PI is moving to another university; resident researcher does not wish to continue study with another PI.

It has been the investigators observation that large diameter traction pins cause more postoperative knee pain than smaller traction pins. To the investigators knowledge, no study to date has identified knee pain as a consequence of traction pin placement. Furthermore, no study has identified whether pin size has an effect on the incidence of postoperative knee pain. The goal of the present study is to establish whether use of temporary skeletal traction is associated with subsequent knee pain and to determine whether traction pin size influences the incidence and/or magnitude of knee pain.

Objective #1:

Determine whether pin size influences the incidence and/or severity of postoperative knee pain in patients who undergo temporary skeletal traction.

Hypothesis:

Larger traction pins are associated with an increase in both the incidence and severity of postoperative knee pain.

Objective#2:

Determine whether pin size affects musculoskeletal function in the postoperative period.

Hypothesis:

There is no difference between small and large traction pins in postoperative musculoskeletal function.

Inclusion Criteria:

• Male and female adults
• At least 18 years old
• Injury (Pelvic, acetabular, or femoral fracture) requiring temporary skeletal traction.

Exclusion Criteria:

• Neurovascular compromise.
• Ipsilateral fractures presenting contraindication to skeletal traction
• Patients who are non-ambulatory.
• Patients less than 18 years of age.
• Patients who do not speak English.
• Ipsilateral ligamentous knee injury

Patients admitted to the University of Utah Trauma and/or Orthopaedic Trauma services indicated for skeletal traction pin placement based on the presence of a femoral diaphyseal fracture and/or certain pelvic and acetabular fractures.