Thermo Therapy Term Paper 9 pages

Thermo Therapy

Application of healing thermal agents to certain body areas that feel wounded or dysfunction is heat treatment. The main use of a heat treatment is to help alleviate pain, support muscle repose, increase function of the tissue cells, improve blood flow, and remove poison from cells and to increase the extensibility of soft tissues. Superficial and deep are the two types of heat treatment. Superficial heat treatments apply heat to the exterior part of the body. Heat aimed at certain inner tissues through ultrasound or by electric current is deep heat treatment. Heat treatments are favorable before exercise, giving a limbering up result to the soft tissues involved. Heat treatment using conduction as a form of heat transfer in hot pacts is very common. Damp heat packs are easily available in most hospitals, physical treatment centers and sports teaching rooms.

For tissue heating many thermal agents are on hand. Superficial and deep heating agents are the two groups and they usually fall within one of these two. Paraffin wax, hot packs and a hot current are some of the superficial agents. Ultrasound, which is a deep heating agent, is used to raise the temperature of deeper tissues. Application of both superficial and deep heat to the body tissues shows many physiological changes. The degree of these changes depends on some factors: the amount of tissue shown to the heat; the rate of heat inside the tissue and the degree of the temperature rise. When the heat of the tissue temperature is raised between 40C and 45 “C (104F and 113F), utmost therapeutic effect can be attained. The blood flow will rise to the heated area, when the tissues reach this temperature. Tissues when heated to temperatures over this level will have the potential to burn. Many therapeutic advantages are there when the tissue temperature is increased. Temperatures effect chemical reactions in the cells within the body. (Weinberger; Fadilah, Lev, 232)

An enhancement in the chemical reaction allows for a rise in oxygen uptake, as a result more nutrients will be available to help tissues cure more rapidly. Heating an area is linked to an improved blood flow to that area. Nutrients are carried and wastes are removed away from the area more efficiently, when there is an increased blood in the wounded area. Therapeutic heating has also shown to reduce pain and to help decrease muscle contraction. The physiological changes underlying these benefits include an increase of the level where pain is experienced, an alteration in the rate of signal conduction along a nerve and a fall in the rate of commencement of the muscle fibers. Temperature increase in amalgamation with elasticity will also help to change the length of connective tissue. If full range of motion movements is not made next to a wound, connective tissue structures will gradually condense. Adhesions may expand between the tissue layers and scar tissue may develop at the place of wound to further control mobility. Heat and stretch in amalgamation can result in reduced joint stiffness and improved tissue flexibility, thereby assist in easiness of movement and increase in range of motion. (Helfand; Bruno, 303)

The deep heat causes an increase in temperature from the exchange of energy into heat as it pierces the tissue of the body where the energy is applied. Ultrasound (high-frequency sound), electromagnetic radiation (microwaves) and high-frequency currents (short wave diathermy) are some of the energy sources. The temperature sharing in the tissue heated by any of these modalities is subjected to the type of relative heating, which is the amount of energy transformed to heat at any given position. The practitioner must select a heating modality that creates the highest temperature at the place of concern without exceeding the temperature acceptance at the affected site or in the tissues above or below that site. The properties of the tissue like the specific heat, thermal conductivity and the duration of time of the heat modality is applied depends on the increase in temperature. The spreading of both heat and temperature is connected with these modalities and are placed over on the physiological temperature distribution in the tissues before the diathermy treatment. Generally, the superficial temperature is considered minimum at the skin surface and more at the center. The physiological effects of temperature arise at the place of the treatment and in remote tissue. (Lehman; De Lateur, 562)

The reactions of cellular function by direct and reflex action are the local effects and are due to the high temperature. There is an enlarged blood flow linked with capillary dilatation and increased capillary permeability. There may be changes in the pain verge and the preliminary tissue metabolism rises. Reflex vasodilatation and decrease of muscle contraction are the distant changes from the heated target location and are due to skeletal muscle relaxation. At the point where the healing results are required, energetic heating is done which causes highest temperature. The temperature rise of the tissue is fast bringing it near the forbearance level. Energetic heating is used for persistent conditions, which require heating of deep structures such as large joints. As the swelling can be concealed, this modality requires great care in use with severe inflammatory processes. As the main effect is a higher temperature at a point away from the modality treatment local temperature is maintained during mild heating. During a sub-acute process reflex vasodilatation happens when the rise of temperature is slow for short periods. With proper treatment both superficial and deep heating methods can be got by mild heating. Short wave diathermy is the best technique for large area deep heating. This modality is helpful for different indications. (Biundo; Torres-Ramos, 293)

