Authors of section


Andrew Howard, Theddy Slongo

Executive Editor

Fergal Monsell

General Editor

Chris Colton

Open all credits

Supine position

1. Introduction

The most commonly used patient position is supine with the arm either on an arm table, or directly on the draped C-arm. This position can be used for the majority of pediatric fractures of the distal humerus, both supracondylar and articular.

2. Preoperative preparation

Consider the additional material on preoperative preparation.

3. Patient positioning

The patient is positioned with the fractured extremity as close as possible to the edge of the table. To prevent the child from falling down from the operating table during reduction/manipulation. Side support is recommended.

Note: Care should be taken that the upper body is not supported by the arm table especially in younger children with a short arm. Great care must be taken to avoid extremes of neck positioning.

Lateral decubitus position

Pearl: Very small/young children (up to 5-6 years) can additionally be fixed using a towel around the thorax that is attached to the contralateral side of the table.

supine position

4. Positioning of the C-arm

There are two possible positions for the C-arm:

  • Parallel to the operating table
  • Perpendicular to the operating table

Note: After reduction has been achieved, the arm should be moved as little as possible. Images should be obtained by rotating the C-arm and not moving the arm.

supine position

5. C-arm parallel to the OR table


  • Unimpeded approach to the arm for the surgeon
  • Facilitates reduction


  • Difficult to rotate the C-arm around the elbow
supine position

6. C-arm perpendicular to the OR table


  • The surgeon has access from both the medial and the lateral side
  • Medial/lateral rotation of the C-arm avoids the need to move the arm and thereby risk loss of reduction


  • No significant disadvantages
supine position

7. Positioning of extremity in relation to C-arm

There are two options for positioning of the extremity in relation to the C-arm:

  • Arm on the arm table and intensifier below the table
  • Arm directly on the draped C-arm

8. Arm on arm table with intensifier below


  • Arm more stable


  • More difficult to positon the arm centrally on the image intensifier
  • Higher dose of radiation
  • Lower image quality, depending on dose and lucency of table
supine position

9. Arm directly on draped C-arm


  • Easier to position the arm in relation to the image intensifier
  • Better quality x-rays
  • Larger bone segment is visible, which facilitates assessment of axis
  • Reduced radiation risk


  • Less stable operating surface
supine position

10. Supine with a flexed elbow (supracondylar fractures)

When the preoperative reduction of a supracondylar fracture is undertaken unsterile with minimal assistance, the following steps can be taken:

  • Patient is supine with the arm on an arm table, or directly on the C-arm
  • Reduction is performed, the elbow is then maximally flexed and the position verified using the image intensifier
  • The maximal flexion of the elbow is then held in position with surgical tape (see illustration)
supine position
  • The skin is sterilized up to the tape
  • The arm is draped to exclude the tape from the surgical field

Note: The disadvantage of this position is that the fracture position cannot be altered during the remainder of the procedure.

supine position
Go to diagnosis