Case Study: Functional Rehabilitation in Sequential Bilateral Total Hip Arthroplasty (THA) (Staged Procedure)

Bilateral hip replacement: strong>Target: Physiotherapists, Physiatrists, Orthopedic Surgeons. Focus: Management of transient asymmetry, pre-operative conditioning of the second side, and final restoration of pelvic symmetry.

1. Clinical Assessment and Surgical Timeline

Patient: Male, 66 years old. Diagnosis: Severe bilateral coxarthrosis (Kellgren-Lawrence Grade IV). Surgical Strategy: Staged Bilateral THA (Sequential arthroplasty).

• T0: Right THA.
• T1 (+6 Months): Left THA.

Integrated Imaging Analysis (Pre and Post-Op):

• Pre-Op: Symmetrical degenerative Bone-on-Bone pattern, marked osteophytosis and subchondral cysts. Severe bilateral functional limitation.
• Post-Op (Current Status): Final X-ray shows optimal bilateral implant positioning.
  • Stems: Uncemented (press-fit) with optimal canal fill.
  • Cups: Correct inclination within Lewinnek’s Safe Zone (40-45°).
  • Geometry: Restoration of femoral offset and correct Leg Length (LLD).

2. Clinical Reasoning: The “Two-Speed” Challenge

Unlike simultaneous bilateral procedures, the sequential (Staged) procedure presents the rehabilitation specialist with three distinct biomechanical phases, each with specific pitfalls according to the Kinetic Chain:

1. The Interim Phase (0-6 months post 1st surgery): The patient has a “new” hip (Right) and an “old” stiff and painful hip (Left).
   • Risk: The operated hip (Right) cannot express its potential because the contralateral limb (Left) doesn’t allow fluid gait. This creates a Transient Functional Discrepancy: the arthritic hip (often flexed and adducted) “pulls down” the pelvis, altering the load on the newly placed prosthesis.
2. Forced “Prehab”: During rehabilitation of the Right hip, we are involuntarily conditioning the Left for imminent surgery.
3. The Integration Phase (Post 2nd surgery): Now the patient has two prostheses, but with different biological ages (one mature at 6 months, one acute). The risk is overconfidence on the second one.

3. Integrated and Sequential Rehabilitation Protocol

PHASE A: Post-Op RIGHT HIP (Months 1-6) – “Living with the handbrake on”

Objective: Protect the Right prosthesis while the Left hip limits function.

• Asymmetric Load Management:
  • Weaning from crutches will be slower. The left hip (non-operated) is painful and unstable. Early transition to 1 crutch (on the healthy/left side) is often counterproductive because it excessively loads the arthritic hip.
  • Strategy: Maintain 2 crutches or Nordic Walking poles until the second surgery if left-side pain is high (> VAS 6), to avoid compensatory Trendelenburg on the right.
• Muscle Target:
  • Maximize gluteus medius and quadriceps trophism on the Right. This leg must become the Load-bearing Pillar (Pivot Leg) that the patient will rely on completely during the acute phase of the second surgery.

PHASE B: Post-Op LEFT HIP (From Month 6 onwards) – “The Completion”

Now the patient enters the operating room with a better setup compared to the first surgery, having a stable and pain-free contralateral limb (Right), albeit prosthetic.

1. Extensor Chain Reactivation (Symmetrization) Now that mechanical blocks are removed from both sides, we need to “reset” the brain that has memorized years of flexed walking.

• Sit-to-Stand (Asymmetric Focus): Chair rise exercise. Initially the patient will load 70% on the Right (old prosthesis) and 30% on the Left (new). Objective: Bring the load to 50-50 within the 4th week. Use two bathroom scales under the feet for visual biofeedback.
• Hip Extension in Standing: Perform alternating posterior extensions. Essential for stretching the Psoas (often bilaterally retracted) and activating the Gluteus Maximus.

2. Proprioception and Loading: The “New Height” Challenge Having corrected bilateral degeneration, the patient will often feel “taller” with a modified center of gravity.

