Analysis of instability patterns in acute scaphoid fractures by 4-dimensional computed tomographic imaging

Analysis of instability patterns in acute scaphoid fractures by 4-dimensional computed tomographic imaging - Kinematical patterns in acute scaphoid fractures

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

NL-OMON

Registry ID

NL-OMON45313

Enrollment

Registered

2017-05-05

Start date

2017-06-28

Completion date

Unknown

Last updated

2024-02-28

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

fracture of the scaphoid bone fracture through the boat-shaped bone

Interventions

4D-CT scan

Fracture

Kinematics

Scaphoid

Eligibility

Age

18 Years to 64 Years

Inclusion criteria

Inclusion criteria: - Patients with a one-sided scaphoid fracture - Patients are over the age of 16 years - Patients who are willing and able to give informed consent

Exclusion criteria

Exclusion criteria: - Surgical history of the scaphoid fracture - A history of trauma (treated with a cast or surgically) to the contralateral non-fractured wrist - Not able to understand the written informed consent - Pregnancy - (Peri-)lunar dislocation - Pain, to the degree that the patient is not able or willing to move the hand

Design outcomes

Primary

Measure	Time frame
The aim is to estimate the motion of the distal fragment relative to the proximal fragment expressed in two parameters (rotation and translation). For these experiments the apparent changes in position of the fragments with respect to each other are displayed as a rotation around a Helical Axis of Motion (HAM)28 and translations along the HAM. The HAM notation therefore reduces the standard motion parameters (3 translations and 3 rotations) to one rotation and one translation. We will define the mean (µ) and standard deviation (*) of the displaced group and non-displaced group.	—

Measure

Time frame

The aim is to estimate the motion of the distal fragment relative to the proximal fragment expressed in two parameters (rotation and translation). For these experiments the apparent changes in position of the fragments with respect to each other are displayed as a rotation around a Helical Axis of Motion (HAM)28 and translations along the HAM. The HAM notation therefore reduces the standard motion parameters (3 translations and 3 rotations) to one rotation and one translation. We will define the mean (µ) and standard deviation (*) of the displaced group and non-displaced group.

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Secondary

Measure	Time frame
A: Because of the small sample size we will only be able to describe a trend: time to union in relation to the motion of the distal fragment relative to the proximal fragment expressed in two motion parameters; rotation and translation. The HAM notation reduces the motion parameters from 3 translations to 1 translation; and 3 rotations to 1 rotation around an axis. B: For the second analysis, the carpal kinematics of each carpal bone will be described by 3 translation parameters and 3 rotation parameters expressed in terms of a general coordinate system of the radius, and recorded as a function of time. The HAM translation and rotation of each carpal bone and inter-fragmentary bone displacement will be compared between the injured wrist and the non-injured wrist in each individual. We expect to find significant changes in the dynamics of carpal bones during motion of the wrist in patients with a scaphoid fracture.	—

Measure

Time frame

A: Because of the small sample size we will only be able to describe a trend: time to union in relation to the motion of the distal fragment relative to the proximal fragment expressed in two motion parameters; rotation and translation. The HAM notation reduces the motion parameters from 3 translations to 1 translation; and 3 rotations to 1 rotation around an axis. B: For the second analysis, the carpal kinematics of each carpal bone will be described by 3 translation parameters and 3 rotation parameters expressed in terms of a general coordinate system of the radius, and recorded as a function of time. The HAM translation and rotation of each carpal bone and inter-fragmentary bone displacement will be compared between the injured wrist and the non-injured wrist in each individual. We expect to find significant changes in the dynamics of carpal bones during motion of the wrist in patients with a scaphoid fracture.

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Countries

The Netherlands

Outcome results

None listed

Source: NL-OMON (via WHO ICTRP)