High radio frequency electrical currents are used in the remedial treatment of heat modality. The radio frequency electromagnetic field is generally at a frequency of 27.12 MHz (1=11.06m). The main physiological effects are analgesia, sedation and hyperemia. The decrease in muscle contraction is due to the muscle relaxation and is got as a result of increased vascular supply to the treated area. A slanting method is used to treat a larger anatomic area with the primary focus at the mid point between electrodes. Proper treatment and corrections are needed. The patient’s electrical impedance becomes part of the impedance of the patient’s own circuit. As movement can affect the amplitude of the heat concentration applied, screening of patient movement is necessary. Selective heating of the joint is done by the inductive coil technique, which uses coil applicators that selectively heat superficial musculature unless applied to joints with least overlying soft tissue. Tissues with high water content like muscles are heated by inductively coupled units that use induced eddy currents to heat tissue. Electrical fields with units connected to provide collective capacity are used to heat low water content tissues like fat. The positioning effects are minimized by the self-adjusting resonators. (Fedorczyk, 114)

Plastic spacers or felt aid in the condenser method of treatment. To prevent localized heat focus, a towel should be used to sop up perspiration with both condenser and inductive methods. The patient must be told to stay still. The short wave diathermy unit is adjusted to low power as per patient’s forbearance and the meter readings should be noted correctly. Heating localization depends upon coupling of radio waves to the patient. Microwave diathermy is a deep heat modality that selectively heats tissues with high water content and is a form of electromagnetic radiation. Short wave diathermy shows various physiological effects like hyperemia, sedation and analgesia. Secondary local vascular dilatation results in improved limited metabolism. Healing effects of deep heating modalities generally are produced by the change of applied energy into heat as it pierces tissue. The clinician should use the suitable modality for the situation at hand because the temperature allocation varies considerably across different modalities. The temperature increase produced by the modality should be the most bear by the patient to give best healing effect. For a certain restricted pathology, the deep heating modality chosen should produce a maximum temperature increase at that specific point. (Helfand; Bruno, 306)

Superficial heating modalities in contrast to deep heating modalities, generally do not heat deep tissues, inclusive of muscles as the subcutaneous sheet of fat under the skin surface acts as a thermal insulator and hinder heat transfer. Moreover, improved cutaneous blood flow from superficial heating causes a cooling reaction as it removes the heat that is applied outwardly. Usually the transfer of heat (whether the intention is heating or cooling) is divided into three types of heat transfer (conduction, convection, conversion). Conductive heating is the heat transfer from one point to another without the obvious movement in the conduction medium. Naturally a straight contact takes place between the source and the target tissues. Superficial heat is a conductive heat (hot water baths, hot packs, electric heating pads, warm compresses). Convective heating is got by movement of the moving heating medium, which is either air or fluid. (Grana, 439)

Fluidotherapy, current, hot air baths, damp air baths are the methods for providing convective superficial heat. The conversion of energy from one energy form (light, sound) to another (heat) is the conversion form of heating, which involves heat transfer. Radian light bakers or heat lamps make superficial heat, where the heat is transmitted when the transmission medium (light energy) is changed to heat energy at the skin surface. Generally, conductive heating is an easy modality and the patient can be trained for individual home use. The drawbacks of this modality are difficulty in applying to areas showing irregularity (foot), likely burns and the skin-drying effect (excepting paraffin or water media). An additional drawback that may happen is the injury of local vascular supply, due to a mixture of the weight of the modality on the limb or the weight of the limb on the modality. This occurrence can also be due to the irregular sharing of pressure on the anatomical region that the medium links. (Travell; Simons, 78)

