The Effect of Patient Position on the External Haller Index Value Among Patients With Pectus Excavatum

Zuyderland Medisch Centrum12 enrolled

Overview

Pectus excavatum is the most common anterior chest wall deformity, affecting up to 1:400 of newborns. The current gold standard to quantify the extent of deformity is by calculating the Haller Index based on a Computed Tomography (CT)-scan. However, as such scans inescapably imply exposure to ionizing radiation, novel imaging techniques have been investigated. Three-dimensional optical surface scanning is a promising new technique to acquire the trunks' three-dimensional (3D) surface topography. Based on this 3D scan, one is able to calculate the external Haller Index that is known to highly correlate with the conventional gold standard Haller Index that is based on internal measures. Both the conventional and external Haller Index are known to be affected by the respiratory phase in which the scan is acquired, however, what is the effect of patient position on the external Haller Index, and if affected, how should one correct for this phenomenon? To investigate this, a retrospective single-centre pilot study will be conducted.

Study Type

OBSERVATIONAL

Enrollment

Conditions

Pectus Excavatum

Eligibility

Sex: ALLHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Patients that received a three-dimensional optical surface scan to quantify their pectus deformity Exclusion Criteria: * None

Locations (1)

Zuyderland Medical Centre

Outcomes

Primary Outcomes

Patient position

The effect of patient position on the value of the external Haller Index, based on 3D scans.

Time frame: 5 months

Secondary Outcomes

Manual versus automatic alignment of patient position

If there is a significant effect of patient position on the external Haller Index, the ideal correction method is investigated (manual alignment versus automatic, computer-based alignment)