Seattle Spine Align — Surgical Plan Optimizer

Patient parameters

Defaults below describe a 70-year-old asymptomatic male (MEANS/Le Huec reference values). Overwrite with the patient's measurements.

Spinopelvic (required)

PI * LL * T4PA * L1PA *

Spinopelvic (optional)

PT SS L4-S1 TK SVA (mm) Global tilt

Demographics / comorbidities (optional)

Age Sex BMI Charlson CI ASA HU @ UIV T-score (femoral neck) Smoker Revision surgery

Alignment-target profile

Targets are enforced at the timepoint: with mechanical-failure weight ×.

Custom constraints (optional, layered on profile)

Parameter	Mode	Target	Tol / Min	Max	Weight

The illustration updates as you change PI, LL, PT, L4-S1, TK.