum free of the mattress. Sims adds top-leg flexion for perineal access and is charted distinctly.
Why is left lateral preferred for many enemas?
Teaching tradition and gravity toward the splenic flexure are commonly cited; follow your institution's training and patient-specific orders. Right lateral may be appropriate when wounds or precautions dictate.
Can unconscious patients be placed in Sims?
Only with airway and spinal precautions addressed. Unconscious patients may need alternative positions per RMM guidance for patients with artificial airways and local policy.
How long should a patient stay in Sims?
Duration depends on the procedure and tolerance. After rectal care, return to the ordered pressure-relief or respiratory position—avoid prolonged lateral loading without skin checks.
Is Sims position painful?
It should be tolerable with slow movement, pillow supports, and analgesia when indicated. Sharp hip, back, or abdominal pain warrants stopping and reassessment.
What should nursing documentation include?
Time, left lateral (Sims) with supports listed, linked procedure if any, dependent-side skin findings, patient tolerance, and next planned position or turn.
References
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Royal Marsden Manual — Positioning a patient: side-lying (Procedure 7.2; Sims / left lateral principles).https://www.rmmonline.co.uk/manual/c07-fea-0005
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The Royal Marsden Manual of Clinical Nursing Procedures — Chapter 7: Moving and positioning (overview).https://www.rmmonline.co.uk/manual/c07-sec-0004
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Royal Marsden Manual — Moving and positioning: general principles.https://www.rmmonline.co.uk/manual/c07-sec-0005
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Royal Marsden Manual of Clinical Nursing Procedures — Procedures (RMM Online) (publisher procedure library hub).https://www.rmmonline.co.uk/contents/procedures
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NICE — Pressure ulcers: prevention and management (NG179).https://www.nice.org.uk/guidance/ng179
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NHS — Pressure ulcers (pressure sores).https://www.nhs.uk/conditions/pressure-sores/
Editorial standards & medical review
About the author: Sid A. Abdala Balal, RN, writes evidence-based nursing education focused on practical bedside skills, patient safety, and clinical decision support for nurses.
Medical review: This guide is reviewed by Dr. Adam Sayedi, MD, for clinical accuracy, clarity, and alignment with current nursing positioning standards for sims position.
Policies: Medical Review Process · Editorial Policy · Correction Policy