Common Causes of Unplanned Returns After Total Hip Replacement
- Hip dislocation risk and precaution-related confusion are among the most significant sources of post-operative anxiety and unplanned contacts after total hip arthroplasty. The specific precautions required depend on the surgical approach: posterior approach THA typically requires hip flexion restrictions (no bending the hip past 90 degrees), adduction restrictions (no crossing the legs), and internal rotation restrictions (no turning the foot inward). Anterior approach THA has a different precaution profile. Discharge instructions that do not specify the approach used and the precautions tied to that approach leave patients uncertain about which movements are prohibited.
- DVT and pulmonary embolism risk after total hip arthroplasty is well-established and generates a portion of unplanned emergency contacts. The AAOS clinical practice guidelines on VTE prophylaxis after THA support pharmacologic prophylaxis for most patients. Discharge instructions must name the specific prophylaxis agent, dose, duration, and administration schedule. Instructions should describe DVT warning signs (calf or thigh pain, leg swelling, redness or warmth along the leg) and distinguish them from expected post-operative swelling. Pulmonary embolism symptoms (chest pain, shortness of breath, rapid heart rate) should be identified as requiring 911 activation.
- Wound drainage concerns in the first 72 hours after THA generate a predictable volume of avoidable contacts. Patients who receive no description of expected drainage will call or present to the ED at the first sign of wound moisture. Instructions should describe the expected color, volume, and duration of drainage after posterior and anterior approach THA, specify the threshold for evaluation (soaking through two dressings within one hour, drainage that becomes cloudy, malodorous, or persists past five days), and provide dressing change technique.
- Assistive device questions and weight-bearing status uncertainty drive a substantial number of post-discharge calls after total hip replacement. Instructions should state the exact weight-bearing status (weight-bearing as tolerated, partial weight-bearing, non-weight-bearing), the assistive device required (walker, cane), and the criteria for advancement to a less restrictive device. Patients who receive walker instructions but not cane advancement criteria will call when they feel ready to transition and cannot find written guidance.
- Medication questions are a high-volume contact driver after total hip arthroplasty. Multimodal pain regimens that include scheduled and as-needed medications require clear written instructions specifying each medication by name, dose, frequency, maximum daily dose, and the expected sequence of weaning from stronger to weaker agents. Patients who cannot interpret a prescription label without additional context will call for clarification.
Discharge Instruction Content for Total Hip Arthroplasty
- Total hip arthroplasty discharge instructions must include: the specific surgical approach used (posterior, anterior, lateral) and the precautions tied to that approach; weight-bearing status and assistive device required; home exercise program with exercise names, frequency, and repetitions; wound care steps with dressing change schedule; DVT prophylaxis medication name, dose, duration, and schedule; all pain medications with names, doses, schedules, and weaning guidance; the follow-up appointment date, time, and purpose; and the specific symptoms requiring emergency evaluation versus calling the practice during business hours.
- Hip precaution instructions for posterior approach THA must be specific and illustrated when possible. The instruction that patients should not flex the hip past 90 degrees must be translated into daily activities: do not lean forward to tie shoes (use a long-handled shoe horn), do not sit in low chairs or on low toilets (use a raised toilet seat and chair raisers), do not bend forward to pick up items from the floor (use a grabber tool). Abstract precaution statements without activity-level examples are frequently misunderstood.
- Driving restriction instructions after total hip arthroplasty must specify the minimum duration of the restriction and the criteria for resumption. For right-hip THA, most surgeons restrict driving for 4 to 8 weeks. For left-hip THA with an automatic transmission vehicle, restrictions vary by surgeon and approach. Instructions should state: no driving on the operative side for the specified period, no driving while taking opioid medications regardless of which hip was operated on, and the criteria the patient must meet before resuming driving (confirmation from surgeon, full weight-bearing without assistive device, ability to perform emergency braking).
- Equipment setup instructions must address the specific equipment needed before the patient goes home: raised toilet seat, shower bench or tub transfer bench, long-handled grabber and shoe horn, and walker or cane. Instructions should specify the required height for chairs and toilets and where each piece of equipment can be obtained. Patients who return home to an unprepared environment face higher dislocation and fall risk in the first days after THA.
- Return-to-activity timelines after total hip arthroplasty should be stated in the discharge instructions for common activities: walking outside (immediate, with assistive device), driving (per surgeon criteria), returning to desk work (typically 4 to 6 weeks), returning to light physical work (8 to 12 weeks), and implant longevity restrictions (no high-impact activities, no contact sports). Patients benefit from seeing the full anticipated timeline in writing rather than receiving information piecemeal at each follow-up visit.
CJR Model Documentation and CMS Quality Reporting
- The CMS Comprehensive Care for Joint Replacement (CJR) model holds participating hospitals financially accountable for costs and quality during the 90-day episode following a qualifying hip or knee replacement. Under CJR, a hospital readmission or unplanned ED visit within 90 days increases the episode cost and affects the facility's reconciliation payment. For total hip arthroplasty, unplanned returns for hip dislocation and wound complications represent a primary quality improvement target.
- CJR quality measures include the HCAHPS survey questions on discharge instruction comprehensibility and receipt of written instructions. Patients who report not receiving written discharge instructions or not understanding them contribute to lower HCAHPS scores, which reduce the quality adjustment in CJR reconciliation. Documentation of the specific written instructions provided and patient acknowledgment supports performance under HCAHPS measures.
- MIPS Quality Measures 020 and 021 (perioperative antibiotic timing and selection) apply to total hip arthroplasty cases. First-generation cephalosporins are the recommended prophylaxis agent per ASHP, IDSA, SIS, and SHEA consensus guidelines for clean orthopedic procedures. Documentation for each THA case should record the antibiotic ordered, dose, time of administration relative to incision, and the clinical rationale if a non-first-line agent was selected.
- Patient-reported outcome measures for total hip arthroplasty include the Hip Disability and Osteoarthritis Outcome Score (HOOS) and the Hip Replacement Survey (HRS). Collection of baseline and post-operative HOOS scores supports MIPS improvement activity credit and qualified registry reporting. A defined process for administering, collecting, and storing PRO instruments in the medical record is required before reporting these scores in quality programs.
QAPI Tracking for Hip Replacement Outcomes
- Orthopedic practices should track unplanned post-operative contacts after total hip arthroplasty as a formal QAPI indicator. Categorizing after-hours calls by content (hip precaution questions, wound drainage concerns, DVT prophylaxis questions, pain management questions, equipment questions) and linking each category to the discharge instruction version provided allows identification of the most common instruction gaps and supports targeted revision.
- Unplanned ED visits and hospital readmissions within 90 days of total hip arthroplasty should be tracked and categorized. Distinguishing avoidable contacts (wound drainage questions, precaution clarification, equipment problems) from genuine complications (dislocation, DVT, wound infection, periprosthetic fracture) allows practices to calculate the proportion of unplanned contacts that represent quality improvement opportunities.
- Hip dislocation events in the early post-operative period are a high-priority QAPI indicator. Each dislocation event should be reviewed to determine whether the patient received and understood precaution instructions, whether home setup was appropriate, and whether any activity preceded the dislocation. Patterns across dislocation events (same approach, same surgeon, same instruction deficiency) suggest targeted improvement opportunities.
- Surgical site infection surveillance after total hip arthroplasty should use a 90-day tracking window consistent with NHSN definitions for arthroplasty procedures. Facilities need a mechanism for receiving infection reports from patients who present to outside providers after their THA and a protocol for requesting records and culture results. NHSN publishes national infection rate benchmarks for hip arthroplasty annually, providing a comparison reference for facilities monitoring their own rates.