• Bipedal Exercises on Foam: Isometric squats on proprioceptive cushion. Essential for teaching the Core to manage two mobile hips simultaneously.
• Single Leg Stance (Flamingo):
  • Balance on Right leg (old prosthesis): Usually easy.
  • Balance on Left leg (new prosthesis): Will be difficult. Work here to equalize the deficit.

3. Gait and Stair Re-education (Evolution)

• Gait Training with Poles: Use of Nordic Walking poles to emphasize dissociation of girdles (right shoulder advances with left leg). This breaks the typical “block” pattern of the rigid patient.
• Stairs:
  • Weeks 1-3 Post 2nd Surgery: Ascent with Right (stronger), descent with Left.
  • Week 4+: Alternating ascent. This is the true test of Left Quadriceps concentric strength.

4. ADL and Car Management (Specific for Sequential)

• Car Entry:
  • Until complete recovery of the Left, the Right leg (operated 6 months earlier) acts as a stable ground pivot. The patient sits, and brings in the Left leg (newly operated) with hand assistance or with a towel, rotating the pelvis as a block.
• Hygiene:
  • Maintain the toilet seat raiser until both hips achieve safe and controlled flexion without pain (usually 3 months after the second surgery).

4. Outcome and Prognosis

The advantage of the Staged Procedure is safety: the patient faces the second round with a solid “safety leg” (the first prosthesis). However, the physical therapist must watch for the Memory Effect: the patient will tend to protect the second hip much less than the first, because they “already know how it works” and have less pain. This increases the risk of dislocation or early overload on the second one. Complete functional recovery (perfect symmetry of strength and ROM) is generally achieved between the 3rd and 6th month after the second surgery.

Clinical Note for Colleagues: Pay attention to any perceived Leg Length Discrepancy. Between the first and second surgery, the patient will have perceived the operated leg as “longer”. After the second surgery, this sensation must disappear. If it persists, evaluate pelvic obliquity from adductor or quadratus lumborum retraction.

Bibliography

Surgical Sciences &038; Biomechanics (Surgical Management &038; Biomechanics)

1. Taheriazam A., Saeipour A.“Staged Bilateral Total Hip Arthroplasty.”Orthop Res Rev. 2017;9:49-54.
   • Specific study on staged procedure. Analyzes clinical and functional outcomes of patients operated in two stages, confirming excellent safety profile and recovery.
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   • Cuscino abduzione post-protesi anca (paid link) (Riabilitazione | 25-45€)
   • Fascia elastica resistenza anca (paid link) (Esercizi | 10-20€)
   • Rialzo WC post-operatorio (paid link) (Riabilitazione | 25-50€)
2. Lewinnek G.E., et al. “Dislocations after total hip-replacement arthroplasties.”J Bone Joint Surg Am. 1978;60(2):217-220.
   • The absolute “Gold Standard” for acetabular cup positioning. Essential to justify the biomechanical stability cited in the clinical case (Safe Zone).
3. Engh C.A., et al. “Clinical and radiographic assessment of a porous-surfaced, titanium-alloy total hip replacement femoral component.”J Bone Joint Surg Am. 1990;72(10):1470-1484.
   • Fundamental study on uncemented stems (Press-Fit) and biological integration (spot welds), corresponding to the implant type visible in the patient’s X-rays.
4. Callaghan J.J., et al. “Durable fixation with a proximally porous-coated tapered cementless femoral component.”J Bone Joint Surg Am. 2000;82(4):487-497.
   • Confirms longevity and stability of tapered uncemented implants, supporting the surgical choice for a 66-year-old patient.
5. Dorr L.D., et al. “Structural and cellular assessment of bone quality of proximal femur.”Bone. 1993;14(3):231-242.
   • Bone quality classification (Dorr Type A, B, C), crucial for pre-operative planning and uncemented stem selection.
6. Hardt K.D., et al. “Immediate stability of a tapered wedge stem: a biomechanical investigation.”Hip Int. 2013;23(6):576-582.
   • Biomechanical analysis on primary stability of wedge stems, fundamental to justify early loading in rehabilitation.

Rehabilitation &038; Functional Sciences (Rehabilitation &038; Functional Recovery)

7. Husby V.S., et al. “Early maximal strength training is an efficient treatment for patients operated with total hip arthroplasty.”Arch Phys Med Rehabil. 2010;91(1):73-81.
   • Demonstrates that maximal strength training (not just gentle mobilization) is safe and effective in early phases, crucial for a patient facing two surgeries.
8. Mikkelsen L.R., et al. “Early, intensified home-based rehabilitation after total hip replacement: a prospective study.”Arch Phys Med Rehabil. 2012;93(1):15-22.
   • Supports the importance of intensive home-based work (exercises with elastic bands, loading) to optimize functional outcome between surgeries.

For a broader overview of related conditions, see our complete guide to hip pain.

References

1. Berend ME, Ritter MA, Meding JB, Faris PM, Keating EM, Faris GW, Crites BM, Davis KE. Bilateral total hip arthroplasty: one-stage versus two-stage procedures. Clinical Orthopaedics and Related Research, 2007.
2. Ritter MA, Harty LD, Davis KE, Meding JB, Berend ME. Simultaneous bilateral, staged bilateral, and unilateral total hip arthroplasty: a survival and cost comparison. Journal of Bone and Joint Surgery American, 2003.
3. Parvizi J, Tarity TD, Steinbeck MJ, Politi RG, Joshi A, Purtill JJ, Sharkey PF. Management of stiffness following total hip arthroplasty: modular neck vs fixed neck. Journal of Arthroplasty, 2006.

Sources and Scientific References

1. Cosic F et al. (2019). Outcomes of total hip arthroplasty surgery in heart and lung transplant recipients. ANZ J Surg. 89:729-732. DOI | PubMed
2. Blumberger DM et al. (2022). Effectiveness of Standard Sequential Bilateral Repetitive Transcranial Magnetic Stimulation vs Bilateral Theta Burst Stimulation in Older Adults With Depression: The FOUR-D Randomized Noninferiority Clinical Trial. JAMA Psychiatry. 79:1065-1073. DOI | PubMed
3. Branson JJ et al. (2001). Sequential bilateral total knee arthroplasty. AORN J. 73:610-35; quiz 637-42. DOI | PubMed
4. Batailler C et al. (2023). Is sequential bilateral robotic total knee arthroplasty a safe procedure? A matched comparative pilot study. Arch Orthop Trauma Surg. 143:1599-1609. DOI | PubMed
5. Mou P et al. (2021). Synchronous or sequential cementless bilateral total hip arthroplasty for osseous ankylosed hips with ankylosing spondylitis. BMC Musculoskelet Disord. 22:302. DOI | PubMed
6. Smith MB et al. (2024). Sequential bilateral total ankle replacements: No difference in patient-reported outcomes between the first and second ankle. Foot Ankle Surg. 30:520-523. DOI | PubMed

Frequently Asked Questions

What is sequential bilateral total hip arthroplasty (THA)?

Sequential bilateral THA involves two separate hip replacement surgeries performed at different times, rather than simultaneously. This approach allows your body to recover from the first surgery before undergoing the second procedure.

How does the unoperated hip affect recovery after the first hip replacement?

After your first hip replacement, the stiffness and pain from your unoperated hip can influence the recovery of your new hip. This creates a ‘two-speed’ challenge, where the older, painful hip may limit the full potential and fluid movement of the newly replaced hip.

Does rehabilitation after the first hip surgery help prepare for the second one?

Yes, the rehabilitation you undergo after your first hip replacement inadvertently helps condition your second hip for its upcoming surgery. This ‘forced prehab’ can contribute to a smoother transition and recovery for the second procedure.

What are the main challenges during the period between the two hip surgeries?

During the interim phase between surgeries, you’ll have one new hip and one old, painful hip, which can lead to a transient functional discrepancy. The older hip may alter your gait and place different loads on your newly replaced hip, potentially making crutch weaning slower.

What is the goal of rehabilitation once both hips have been replaced?

After both hips are replaced, the primary goal of rehabilitation is to ensure a balanced recovery and optimal function for both sides. This integrated approach helps restore pelvic symmetry and allows you to achieve the best possible long-term mobility and quality of life.