that the rule had been disavowed by a number of jurisdictions and wrote that the modern tendency “is to treat the older rule as an illegitimate off-spring of the rule that release of one joint tort-feasor releases all, which rule is itself condemned by some of our ablest scholars on the theory that the courts have confused release of a party with satisfaction of a cause of action.”
We cited a number of precedents which had adopted or changed to the rule that the release of the original named tort-feasor did not necessarily release an unnamed subsequent tort-feasor. In addition to the cases cited in Cannon v. Pearson, supra, we now add Dickow v. Cookinham, 123 Cal.App.2d 81, 266 P.2d 63, 40 A.L.R.2d 1066 (1954); Kyte v. McMillion, 256 Md. 85, 259 A.2d 532 (1969); Smith v. Conn., 163 N.W.2d 407 (Iowa 1968); Steeves v. Irwin, 233 A.2d 126 (Me.1967); Galloway v. Lawrence, 263 N.C. 433, 139 S.E.2d 761 (1965); DeNike v. Mowery, 69 Wash.2d 357, 418 P.2d 1010 (1966); Rudick v. Pioneer Memorial Hosp., 296 F.2d 316 (9th Cir.1961); Leech v. Bralliar, 275 F.Supp. 897 (D.Ariz.1967).
The rule that a release of an original tort-feasor also releases a malpracticing physician finds its basis in the broader common-law rule known as the unity of release rule. The unity of release rule is based upon the idea that there is such a unity of the obligation or injury that a release of one is release of all. After a re-examination of this common-law rule, we have now determined to place our decision in this case upon a broader base than that expressed by our dictum in Cannon v. Pearson.
The legal basis for the unity of release rule has been challenged by every legal scholar who has examined it. 4 Corbin, Contracts, Sec. 931-935 (1951); 1 Harper and James, The Law of Torts, Sec. 10.1 (1956); Prosser, Law of Torts, Sec. 46 (3d ed. 1964); Prosser, Joint Torts and Several Liability, 25 Cal.L.Rev. 413 (1937); Salmond, Torts, p. 90 (11 ed. 1953); Throckmorton’s Cooley on Torts, Sec. 80 (1930); 2 Williston, Contracts, Sec. 338A (3d ed. 1959); Note, 17 Ill.L. Rev. 563 (1923).
Underlying much of the criticism is the idea mentioned in Cannon v. Pearson, supra, that there has been a confusion of satisfaction of a claim with release of a cause of action. As expressed by Prosser: “A satisfaction is an acceptance of full compensation for the injury; a release is a surrender of the cause of action, which might be gratuitous, or given for inadequate consideration.” Prosser, Joint Torts and Several Liability, 25 Cal.L.Rev. 413, 423 (1937). Unless the settlement with one of the tort-feasors fully satisfies the injured party, the release of one party should, according to Prosser, release only the tort-feasor who makes the partial settlement.
Those jurisdictions which purport to follow the unity of release rule have, nevertheless, looked with favor upon devices, such as the “covenant not to sue” or a reservation of a cause against others, which are used to skirt the rule. Texas is among those jurisdictions which hold that such devices will save the cause against another tort-feasor when a release would be fatal to it. Riley v. Industrial Finance Service Co., 157 Tex. 306, 302 S.W.2d 652 (1957); Hunt v. Ziegler, 271 S.W. 936, aff'd, 280 S.W. 546 (Tex.Com.App.1926, jdgmt adopted); Pearce v. Hallum, 30 S.W.2d 399 (Tex.Civ.App.1930, writ ref.); Lone Star State Life Ins. Co. v. Foster, 250 S.W.2d 949 (Tex.Civ.App.1952, writ ref. n. r. e.); City of Coleman v. Kenley, 168 S.W.2d 926 (Tex.Civ.App.1943, writ ref. w. o. m.); Cox v. Rio Grande Valley Telephone Co., 13 S.W.2d 918 (Tex.Civ.App.1929, writ dis.); Pennington v. Bevering, 9 S. W.2d 401 (Tex.Civ.App.), aff’d on other grounds, 17 S.W.2d 772 (Tex.Com.App.1929, jdgmt adopted); St. Louis, I. M. & S. Ry. Co. v. Bass, 140 S.W. 860 (Tex.