Hydro collator or hot packs contain silicate gel in a cotton bag. These packs are placed in hot water tanks that are thermostatically controlled at 71.1-79.4C. The silicate get has a high heat capability and absorbs a large quantity of water. Hot packs are applied for 20-30 minutes over layers of towels. Conduction is the main form through which heat is transferred from hot pack to the patient. Kenny pack (brisk short-term stimulation/heating), rubber hot water bottle and electric heating pad are other forms of hot packs. If the heated part is covered in damp cloth or if the pad is wet, heat transfer is improved. Superficial thrombophlebitis, menstrual pain, abdominal muscle contraction and painful muscle contraction are the symptoms for the application of hot packs. Chemical packs are also available in containers which when operated correctly will allow formerly alienated element to mix, thereby producing an exothermic chemical reaction that causes heat production. Another form of conductive heating is paraffin bath. Paraffin baths are mostly useful for contractures due to rheumatoid arthritis, burns and progressive systemic sclerosis (scleroderma). Paraffin is generally applied to arms, feet and hands. (Oosterveld; Rasker, 1578) bed of uniform finely divided round solids, like glass beads are used in to which thermostatically controlled warm air is blown to make a semi-fluid warm mixture, is used is fluidotherapy, which is a form of convective heating. For superficial heating, a part of the limb hand/foot can be immersed. This method uses dry heat and the temperature is equal to the hot air that is puffed into the bed of beads. The complete immersion in a large hot tub or Hubbard tank is the hydrotherapy. Using vortex baths, part immersion is available for upper and lower limits. The hydrotherapy instrument must be cleaned between uses as it can be used in curing impure tough injury. The size of the tank decides the size (full body or just the upper or lower limits) and the water are agitated. As the heat regulatory mechanism is damaged considerably the heat loss occurs mainly through the head and neck when the entire body is immersed. The complete body immersion has a soothing effect and may influence the patient to hypo tension due to peripheral blood pooling secondary to vasodilatation of all four limbs. Damp air cabinet is another form of convection modality. (Lehman; De Lateur, 568)

Blowing air saturated with water vapor at a limited temperature over the patient causes superficial heating over a large area. The temperature spreading in this modality provides heating of skin and superficial tissue. Polyarticular arthritic conditions and back muscle contraction are the symptoms for which this modality is used. Different baths provide a method of healing hyperemia for management of rheumatoid arthritis or sensitively formed pain (rheumatoid arthritis of distal joints, hands, feet; prolonged ankle swelling after an ankle sprain/strain in refractory joint effusions). Water-based exercises and spa treatment are the other method of convective heating (balenotherapy). Decrease in joint stiffness, increased flow, reposing of muscle tension, preparation of tissues for treatment and universal availability and low-cost, are some of the patient benefits of superficial heat. (Grana, 441)

The physical analyst may use one or more of the following measures: ultrasonic waves that produce heat inside and diathermy (application of electric current to generate heat in body tissues), infrared and ultraviolet lamps, melted paraffin wax and heat treatments involving the use of water at various temperatures, while treating a patient. The remedial exercise in various forms is one of the most vital jobs of the physical analyst. It is used to boost energy and stamina, to develop coordination, to improve efficient movement for activities of daily living, and to increase and retain range of motion. To relieve aching, hardened joints, heat treatments like heat lamps, bandage and vortex baths are generally used. Ultrasound waves (another source of heat) can speed curing in deeper body tissues. Damp heat can help ease sign (mainly pain) and loosen up tight tendons, while deep heat often is used earlier to stretching exercises in physical treatment. A study suggests that in hospitals heating up cancers as well as giving radiotherapy treatment could be an efficient treatment. The heating method is considered to work well because the blood flow to the tumor is raised. Sensory impaired patients or mentally challenged patients who are hospitalized receive disseminated warm-fluid hot packs to reduce the possibility for burns due to extended superficial heating. (Lehman; De Lateur, 572)

Certain studies suggest that this carries more oxygen to the cancerous tissues and can also help in other treatments to kill cancer cell more efficiently. Athletic trainers are the essential members of the athletic health care team, with the support of doctors and other health care workers. They can provide a variety of cure and measures like protective bracing, ultrasound, electrical stimulation, heat treatments and widening and strengthening injured muscles. Hydro collator packs, heating pads and current baths are the general forms of heat treatment. Damp heat is more favorable than dry heat as it has the ability to pierce more severely in to the muscle tissue. The deeper the heat infiltration into the muscle, the more successful will be the treatment. The suggested extent of time for damp heat treatment is 20-30 minutes. The heat treatments should be done at a temperature that is contented to the sportsperson. Heat treatments should never be painful due to extreme heat. Though the use of heat can reduce aches, joint hardness and muscle contraction, it should not be used as a treatment in the first few days after the injury. (Fedorczyk, 116)

