“…During recent years thoracic epidural analgesia for postoperative pain relief has been subject to an increasing interest. From a clinical and physiological view excellent resultsin comparison with conventional morphine analgesiahave been reported by SIMPSON et al (1961), GREEN & DAWKINS (1966), MUNEYUKI et al (1968), SPOEREL et al (1970), SPENCE et al (1968), SPENCE & SMITH (1971), DAWKINS & STEEL (1971), HOLMDAHL et al (1972), H O L L M~N & SAUKKONEN (1972) and BRANDT & KVISSELGAARD (1 972).…”