Various forms and modifications of the lying position are used, to achieve full support of the body, the relative suitability of each one varying according to the condition of the patient and to individual preference.
The ingredients of comfort include freedom to breathe deeply, warmth, abdominal quiescence and a mild degree of physical fatigue.
- Restful Atmosphere
As physical and mental relaxation are interdependent, an effort must be made to secure a state of mental rest.
(i) Lying Supine
A firm surface is essential, and if resilient also, as in the case of a good spring mattress, it is ideal, as it will mould itself to the body contours and give even pressure and comfort. At all costs plinths or beds which sag are to be avoided at they cramp the thorax and so throw additional strain on the inspiratory muscles. A head pillow is required which is sufficiently soft to prevent the head from rolling to either side, and to be well molded to support the neck posteriorly. A small pillow under the knees relieves tension on the Hamstrings and the ilio–femoral ligament, and consequently allows the pelvis to roll backwards so that the lumbar spine is straightened and supported. The feet are held in the mid–position by a sandbag or similar device, and each arm, slightly abducted at the shoulder and flexed at the elbow, rests on a pillow.
(ii) Half Lying
This is similar to the previous position but breathing is easier as there is less weight on the back and abdominal pressure on the under surface of the Diaphragm is reduced. An armchair makes quite a good substitute for a plinth or bed, the thighs are fully supported and the feet rest on the floor, or a footstool, or a T–shaped footrest.
(iii) Prone Lying
The head is turned to one side and may rest on a small pillow, if more comfortable. A firm pillow under the hips and the lower abdomen prevents hollowing of the back, and for women it should extend higher to avoid too much pressure on the breasts, the lower leg is elevated so that the knees are slightly bent and the toes free. A degree of medial rotation at the hips, causing the heels to fall apart, still further induces relaxation of the legs. Many find this position comfortable and use if for sleeping, others dislike it because of the rotated position of the head.
(iv) Side Lying
The measure of relaxation obtained is governed by the efficiency with which the shoulder and pelvic girdles are stabilized. The arm are leg which are uppermost may be rested on the supporting surface instead of on pillows, but some of the weight then falls on the trunk and this impedes respiration. The head pillow supports the neck and head in alignment with the body, and must not be too high. The majority of people sleep on the side, but few are conscious of the part suitable positioning for relaxation plays in promoting it.