Tenodesis grasp: Difference between revisions

Revision as of 14:11, 21 February 2025

A passive hand grasp mechanism

Tenodesis grasp

Illustration of the wrist position in tenodesis grasp

The tenodesis grasp is a passive hand grasp mechanism that occurs due to the natural biomechanics of the wrist and finger tendons. It is particularly significant in individuals with certain levels of spinal cord injury where active finger flexion is impaired.

Mechanism

The tenodesis grasp relies on the anatomical relationship between the extensor and flexor tendons of the hand. When the wrist is extended, the fingers naturally flex due to the tension in the flexor tendons. Conversely, when the wrist is flexed, the fingers tend to extend. This phenomenon is due to the passive tension in the tendons and is utilized in rehabilitation to enable grasping in individuals with limited hand function.

Clinical significance

File:Tenodese hand.jpg

Demonstration of tenodesis grasp in a clinical setting

The tenodesis grasp is particularly important for individuals with tetraplegia resulting from cervical spinal cord injury. These individuals often lack voluntary control over their finger muscles but can still achieve a functional grasp by using wrist extension to passively flex the fingers. This allows them to hold objects and perform daily activities with greater independence.

Rehabilitation

In rehabilitation, therapists often teach patients how to use the tenodesis grasp effectively. This involves strengthening the wrist extensors and training the patient to use wrist movements to control finger position. Adaptive devices and splints may also be used to enhance the effectiveness of the tenodesis grasp.

Related pages

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-{{Short description|A surgical procedure involving the fixation of a tendon to a bone}}
+{{Short description|A passive hand grasp mechanism}}
-==Overview==
+== Tenodesis grasp ==
-[[Tenodesis]] is a surgical procedure that involves the fixation of a [[tendon]] to a [[bone]]. This procedure is often used to restore function or stability to a joint by altering the mechanics of the tendons and muscles involved. Tenodesis can be performed in various parts of the body, including the [[wrist]], [[shoulder]], and [[ankle]].
-==Indications==
+[[File:Wrist_related_tenodesis_effect,_second_step.JPG|thumb|right|Illustration of the wrist position in tenodesis grasp]]
-Tenodesis is indicated in cases where there is a need to stabilize a joint or restore function due to tendon injury or dysfunction. Common indications include:
-* [[Rotator cuff]] tears
+The '''tenodesis grasp''' is a passive hand grasp mechanism that occurs due to the natural biomechanics of the [[wrist]] and [[finger]] tendons. It is particularly significant in individuals with certain levels of [[spinal cord injury]] where active finger flexion is impaired.
-* [[Biceps tendon]] injuries
-* [[Achilles tendon]] ruptures
-* [[Wrist drop]]
-==Procedure==
+== Mechanism ==
-The tenodesis procedure involves the surgical attachment of a tendon to a bone. This can be achieved through various techniques, including:
-* '''Suture anchors''': Small anchors are inserted into the bone, and the tendon is sutured to these anchors.
+The tenodesis grasp relies on the anatomical relationship between the [[extensor]] and [[flexor]] tendons of the hand. When the wrist is extended, the fingers naturally flex due to the tension in the flexor tendons. Conversely, when the wrist is flexed, the fingers tend to extend. This phenomenon is due to the passive tension in the tendons and is utilized in rehabilitation to enable grasping in individuals with limited hand function.
-* '''Bone tunnels''': Holes are drilled into the bone, and the tendon is passed through these tunnels and secured.
-* '''Screws''': Special screws are used to attach the tendon directly to the bone.
-===Wrist Tenodesis===
+== Clinical significance ==
-[[File:Wrist_tenodesis.jpg|thumb|right|Diagram of wrist tenodesis]]
-In the wrist, tenodesis is often used to treat conditions such as wrist drop, where the extensor tendons are not functioning properly. The procedure involves attaching the tendons of the wrist extensors to the bones of the wrist to restore extension.
-===Shoulder Tenodesis===
+[[File:Tenodese_hand.jpg|thumb|left|Demonstration of tenodesis grasp in a clinical setting]]
-[[File:Shoulder_tenodesis.jpg|thumb|left|Illustration of shoulder tenodesis]]
-In the shoulder, tenodesis is commonly performed for biceps tendon injuries. The long head of the biceps tendon is detached from its original attachment and reattached to the humerus, relieving pain and restoring function.
-==Recovery==
+The tenodesis grasp is particularly important for individuals with [[tetraplegia]] resulting from cervical [[spinal cord injury]]. These individuals often lack voluntary control over their finger muscles but can still achieve a functional grasp by using wrist extension to passively flex the fingers. This allows them to hold objects and perform daily activities with greater independence.
-Recovery from tenodesis surgery varies depending on the location and extent of the procedure. Generally, patients can expect:
-* Immobilization of the joint for a period of time to allow healing
+== Rehabilitation ==
-* Physical therapy to restore range of motion and strength
-* Gradual return to normal activities over several weeks to months
-==Complications==
+In rehabilitation, therapists often teach patients how to use the tenodesis grasp effectively. This involves strengthening the wrist extensors and training the patient to use wrist movements to control finger position. Adaptive devices and splints may also be used to enhance the effectiveness of the tenodesis grasp.
-As with any surgical procedure, tenodesis carries risks of complications, including:
-* Infection
+== Related pages ==
-* Nerve damage
-* Failure of the tendon to heal properly
-* Loss of range of motion
-==Related pages==
+* [[Spinal cord injury]]
-* [[Tendon transfer]]
+* [[Tetraplegia]]
-* [[Tendon repair]]
+* [[Rehabilitation]]
-* [[Orthopedic surgery]]
+* [[Biomechanics]]
-[[Category:Orthopedic surgery]]
+[[Category:Hand]]
-[[Category:Surgical procedures]]
+[[Category:Rehabilitation medicine]]
+[[Category:Spinal cord injury]]