Finger reattachment

Definition

Finger reattachment (or replacement) is defined as reattachment of the part that has been completely amputated.

Purpose

Replantation refers to reattachment of a completely severed part, meaning there is no physical connection between the part that has been cut off and the person. Reattachment can be surgically performed for the finger and such other detached body parts, as the hand or arm.

Demographics

Good candidates for this procedure include persons with thumb or multiple digit amputation . Injury to multiple digits is an important patient selection criterion, since in some cases the least damaged digits may be shifted to the least injured or most useful stump. Patient exclusion is neither clear-cut nor absolute. Generally, severe crushing or avulsing (tearing away) injuries to the fingers may make replantation difficult, but venous grafts may help replace injured blood vessels. Additionally, older persons may have arteriosclerosis that frequently impairs function in blood vessels, especially in small vessels. Special efforts may be made to replant fingers if the person's livelihood (such as professional musical performance) depends on absolute finger control.

Description

To increase efficiency, the replantation team splits into two sub-teams. One sub-team in the operating room cleans the amputated finger with sterile solutions, places it on ice, and identifies and tags (with special surgical clips) nerves and blood vessels. Dead or damaged tissue is surgically removed with a procedure called debridement . The emergency room (ER) sub-team will assess the patient during a physical exam with x rays of the injured area, blood analysis, and cardiac (heart) monitoring. The patient is given fluids intravenously (IV), a tetanus injection, and antibiotics . Usually, most finger reattachments are performed with a local anesthetic such as bupivacaine and a nerve block to numb the affected arm. Maintaining a warm body temperature can enhance blood flow to the affected limb.
The surgical procedure consists of several stages. The bone in the amputated finger must be shortened and fixed, which means that the bone end is trimmed. After this process, the bone is stabilized with special sutures called K-wires, and fixed pins are placed in the bone after drilling a space to insert them. This process connects the two amputated bone fragments. After bone stabilization and fixation, the extensor and flexor tendons are repaired. This step is vital, since arteries, veins, and nerves should never be surgically connected under tension. Next, the surgeon must repair (suture) cut-off tendons, arteries, veins, and nerves. Healthy arteries and veins are sutured together without tension. A vein graft is used for blood vessels that cannot be reattached.
Nerve repair for finger reattachment is not difficult. Since the reattached bone parts are shorter than the original length, nerves can be reattached without tension. A microscope is used for magnified visualization of finger nerves during reattachment. When the severed ends of the nerve cannot be reattached, a primary nerve graft is performed. Finally, it is vital superficial veins on the affected finger (dorsal veins) to cover with a skin flap to prevent death of the venous vessels. The skin over the surgical field is loosely sutured with a few sutures. Any damaged tissue that may die (necrotic tissue) is removed. No tension should be placed on the skin fields during closure of the wound. Wounds are covered with small strips of gauze impregnated with petrolatum. The upper extremity is immobilized, and compression hand dressing and plaster splints are arranged to prevent slipping and movement of the affected arm.

Diagnosis/Preparation

The diagnosis is easily made by visual inspection since the finger(s) must be completely detached from the hand. The reattachment procedure is complex and involves the expertise and skill of a highly trained surgeon. There are several important factors necessary to successful replantation, including special instrumentation and transportation of the amputated finger. Surgical loupes (binocular-type eyepieces used by surgeons to magnify small structures during surgery) are necessary for this procedure. Instruments should be at least 3.9 in (10 cm) long to allow for proper positioning in the surgeon's hands. Special clips are used to help suture blood vessels together. The best method of saving and transporting the amputated finger is to wrap it with moistened cloth (Ringer's lactate solution or saline solution) and place it on ice. Generally, the tissues will survive for about six hours without cooling. If the part is cooled, tissue survival time is approximately 12 hours. Fingers have the best outcome for transportation survival, since digits (fingers) do not have a large percentage of muscle tissue.

Aftercare

Postoperative care is vital for successful finger reattachment. The hand is wrapped in a bulky compression dressing and usually elevated. If arterial flow is impaired, then the hand should be lowered, since this maneuver will promote blood flow from the heart to the reattached finger. If venous outflow is slow, the hand must be elevated. Medications to increase blood flow (peripheral vasodilators) and an anticoagulant (heparin) are used. A tranquilizer may be given to reduce unnecessary blood vessel movement (vasospasm) that can occur due to anxiety. Careful examination of the reattached digit(s) is necessary. The surgeon frequently monitors color, the capacity of blood vessels, capillary refill, and warmth to monitor replant progress. The YSI telethermometer monitors the digital (finger) temperature with small surface probes. Skin temperature falling below 86°F (30°C) indicates poor blood perfusion

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POSTED BY ATTORNEY RENE G. GARCIA
Some of our clients have suffered these kinds of injuries due to a serious accident or malpractice. The Garcia Law Firm, P.C. was able to successfully handle these types of cases. For a free consultation please call us at 1-866- SCAFFOLD or 212-725-1313.