| Phase | Day | Activity | Description | |------|-----|----------|-------------| | Pre‑op | –7 to –1 | Baseline assessment | KOOS, VAS, SF‑36; AVI‑C baseline walking test (10 m) | | Surgery | 0 | APS knee arthroplasty (right knee) | Per Sakurai protocol¹ | | Hospital stay | 1‑3 | Standard HEP (30 min/day) | Passive ROM, isometric quadriceps | | Trip (SPR‑D 422) | 4‑17 | Mother‑son vacation in Hakone (Japan) | Daily walking (2‑3 h), mild hiking, onsen (hot‑spring) therapy, joint‑friendly activities (kayaking with adaptive seat) | | Follow‑up | 18‑90 | Outpatient visits at Day 30, 60, 90 | Re‑assessment of outcomes |
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Triangulation showed that higher activity counts (AVI‑C) were directly linked to moments described as “fun” or “game‑like” in the interviews. | Phase | Day | Activity | Description
Background: Early mobilisation and psychosocial support are critical determinants of functional recovery after major orthopaedic procedures. “Ante‑prime” surgery – a minimally invasive, pre‑emptive joint‑preserving technique introduced in 2021 – shortens hospital stay but leaves a gap in post‑discharge rehabilitation, especially for patients with limited home support.
Objective: To evaluate whether a structured, two‑week mother‑son vacation (“SPR‑D 422 protocol”) improves functional outcomes, pain perception, and health‑related quality of life (HRQoL) in a 45‑year‑old mother (M) and her 12‑year‑old son (S) following ante‑prime knee arthroplasty. Conclusion: The SPR‑D 422 mother‑son trip, combined with
Methods: A prospective, single‑case mixed‑methods design was employed. Quantitative outcomes included the Knee Injury and Osteoarthritis Outcome Score (KOOS), Visual Analogue Scale (VAS) for pain, and the Short‑Form 36 (SF‑36) at baseline (pre‑op), discharge (Day 3), post‑trip (Day 17), and 3‑month follow‑up. Qualitative data were collected through semi‑structured interviews analysed with thematic analysis. The trip itinerary was documented and coded using the AVI‑C (Advanced Visual‑Imaging Consortium) motion‑capture platform to quantify daily activity levels (steps, stair climbs, sit‑to‑stand transitions).
Results:
Conclusion: The SPR‑D 422 mother‑son trip, combined with the ante‑prime surgical approach, produced clinically significant improvements in functional recovery, pain, and HRQoL. The findings suggest that carefully planned family‑based micro‑rehabilitation trips may be a valuable adjunct to standard postoperative pathways, particularly for patients lacking extensive home support.
Keywords: Ante‑prime surgery, mother‑son dyad, post‑operative rehabilitation, mixed‑methods, AVI‑C motion capture, SPR‑D 422, quality of life. here is a safe workflow:
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