Clinical lectures on the principles and practice of medicine . omen, to divert the patients attention,and make him look straight forwards, otherwise these movements becomeso affected as to vitiate the results. The instruments may be applied inthe sitting or recumbent posture. The method of applying them with astring attached is shown in Fig. 19, and the mode of using Dr. Sibsonachest-measurer by placing the pinion on the nail of the observers finger, Fig. 18. The stethometer of Dr. Quain—half the real size. Fig. 19. Mode of applying the instrument when the string is used.—(R. Quain.) 46 EXAMIN
Clinical lectures on the principles and practice of medicine . omen, to divert the patients attention,and make him look straight forwards, otherwise these movements becomeso affected as to vitiate the results. The instruments may be applied inthe sitting or recumbent posture. The method of applying them with astring attached is shown in Fig. 19, and the mode of using Dr. Sibsonachest-measurer by placing the pinion on the nail of the observers finger, Fig. 18. The stethometer of Dr. Quain—half the real size. Fig. 19. Mode of applying the instrument when the string is used.—(R. Quain.) 46 EXAMINATION OF THE PATIENT moving with the chest, is seen Fig. 21. If held in the hand, as in and 21, great steadiness and care are requisite to arrive at exact Sibsons instrument may be attached to brass rods, which are bent atright angles, so as to present the form of ]J. The upper arm is movable,and admits of elongation by means of a split tube, so that in this wa^great steadiness is arrived at, while the instrument itself can be carried. Fig. 20. Fig. 21. to any part of the chest or abdomen, without disturbing the position ofthe patient, as seen in Fig. 22. There is, however, considerable variation even in health in differentpersons. Some, for instance, can cause the second rib to advauce twoand a quarter inches during forced inspiration, whilst others can onlycause it to advance three quarters of an inch. The motion of the wholeleft side, excepting that of the second rib, is somewhat less than on theright side. It should also be remembered that the motion of the tenthrib indicates that of the diaphragm. The pressure of the stays in thefemale exaggerates the thoracic and diminishes the abdominal movements. Fig. 20. The chest-measurer of Dr. Sibson, natural 21. Mode of applying the chest-measurer.—(Sibson.) BY MENSURATION. 47 According to the observations of Dr. Sibson, made with this instru-
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectmedicine, bookyear187
