Trigger finger is caused by inflammation of the synovium, enlargement of the tendon, and thickening or narrowing of the sheath itself, usually in the area of the palm closest to the fingers. The name of the tendon sheath in this area is the âA1 pulleyâ.
Wiktionary(0.00 / 0 votes)Rate this definition: 1  isotonic(Adjective) having the same osmotic pressure. 2  isotonic(Adjective) Having the same concentration of solutes as human blood. Use an isotonic saline solution in your neti pot to prevent irritation of your nasal passages. 3  isotonic(Adjective) having equal tension.
In case of a saline solution (seawater included), it means that an Isotonic solution is 9â° (that's NOT 9% - that's PARTS PER THOUSAND) salt and 991â° purified water. In a roundabout way, one might say that Isotonic seawater has only 1/3 the salt content of regular ocean water (not the Dead Sea!).