When should carpal tunnel syndrome be operated on? Surgery is usually the last step in the treatment of carpal tunnel syndrome (CTS). It becomes necessary when conservative measures (splint, therapy, injections) can no longer alleviate the symptoms or when a irreversible damage Damage to the median nerve is a risk. The decision for or against surgery is always made by a specialist (orthopedist, neurologist, or hand surgeon) based on clinical symptoms and neurological measurements.

There are clear criteria that make surgery urgently necessary in order to preserve the function of the hand.

1. Absolute indication for surgery:

Risk of permanent damage

The following symptoms and findings represent a absolute indication dar, i.e., the operation should be performed as soon as possible in order to save the nerve.

indicator	Description and consequence
Muscle wasting (atrophy)	Visible wasting of the muscles at the base of the thumb (thenar eminence). This is the most serious sign of a advanced motor impairment.
Persistent numbness (hypesthesia)	The numbness in the area supplied by the nerve (thumb, index, middle finger) consists of durable and strong and it doesn't get better, not even at night.
Severe nerve damage	The nerve conduction velocity (NCV) measurement shows a very strong slowdown or a significant loss of nerve response.
Loss of function	Massive loss of fine motor skills and grip strength, which severely restricts the performance of everyday activities (e.g. buttoning clothes, writing).

If these signs are present, the risk of irreversible damage from further delay outweighs the risk of surgical intervention.

2. Relative indication for surgery: Failure of conservative therapy

If there are no acute signs of nerve damage (such as atrophy), the time for surgery usually comes after the failure of conservative therapy.

Failure of night splint therapy

• Duration of conservative therapy: It is recommended that the conservative treatment (consistent splinting, possibly occupational therapy and cooling) over a period of at least 6 to 12 weeks to carry out.
• Result: If the symptoms (especially the nighttime tingling) do not improve or worsen despite consistent use of the splint, the mechanical compression is probably too severe to be resolved without surgical relief.

Insufficient effect of cortisone injections

• Temporary improvement: If a local cortisone injection provides short-term relief (e.g., for a few weeks), but the symptoms quickly and severely return, this signals a persistent mechanical constriction.
• Repeated injections: If the absence of symptoms after an injection is only short-lived and a second injection shows no lasting effect, this is a strong argument for surgery.

3. Operational goal: Permanent relief of the median nerve

The goal of the operation is the Split carpal ligament (Ligamentum carpi transversum). This band forms the roof of the carpal tunnel.

• Effect: The splitting of the tunnel immediately reduces the pressure, giving the median nerve more space.
• Prospects for success: In over 901 cases, the operation leads to a rapid improvement in nighttime pain and tingling sensations. Recovery of sensation and motor strength takes longer and depends on the extent of the pre-existing damage.

4. Overview: When to operate, when to wait?

The decision, when carpal tunnel syndrome should be operated on, It is a process of weighing up different factors.

Criterion for surgery	Criterion for wait-and-see/conservative
Urgent: Visible muscle wasting (atrophy).	Stage 1: Mostly nighttime tingling sensations.
Urgent: Persistent and increasing numbness (hypesthesia).	Stage 2: Success through consistent use of the night splint.
Relative: Conservative therapy fails after 6-12 weeks.	Stage 3: Short-term relief after cortisone injection.
Diagnostics: Severely reduced nerve conduction velocity.	Condition: No motor weakness or muscle atrophy is apparent.

Frequently asked questions about carpal tunnel syndrome surgery

1. Is it too late for surgery if numbness is already present?

No, it is not too late. Surgery is necessary when numbness (sensory deficits) is present and indicates persistent compression. The surgery aims to prevent these deficits from becoming permanent. However: The longer the deafness persists, the lower the chance of a full recovery. of sensitivity.

2. When should carpal tunnel syndrome be operated on if I am diabetic?

In diabetics, the indication for surgery should often be earlier The diagnosis is made. Diabetes further damages the nerves (neuropathy). Superimposed mechanical compression from carpal tunnel syndrome (CTS) can, in combination with diabetes, lead more quickly to irreversible damage. Therefore, in diabetic patients, if conservative therapy fails, intervention is not delayed.

3. What happens if I wait despite the indication for surgery?

If you wait despite a clear indication for surgery (e.g., muscle atrophy, permanent numbness), you risk… irreversible damage of the median nerve. The muscle atrophy will progress, and the numbness will be permanent. Even a later operation cannot reverse this. permanent damage then often cannot be completely fixed.

4. What is nerve conduction velocity testing and when should carpal tunnel syndrome be operated on based on this?

Nerve conduction velocity (NCV) testing is a neurological examination that measures how quickly and strongly the median nerve transmits signals. significant slowdown of the NLG It is an objective sign of nerve damage and supports the decision for surgery, especially when clinical symptoms are severe. In cases of very severe nerve conduction velocity (NCV) changes, surgery is almost always necessary.

5. When should carpal tunnel syndrome be operated on if the symptoms are severe at night?

If the symptoms exclusively at night If this occurs, the first step should be to... Night rail The brace should be worn consistently for at least 6 weeks. Surgery should only be considered if nighttime symptoms persist or worsen despite correct splinting. Nighttime symptoms alone, without failure of conservative therapy, do not warrant surgery. no immediate indication for surgery.

6. Can I have both hands operated on at the same time?

It is generally not recommended to operate on both hands simultaneously, as you need both hands for everyday tasks. Usually, the hand with the more severe symptoms is operated on first. After this hand has largely recovered (approximately 4 to 6 weeks), the second hand can be operated on.

7. Can the operation be repeated?

The operation can be repeated in rare cases (revision surgery) if the carpal ligament closes again with scar tissue or if the nerve is compressed again for other reasons (e.g., scarring, tumors). Revision surgery is technically more demanding.