The usage of heat immediately after an injury will lead to enlarged inflammation, enlarged uneasiness and a bigger loss of movement. If inflammation appears during or after the use of heat, compression, return to ice and rise immediately should help to control it. While using a vortex bath the temperature should be maintained at 100 F. To 104 F. A sportsperson should not be allowed to use a vortex bath for more than 20-30 minutes and should never be left unattended. To stop the growth of bacteria, the vortex baths should be cleaned or chemically treated at least once a day. (Helfand; Bruno, 311)

The cause for low back troubles are due to the muscle contraction, dragged muscles and stressed muscles or ligaments. To reduce back pain, heat can be a very useful treatment. The cause for low back troubles are due to the muscle contraction, dragged muscles and stressed muscles or ligaments. To reduce back pain, heat can be a very useful treatment. Increasing blood circulation and receiving the warmness deep into the affected tissues at the spot of the pain by using the Sterling ‘deep heat’ choice in combination with a brief massage can relieve back pain. Through many centuries people have become familiar that heat can reduce aches. We apply electric heating pads or immerse in hot tubs, as we know spontaneously that heat will help us feel better. Heat improves cell function (metabolism), movement, reduces stiffness in tendons and ligaments, relaxes the muscles and decreases muscle contraction and reduces pain. (Bigos; Bowyer; Braen; et al., p.4)

Medical experts elucidate that heat cause’s dilation of the blood vessels in the area being treated. The rise in the blood flow carries fresh blood to the area and takes away waste from it. The effect is that heat relieves pain and hastens curing. The use of heat may be useful to the back, when a back wound occurs. Heat is to be used only if the indications last longer than 48 hours. A hot shower or bath or a heating pad can help in reducing muscle strain and pain. One must be cautious in using a heating pad to prevent burns and should not be used while sleeping. A method called intra-disc electrotherapy (IDET) heats nerve endings, making them less responsive and blocking pain signals from the discs. Doctors who perform IDET stress that it is not appropriate for all patients with lower back pain. They also say for those it can help, it offers a less aching and a low-cost solution than spinal blending – the normal treatment process in which two or more vertebrae in the spine are combined together using either bone grafts or metal rods. Application of heat would also be of help in treatments after low back surgery. After surgery heat packs can be applied with the proper guidance of doctors. Hot baths and hot compresses can prove to be beneficial. Heating applications should be limited to twenty minutes each to avoid more heat and to prevent dangers. (Bigos; Bowyer, Braen, 5)

Thus in conclusion it can be said that the main use of a heat treatment is to help alleviate pain, support muscle repose, increase function of the tissue cells, improve blood flow, and remove poison from cells and to increase the extensibility of soft tissues. Heat treatments are now increasingly used in physical therapy clinics, hospitals, and athletic training rooms. It has also proved beneficial for both acute and chronic low back pain and also in treatments after low back surgery

References

Bigos S, Bowyer O, Braen G. et al. Acute lower back problems in adults. Clinical Practice Guideline, Quick Reference Guide Number 14. Department of Health and Human Services, Public Health Service, Agency for Health Care Policy and Research, AHCPR Pub. No. 95-0643. December 1994.p.3-6

Biundo JJ Jr., Torres-Ramos FM: Rehabilitation and biomechanics. Curr Opin Rheumatol 1991 April; 3(2): 291-99

Fedorczyk J: The role of physical agents in modulating pain. Journal of Hand Therapy 1997 Apr-June; 10(2): 110-21

Grana WA: Physical agents in musculoskeletal problems: heat and cold therapy modalities. Instructional Course Lecture 1993; 42: 439-42.

Helfand AE, Bruno J: Therapeutic modalities and procedures. Part I: Cold and Heat. Clinical Podiatry 1984 Aug; 1(2): 301-13

Lehman JF, De Lateur BJ: Therapeutic Heat (Chapter 9). Therapeutic Heat and Cold. 4th ed. Baltimore: Williams and Wilkins 1990; 417-581.

Oosterveld FG, Rasker JJ: Effects of local heat and cold treatment on surface and articular temperature of arthritic knees. Arthritis Rheum 1994 Nov; 37(11): 1578-82.

Travell JG, Simons DG: Apropos Of All Muscles. Myofascial Pain and Dysfunction. In: The Trigger Point Manual, the Upper Extremities. Vol 1. Baltimore, MD: Williams & Wilkins 1983: 45-102.

Weinberger A, Fadilah R, Lev A: Deep heat in the treatment of inflammatory joint disease. Med Hypotheses 1988 Apr; 25(4): 231-33

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