What is the FDS tendon?
What is the FDS tendon?
Flexor digitorum superficialis (FDS) tendons FDS tendons help bend the index, middle, ring, and small fingers at the middle finger joint. They are powered by a common muscle belly shared by all the fingers, which divides into 4 tendons. They travel down the forearm and within the carpal tunnel.
What is FDS and FDP?
The flexor digitorum superficialis [FDS] and flexor digitorum profundus [FDP]) originate proximally in the forearm, at the medial epicondyle of the elbow. They, along with flexor pollicis longus (FPL) and the median nerve, travel through the carpal tunnel at the wrist and enter the palmar surface of the hand.
What does tendon laceration mean?
Tendon lacerations are an injury to the tendon that most commonly impacts the flexor and extensor tendons of the hand. A cut due to a knife or glass is the most common cause of these types of injuries.
What does FDS mean in hand?
The flexor digitorum superficialis (FDS/sublimis) is a flexor of the digits of the hand and has been reported to have varying degrees of agenesis.
How do you test for FDS laceration?
To test the FDP tendon, the patient flexes the distal phalanx. To test the FDS tendon, MCP and PIP joints are released, distal phalanges are kept extended, and the patient flexes the finger. The PIP joint and, to a lesser degree, the MCP joint should flex.
How do you test Fds for index finger?
Thus the common maneuver for testing the FDS is to hold all other fingers fully extended while allowing only one finger at a time to flex, assuring the proximal interphalangeal (PIP) joint actively flexes but there is no tension from the FDP across the DIP joint.
What happens when a tendon is cut?
If a tendon is torn or cut, the ends of the tendon likely will be pulled apart, making it impossible for the tendon to heal on its own because of the gap between the two ends. It is not uncommon for other structures to be injured at the time of a cut flexor tendon.
How long does a lacerated tendon take to heal?
The repaired tendon will usually be back to full strength after about 12 weeks, but it can take up to 6 months to regain the full range of movement. Some people may never be able to move the affected finger or thumb as much as before it was damaged.
How is FDS function tested?
To test flexor digitorum superficialis, the patient is asked to flex PIP joint of one of the digits from 2nd to 5th while other remaining three digits held in extension so as to inactivate Flexor Digitorum Profundus.
How do you stretch FDS?
To give your flexor digitorum superficialis a good stretch, stand an arm’s length from a wall. Place your flattened hand on the wall with your fingers pointing downwards. Gently lean into your palm to feel a stretch. Hold for 15-30 seconds then switch arms.
How are flexor tendon lacerations treated nonoperatively?
There is no acceptable nonoperative management for combined FDS and FDP tendon lacerations. Alternatives to staged flexor tendon reconstruction include arthrodesis and amputation. Isolated chronic disruption of the FDP tendon with an intact FDS tendon is best treated nonoperatively.
What is the function of the FDS tendon?
Restoration of FDS tendon function allows for independent proximal interphalangeal joint flexion and helps provide for a smooth gliding surface for the FDP tendon at this level. Contraindications Combined repair of FDS and FDP tendons distal to the A2 pulley is not attempted in all cases.
What is a flexor tendon injury?
summary Flexor Tendon Injuries are traumatic injuries to the flexor digitorum superficialis and flexor digitorum profundus tendons that can be caused by laceration or trauma. Diagnosis is made clinically by observing the resting posture of the hand to assess the digital cascade and the absence of the tenodesis effect.
Are FDP and FDs in the same tendon sheath?
– FDP and FDS are in same tendon sheath. – Oblique pulley is more important than the A1 pulley. – Outcomes different than fingers. Tendon healing after flexor tendon injury occurs through the activity of extrinsic and intrinsic mechanisms, occurring in three phases:
