Abstract: A spinal prosthesis has a prosthetic vertebral body in the form of a hollow cylinder (1) with perforated wall and attached prosthetic intervertebral discs formed by springs (7,8) molded into silicone-rubber beads (9,10). Anchoring of the cylinder (1) to the damaged vertebra (II) is by means of entrapment of an elongate lug (12) of the cylinder 1 within a slot (16) of a plate (11) retained by screws (12) within a recess (13) of the damaged vertebra (II). The springs (7,8) of the resilient beads (9,10) are attached to the natural vertebrae (I,III) superior and inferior to the damaged vertebra (II) by fixing plates (3,4) which have flanges (20,21) that are held by screws (22) to those vertebrae (I,III). Where adjoining vertebrae are damaged, two or more prosthetic cylinders (1) for anchoring to the individual vertebra are used with interconnecting resilient beads (9;10).

Abstract: An intra-urethral catheter for a male patient, has a lumen (7) interrupted within the prostatic space (S) of the patient's urethra (U), by a blockage (8), and upper and lower by-pass openings (9, 10) through the catheter-wall (6) are located one above and one below the blockage (8). The upper opening (9) discharges urine collected from the bladder (B) to flush the prostatic space (S), and the lower opening (10) passes the urine back into the lower part (7?) of the lumen for discharge. In a modification, the length of the catheter below the sphincter (M) of the bulbar urethra and the external urethral orifice (O), is of membraneous form (11), and at the external urethral orifice (O) extends into a portion (12) for folding back over the glans (G). A ring (13) retains the folded-back portion (12) on the glans (G).

Abstract: A spinal prosthesis has a prosthetic vertebral body in the form of a hollow cylinder (1) with perforated wall and attached prosthetic intervertebral discs formed by springs (7,8) moulded into silicone-rubber beads (9,10). Anchoring of the cylinder (1) to the damaged vertebra (II) is by means of entrapment of an elongate lug (12) of the cylinder 1 within a slot (16) of a plate (11) retained by screws (12) within a recess (13) of the damaged vertebra (II). The springs (7,8) of the resilient beads (9,10) are attached to the natural vertebrae (I,III) superior and inferior to the damaged vertebra (II) by fixing plates (3,4) which have flanges (20,21) that are held by screws (22) to those vertebrae (I,III). Where adjoining vertebrae are damaged, two or more prosthetic cylinders (1) for anchoring to the individual vertebra are used with interconnecting resilient beads (9;10).

Abstract: An intra-urethral catheter for a male patient, has a lumen (7) interrupted within the prostatic space (S) of the patient's urethra (U), by a blockage (8), and upper and lower by-pass openings (9,10) through the catheter-wall (6) are located one above and one below the blockage (8). The upper opening (9) discharges urine collected from the bladder (B) to flush the prostatic space (S), and the lower opening (10) passes the urine back into the lower part (7?) of the lumen for discharge. In a modification, the length of the catheter below the sphincter (M) of the bulbar urethra and the external urethral orifice (O), is of membraneous form (11), and at the external urethral orifice (O) extends into a portion (12) for folding back over the glans (G). A ring (13) retains the folded-back portion (12) on the glans (G).