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Sockets and Liners

The adjustable socket approach

An overview of the working principle and supportive role of a socket design whose tightness can be adapted to volume changes around the residual limb.

Adjustable socket approach: Prosthesis user using the dial adjustment knobs on a thigh socket

What is an adjustable socket?

An adjustable socket is a socket approach in which the fit between the residual limb and the socket can be changed within certain limits by the user or under the guidance of the clinical team. The aim is to help the prosthesis stay balanced on the limb despite small volume changes that may occur around the residual limb during the day.

Unlike conventional sockets with a fixed shape, in this design the tightness of the socket can be gently decreased or increased by means of movable parts or adaptable sections. The aim is to maintain contact when volume increases or decreases.

Whether this approach is suitable for a person is determined only through the assessment of a specialist physician and the clinical team, according to factors such as the condition of the residual limb, skin health and mobility level.

How does the adjustment work?

The residual limb is usually covered with a soft liner; the adaptable parts of the socket allow the contact pressure applied to the limb to be adjusted within a certain range. When volume changes during the day, the user can rebalance this setting within the limits taught by the clinical team.

The adjustment range and method of use are individual; which settings are appropriate is determined by the clinical team during the fitting trial and adaptation stage.

  • Creating a soft contact layer on the residual limb with a liner
  • Adjusting contact tightness within the defined range using the adaptable parts of the socket
  • Attempting to rebalance the fit when volume changes during the day
Adjustable socket approach: Prosthesis user using the dial adjustment knobs on a thigh socket

Key aspects of the approach

The headings below are for general information; individual results vary according to the person and the clinical assessment.

Adapting to volume change

The aim is to help maintain contact when small expansions or contractions occur around the residual limb during the day.

Adjustable tightness

Being able to adapt contact tightness within the limits set by the clinical team may help manage comfort throughout the day.

Load distribution

More consistent contact between the limb and the socket may support the management of load distribution.

From a clinical assessment perspective

An adjustable socket is one of the options that may be considered when residual limb volume can change noticeably during the day, or when the edema process is still ongoing in newly formed residual limbs. The suitability decision is based on clinical examination and measurements.

  • Assessing residual limb volume and skin condition
  • Planning the adjustment range individually
  • Comparative assessment with other socket and suspension methods
Adjustable socket approach: Person moving outdoors with a prosthetic leg that has an adjustable thigh socket

In daily use

The method of use, care and adjustment limits are explained individually by the clinical team.

Adjustable socket approach: View of the socket and foot of a person with a below-knee prosthetic leg on a forest path

Liner and skin contact

The soft liner layer acts as a buffer between the skin and the socket and contributes to gently distributing contact pressure.

Adjustable socket approach: Person moving outdoors with a prosthetic leg that has an adjustable thigh socket

Movement and comfort

Maintaining contact in an adaptable socket aims to help the prosthesis stay balanced on the limb during daily movements.

Process

The fitting process

1

Physician's Assessment

The process begins with a specialist physician's assessment and a prescription/medical report.

2

Measurement and Planning

The condition of the residual limb and volume change are assessed; the appropriate liner and socket approach are planned.

3

Fitting Trial and Adjustment

The socket is fitted; the adjustment range and contact tightness are set individually.

4

Training and Follow-up

Adjustment limits and care are explained; regular follow-up is provided for check-ups and adjustments when necessary.

Frequently asked questions

Is an adjustable socket suitable for everyone?

Suitability depends on factors such as the condition of the residual limb, volume change, skin health and mobility level, and is determined only through the assessment of the physician and the clinical team.

Can I change the settings myself?

Adjustment is made within the limits taught by the clinical team. The appropriate range and method of use are explained individually during the fitting trial stage.

How does it differ from a fixed socket?

Fixed sockets keep a single shape, while an adjustable socket allows contact tightness to be adapted within a certain range. Which approach is appropriate is assessed individually.

This content is for informational purposes; please consult your physician for diagnosis and treatment. Applications are carried out at our licensed center locations in line with a specialist physician's prescription/medical report.