Percussion hammer is an instrument used by doctors to check neuromuscular reflex. It is mostly composed of a rubber and a wooden or metal handle. When in use, gently tap the relevant parts with the rubber end to observe the neuromuscular reflex.

Feature:

Safe and reliable quality, no side effect, portable and easy to use.

Meticulous workmanship, reliable quality, easy grip control, powerful percussion.

Made with zinc-alloy, chrome-plated head that is weighted for balance, and is entirely crafted from hand.

Descriptions:

Completely handcrafted and delicately balanced, the lightweight ergonomic handle enables neurologists and medical students to generate controlled percussions and precise movements.

Specifications:

Material:Aluminum Alloy+Silicone Gel

Shape:T-Shape

Color: Blue, Orange, Green,Black,Red

Nerve reflex is the basic way of human life activities. When the nervous system is damaged, there will be abnormal reflex. Percussion hammer is a device used to check the patient's abnormal reflex.

Usage of percussion hammer

1. Hold the percussion hammer between the thumb and index finger and quickly tap the tendon or periosteum with appropriate strength.

2. Take the wrist joint as the axis, bend the wrist 30 ° during percussion, and enhance the percussion force by increasing the speed of the distal end of the percussion hammer.

The patient's forearm is half bent. The examiner holds the patient's elbow joint with his left hand, presses the biceps muscle cell with his left thumb, and taps the examiner's left thumb with a percussion hammer with his right hand. The normal reaction is the rapid upward bending of the patient's forearm. During the examination, if the above reaction is hyperactive, weakened or disappeared, it is abnormal biceps reflex, as shown in the figure.

Biceps reflex

The afferent nerve of biceps brachii reflex is the sensory fiber in musculocutaneous nerve, the reflex center is cervical 5-6 spinal gray matter, the efferent nerve is the somatic motor fiber of musculocutaneous nerve, and the effector is biceps brachii. Abnormal reflex indicates that the reflex arc is damaged. Common symptoms include arm muscle strain, arm muscle atrophy, hand muscle atrophy, arm extension and handshake pain, complete loss of hand function, etc.

Triceps reflex

The patient bends the elbow joint. The examiner holds the forearm with his left hand and taps the triceps brachii tendon above the olecranon with a percussion hammer. The normal reaction is triceps brachii contraction and elbow joint straightening. The reflex center of triceps brachii reflex arc is in cervical section 6-7, which is conducted by radial nerve. Those without the above normal reflex indicate biceps brachii reflex arc injury. The common symptoms are arm muscle weakness or muscle atrophy.

3. Knee tendon reflex, also known as knee jump reflex

During the sitting position examination, the patient's two lower legs sag naturally, or one leg is placed on the knee of the other leg. During the supine position examination, the examiner holds up the knee joint with one hand to bend it by about 120 °, and then taps the muscle under the knee bone with a percussion hammer. The normal reaction is the rapid forward kick of the lower leg. This reflex is usually affected by the high-level parts of the central nervous system. The strength and delay of its response can reflect the functional state of the central nervous system. The weakening or disappearance of knee reflex is most common in spinal cord or peripheral neuropathy. It is one of the signs of lower motor neuron paralysis, mostly seen in myopathy, cerebellar and extrapyramidal diseases. Hyperreflexia is a sign of paralysis of upper motor neurons. It can be seen in hyperthyroidism, tetanus, low calcium convulsions, and excessive mental tension.

4. Achilles tendon reflex, also known as ankle reflex

The patient lies on his back, the hip joint and knee joint are bent, and the thigh is slightly abducted and rotated outward. The examiner holds the front of the patient's foot with one hand to bend his back, and taps the Achilles tendon with a percussion hammer. The normal reaction is that the gastrocnemius muscle contracts and the foot bends to the metatarsal surface. Extreme hyperreflexia is often accompanied by ankle clonus, suggesting pyramidal tract lesions. When sciatic nerve is damaged, lumbar disc prolapse, sciatic neuritis and tibial nerve paralysis, ankle reflex weakens or disappears, as shown in the figure.

Achilles tendon reflex

5. Radial membrane reflex

The patient's forearm is placed in the half flexion and half extension position and the forearm is slightly pronated. The examiner holds his forearm with his left hand and causes the wrist joint to sag naturally. He taps the radial styloid process with a nerve Percussion T-type medical diagnosis hammer. The normal reaction is elbow bending and forearm pronation. If the flexion of the forearm on this side is not obvious and the finger flexion occurs, it is the inverted radial periosteal reflex. The occurrence of inversion is due to the decrease of contractile force of active muscle paralysis, the diffusion of stimulation into the anterior horn of spinal cord, and the contraction of antagonistic muscle; Or due to the paralysis of the active muscle, resulting in the stretch reflex of the antagonistic muscle. The related symptoms were upper cervical spinal cord lesion, complete cervical spinal cord injury, cervical spinal epidural lesion and cervical spinal cord demyelinating lesion.

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Nerve Percussion T-type Medical Diagnosis Hammer