. The clinical study of blood-pressure : a guide to the use of the sphygmomanometer in medical, surgical, and obstetrical practice, with a summary of the experimental and clinical facts relating to the blood-pressure in health and in disease . Ul _J 1—1 I 1 1 L. 1 1 1 1 1 1 L_J 1 1 i__i 1 I _ _ Fia. 65.—Thobaootomy fob post-pheumonio empyema undeb local oooaibAirjsTHEsiA. (Authors sphygm. 12 cm.) Note the great rise in pressure with each cutting act, especially when accompanied bypain (reflex vaso-constriction). Operation by Dr. Howard Collins, City Hospital. Observation by Dr. A. H. Garvin. t
. The clinical study of blood-pressure : a guide to the use of the sphygmomanometer in medical, surgical, and obstetrical practice, with a summary of the experimental and clinical facts relating to the blood-pressure in health and in disease . Ul _J 1—1 I 1 1 L. 1 1 1 1 1 1 L_J 1 1 i__i 1 I _ _ Fia. 65.—Thobaootomy fob post-pheumonio empyema undeb local oooaibAirjsTHEsiA. (Authors sphygm. 12 cm.) Note the great rise in pressure with each cutting act, especially when accompanied bypain (reflex vaso-constriction). Operation by Dr. Howard Collins, City Hospital. Observation by Dr. A. H. Garvin. tered hypodermically, usually produced ,a distinct rise in pres-sure during collapse and shock, and seemed a fairly reliablevaso-motor stimulant. Infiltration ansesthesia must also in-crease blood-pressure temporarily, when considerable tensionof the tissues is developed. The cocainization of large nerve-trunks will be considered under the prophylaxis of shock. BLOOD-PRESSURE DURING OPERATIONS 265 Cocainization of the spinal cord, according to Gushing, mayinduce dangerous hypotension, through paralyzing, in theupper dorsal region, the efferent nerve-fibres which control thesplanchnic circulation. Application of cocain to the medulla. Fig. 66.—Excision of hydeooelb sag attek spinal cocainization.(Authors sphygm. 12 cm.) Note the absence of any special change in pressure during the operation, after theprimary rise, due to the pain or exoitenient. Operation by Dr. Eugene Fuller, City Hospital. Observation by Drs. A. H. Garvinand Garside. oblongata, in Criles experiments, reduced the blood-pressureto 40 or 50 mm., and rendered the centre inactive to reflexstimulation. Apart from the possible direct vaso-motor paraly-sis, these operations show little pressure variation (see Fig. 66).B. Influence of the Operative Procedures, a. Peripheral Opera-tions.—All cutting involves the irritation of peripheral nerve-endings, which, as a rule, provokes reflex vaso-constriction,just as in
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbloodpr, bookyear1904
