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Home Electrotherapy

Functional Electrical Stimulation And It Clinical Uses

by adminp
June 20, 2022
in Electrotherapy
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Functional Electrical Stimulation
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Functional Electrical Stimulation is the technique in which electrical stimulation is used in order to obtain a desired functional movement.
It has been in use since 1960. Lieberson was the ย first one who used it for the treatment of foot drop. It had been used in the past for the patient suffering from chronic strokeย or the gait ย abnormalities.
In Functional Electrical Stimulation, biphasic rectangular constant impulses are ย used, with variation of pulse width from 150 ms-40 ms depending upon the severity of degeneration, a single session of 60 min or twice a day with 30 min is usually enough to achieve appropriate results.
Recruitment of muscles is not a single step. In fact, a synergistic sequence is programmed and after its programming, the stimulation is used to obtain the desired therapeutic results.

Functional Electrical Stimulation Application Technique:

Electrodes are placed on the appropriate stimulation points on muscle. As these electrodes are mostly surface electrodes, so they do not make contact with the stimulation points appropriately. For this reason, multiple researches are ongoing. According to these researches, in order to obtain best results, there should be an implantation of the electrodes and stimulator in the muscles or the nerves, depending upon the results required.
Set the activation sequence on the computer control system before applying the electrodes on the patient so that the patient can easily perform the required functional pattern. For further safety of the patient, some sort of feedback from the stimulated muscles should be obtained. This can help the computer control system to correct the movement errors.
There are various methods that can be used to achieve the programmed movement patterns. mostly foot switches or crutch switches are used for the activation purpose.

Functional Electrical Stimulation Clinical Uses:

  1. Foot drop (stroke)
  2. In spinal cord injured patients for obtaining flexion in swing phase.
  3. In upper limb, functional grasp strength can be enhanced in stroke, TBI, CF, SCI.
  4. It has shown good results in the case of hemiplegic shoulder to prevent subluxation.
  5. Functional Electrical Stimulation can be used as an adjunct in the exercise programme designed for the patient suffering from neuro muscular problems.
  6. It also increases the strength of the bladder in an uncontrolled bladder that has been caused by some neurological problem.

Examples ofย Functional Electrical Stimulation:
Some examples ofย Functional Electrical Stimulation use are given below:

Use ofย Functional Electrical Stimulation For Haemiplegic Shoulder:

In a haemiplegic patient, The sublaxation of the shoulder is decreased by use ย ofย Functional Electrical Stimulation as it increases the strength in the muscle surrounding the shoulder. The pulse duration should be 200-350 us, frequency should be 30-40 pps, ramp up time and down time both should be of 3 sec, time duration should be 30 min-6 hr, 5-7 days/week. 4-6 weeks.
Functional Electrical Stimulation shoulder

ย Use Ofย Functional Electrical Stimulation For Improving Hand Or Upper Extremity Function:

Functional Electrical Stimulation causes a reduction in the spasticity and increases the strength along with an increase in the range of motion. Significant improvements in the grasp have been shown in many studies. Pulse duration should be 200-350 us, frequency should be 30-40 pps, ramp up time and down time should be kept very short for obtaining the effect. The timeduration depends upon the fatigue of the muscles.
Functional Electrical Stimulation UE
Use Of FES For Gait Improvement:
It helps in the clearance of the foot from the ground by providing the assistance with dorsi flexion. A foot switch or remote switch has to be placed under the heel of the patient. Now as the foot moves in to swing phase, the pressure from the switch is relieved and there will be activation of the stimulation process, And when again pressure is put on to the switch, this stimulation ends.
The pulse duration should be 200-3450 us, frequency should be 30-40pps, ramp up time and down time should be kept at 0 sec. The time duration depends upon the fatigue of the muscles.
functional electrical stimulation gait
Use Of FES For Exercise:
In the spinal cord injured patients, FES can also used for exercise. The most common example of this is the use of a bicycle that is responsible for the stimulation of the muscles of lower extremity like quadriceps, glutei and hamstring muscles. This is not only helps to increase the strength butt also increases cardiovascular endurance and decreases the risk of osteoporosis.

adminp

adminp

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