Postoperative treatment of metacarpal injuries

The aftercare can be divided into four phases of healing:

• Inflammatory phase (week 1–3)
• Early repair phase (week 4–6)
• Late repair and early tissue remodeling phase (week 7–12)
• Remodeling and reintegration phase (week 13 onwards)

• Principle: protection of the injured (operated) wrist to facilitate uneventful healing
• Aim: healing without complications while facilitating early movement

The patient is encouraged to position the arm to facilitate lymphatic and venous drainage to avoid swelling.

Splinting helps with soft-tissue healing, especially of skin and ligaments incised during a surgical approach. In unstable situations, splinting protects the reduction and fixation.

Rest the hand and wrist with a well-padded below-elbow splint applied on the dorsal aspect according to specific injury type for up to 6 weeks. A double-layered bandage may be sufficient for simple reconstruction procedures. A firmer plaster or synthetic splint may be required for the support of more complex reconstructions over a longer period. Splintage should not be applied in a complete circumferential manner: if the bandage becomes wet it may shrink and act like a tourniquet causing swelling in the distal part of the limb, and even a compartment syndrome.

In cases of complex reconstruction, postoperative splinting time may be longer. Permanent MCP and PIP joint immobilization for longer than 4 weeks is not recommended as there is an increased risk for stiffness.

A sling should be used to support the hand and forearm when the patient is mobile. Ideally, the hand should be held higher than the elbow to avoid edema caused by dependency.

These are intended to avoid edema in inactive soft tissues leading to interstitial fibrosis, adhesions, and contractures.

The patient should be encouraged to touch the skin of the affected hand (and fingers) and to use the hand (and fingers) to touch surfaces and objects as comfort permits. This encourages the restoration, retention, and maintenance of cutaneous and articular sensibility and may contribute to avoiding adverse events such as complex regional pain syndrome.

Specific exercises are determined by the injury pattern and treatment undertaken. Patient education and monitoring are ideally undertaken by a hand therapist.

Exercises should not provoke pain. Self-directed exercises are encouraged: frequent sets of low-amplitude, high-repetition movements are safer and more easily performed than infrequent sets of high-amplitude movements.

Resting between sets of exercises must be in a posture which avoids dependent swelling.

This illustration shows an exercise to mobilize the interossei muscles.

This illustration shows an exercise to mobilize the lumbrical muscles and superficial and deep flexor tendons.

This illustration shows exercises to mobilize the carpal rows.

• Principle: continued protection of the injured (operated) hand with the promotion of directed tissue repair
• Aim: established healing of injured tissues with isometric strength

The same principles apply as in the first phase.

As soft-tissue healing progresses and swelling subsides, splintage can be removed for greater periods of time during which functional activities can be performed.

Resistance exercises can be introduced in addition to the exercises of the first phase.

• Principle: reestablishment of proprioception in the hand
• Aim: encourage normal tissue structure and reinnervation through daily activities without secondary injury

The limb can be rested without elevation. But long periods of dependent positioning should be avoided as swelling can still occur.

The need for external splintage is dictated by functional demands. Temporary or removable splintage may be used to protect the healing limb or joint.

Functional exercises are dictated by the specific injury or operation. The aim is to introduce activities relevant to the patient’s occupation or functional needs.

• Principle: normalization of the proprioceptive function with optimal biomechanics
• Aim: to establish normal tissue structure and reinnervation through training and practice for optimal endurance

Recurring swelling should not occur in this stage and the need to rest or position the limb is no longer required.

Functional bracing may still be indicated to protect the healed limb from overload in situation where instability can be provoked.

Normal occupational and personal activities should be resumed.