Publications by authors named "P Nunley"
Purpose: To determine if iatrogenic posterior translation (UIV SPi) at the upper instrumented vertebrae (UIV) is associated with increased mechanical complications and secondarily to generate and validate a UIV SPi threshold for increased complications.
Methods: Two patient databases were utilized: one for generating a UIV SPi threshold and another for validation. Patients with a UIV between T8-L1 and a LIV at ilium were included.
Objective: The goal of this study was to compare the impact of using a lower thoracic (LT) versus upper lumbar (UL) level as the upper instrumented vertebra (UIV) on clinical and radiographic outcomes following minimally invasive surgery for adult spinal deformity.
Methods: A multicenter retrospective study design was used. Inclusion criteria were age ≥ 18 years, and one of the following: coronal Cobb angle > 20°, sagittal vertical axis > 50 mm, pelvic tilt > 20°, pelvic incidence-lumbar lordosis mismatch > 10°.
Study Design: Retrospective analysis of prospective multicenter adult spinal deformity (ASD) database.
Objective: To determine the prevalence and prognosis of postoperative coronal malalignment following LLIF for ASD with Qiu type A coronal alignment.
Summary Of Background Data: Qiu Type A coronal alignment is defined as coronal vertical axis (CVA) <30mm.
Article Synopsis
- Understanding preoperative deformity in lumbar spine revisions can help improve outcomes and prevent failures in future surgeries.
- A study compared patients with no prior surgery (PRIMARY) and those with short (SHORT) or long (LONG) fusions, highlighting how different failure modes correlate with shorter fusions.
- Results showed that revision patients experienced significant alignment issues and often required more invasive correction techniques, indicating a need for better alignment strategies in future operations.
Background: Our understanding of the relationship between sagittal alignment and mechanical complications is evolving. In normal spines, the L1-pelvic angle (L1PA) accounts for the magnitude and distribution of lordosis and is strongly associated with pelvic incidence (PI), and the T4-pelvic angle (T4PA) is within 4° of the L1PA. We aimed to examine the clinical implications of realignment to a normal L1PA and T4-L1PA mismatch.
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