Method and apparatus for knee joint flexibility rehabilitation

1. A knee joint flexibility rehabilitation apparatus comprising:

a tubular main strut having a main strut foot configured for engaging a patient support surface, the tubular main strut forming a first aperture;

a bracket attached to the tubular main strut;

a height-adjustment bar translatably and rotatably disposed in the tubular main strut, the height-adjustment bar having a diameter, the height adjustment bar forming a plurality of second apertures extending through the diameter of the height-adjustment bar;

a knee-joint support bar fixed substantially perpendicularly to the height-adjustment bar, the knee-joint support bar being configured to receive a knee joint posterior;

a support strut pivotably connected to the bracket, the support strut having a support strut foot configured for engaging the patient support surface, the support strut pivotable away from a position in which the support strut is parallel to the tubular main strut to a position in which the support strut forms an acute angle with respect to the tubular main strut; and

a pin removably disposable in a first orientation in one of the plurality of second apertures to fix the height-adjustment bar against translation in one direction but permit rotation of the height-adjustment bar with respect to the tubular main strut when the knee joint posterior is disposed on the knee-joint support bar, and removably disposable in a second orientation in the first aperture and one of the plurality of second apertures to fix the height-adjustment bar against rotation and translation with respect to the tubular main strut when the knee joint posterior is disposed on the knee-joint support bar.

2. The apparatus of claim 1 , the pin being further removably disposed in the first orientation in one of the plurality of second apertures to fix the height-adjustment bar against translation in one direction but permit rotation of the height-adjustment bar with respect to the tubular main strut, or removably disposed in the second orientation in the first aperture and one of the plurality of second apertures to fix the height-adjustment bar against rotation and translation with respect to the tubular main strut.

3. The apparatus of claim 1 , wherein the main strut foot is substantially perpendicular to the tubular main strut, and the support strut foot is substantially perpendicular to the support strut.

4. The apparatus of claim 1 , wherein the knee-joint support bar is padded.

5. The apparatus of claim 1 , wherein the bracket is configured to prevent travel of the support strut away from the tubular strut beyond a predetermined angle.

6. A method of knee joint rehabilitation therapy, the method comprising:

orienting a patient to a supine position upon a substantially level surface, the patient having a buttock and at least one leg connected to the buttock, the leg comprising a thigh and a lower leg connected by a knee joint, the knee joint having a posterior portion;

raising the patient's leg away from the substantially level surface;

disposing a knee joint rehabilitation apparatus under the patient's leg, the apparatus comprising:

a tubular main strut having a main strut foot configured for engaging a patient support surface, the tubular main strut forming a first aperture;

a bracket attached to the tubular main strut;

a height-adjustment bar translatably and rotatably disposed in the tubular main strut, the height-adjustment bar having a diameter, the height adjustment bar forming a plurality of second apertures extending through the diameter of the height-adjustment bar;

a knee-joint support bar fixed substantially perpendicularly to the height-adjustment bar, the knee-joint support bar being configured to receive a knee joint posterior;

a support strut pivotably connected to the bracket, the support strut having a support strut foot configured for engaging the patient support surface, the support strut being pivotable away from a position in which the support strut is parallel to the tubular main strut to a position in which the support strut forms an acute angle with respect to the tubular main strut; and

a pin removably disposable in a first orientation in one of the plurality of second apertures to fix the height-adjustment bar against translation in one direction but permit rotation of the height-adjustment bar with respect to the tubular main strut when the knee joint posterior is disposed on the knee-joint support bar, and removably disposable in a second orientation in the first aperture and one of the plurality of second apertures to fix the height-adjustment bar against rotation and translation with respect to the tubular main strut when the knee joint posterior is disposed on the knee-joint support bar;

wherein the apparatus is disposed on the substantially level surface under the patient's leg so that the main strut foot is adjacent the patient's buttocks, and so that the tubular main strut is substantially parallel to the thigh of the patient's leg;

translating the height-adjustment bar so that the knee-joint support bar contacts the posterior of the knee joint of the patient's leg or approximately thereto;

inserting the pin either in one of the plurality of second apertures to fix the height-adjustment bar against translation in one direction but permit rotation of the height-adjustment bar with respect to the tubular main strut when the knee joint posterior is disposed on the knee-joint support bar, or in both the first aperture and one of the plurality of second apertures to fix the height-adjustment bar against rotation and translation with respect to the tubular main strut when the knee joint posterior is disposed on the knee-joint support bar; and

allowing the patient's lower leg to extend past the knee-joint support bar in cantilever fashion so as to permit a gravitational force on the lower leg to promote rehabilitation of the knee joint.

7. The method of claim 6 , further comprising the step of inserting the pin in the first orientation into one of the plurality of second apertures so as to prevent translation of the height-adjustment bar toward the substantially level surface but permit rotation of the height-adjustment bar with respect to the tubular main strut.

8. The method of claim 6 , further comprising the step of inserting the pin in the second orientation into the first aperture and into one of the plurality of second apertures so as to prevent translation and rotation of the height-adjustment bar.