Photoelectric Plethysmography Research Articles

A highly sensitive, miniaturized, photoelectric plethysmograph.

SPECIAL COMMUNICATIONSA highly sensitive, miniaturized, photoelectric plethysmographRobert O. RawsonRobert O. RawsonPublished Online:01 Nov 1959https://doi.org/10.1152/jappl.1959.14.6.1049MoreSectionsPDF (606 KB)Download PDF ToolsExport citationAdd to favoritesGet permissionsTrack citations ShareShare onFacebookTwitterLinkedInWeChat "A highly sensitive, miniaturized, photoelectric plethysmograph." Journal of Applied Physiology, 14(6), pp. 1049–1050 Previous Back to Top Next Download PDF FiguresReferencesRelatedInformation Cited ByBlock of the sacral segments in lumbar epidural anaesthesiaBritish Journal of Anaesthesia, Vol. 90, No. 2Simultaneous recording of penile diameter and penile arterial pulse during laboratory-based erotic stimulation in normal subjectsJournal of Psychosomatic Research, Vol. 29, No. 3The stuttering moment: A plethysmographic studyJournal of Communication Disorders, Vol. 6, No. 3A technique for the continuous recording of gastric vascular tonicityPhysiology & Behavior, Vol. 8, No. 6The Effect of Cervico-Thoracic Sympathetic Block On the Small Blood Vessels2 July 2016 | Angiology, Vol. 17, No. 8 More from this issue > Volume 14Issue 6November 1959Pages 1049-1050 Copyright & PermissionsCopyright © 1959 the American Physiological Societyhttps://doi.org/10.1152/jappl.1959.14.6.1049PubMed14436607History Published online 1 November 1959 Published in print 1 November 1959 Metrics

The analysis of vascular reactions in the nasal mucosa with the photoelectric plethysmograph.

The analysis of vascular reactions in the nasal mucosa with the photoelectric plethysmograph.

Vasomotor reactivity in Dupuytren's contracture.

Fifteen patients with Dupuytren's contracture were studied with a photoelectric plethysmograph. Ten individuals with normal hands served as controls. Plethysmograms were recorded as follows: a ) normal hands; b ) uninvolved hand of patient with Dupuytren's contracture; c ) hand of patient with early Dupuytren's contracture; d ) hand of patient with moderate Dupuytren's contracture; e ) hand of patient with late Dupuytren's contracture; f ) hand of patient following radical surgery. There were striking changes in the vasomotor reactivity in patients with Dupuytren's contracture in comparison with patients with normal hands. Vasomotor reactivity in the condition is decreased in proportion to the severity of the contracture. After radical operative correction of the deformity there was a significant return of vasomotor reactivity toward a normal pattern. Apparently, the uninvolved hand of patients with Dupuytren's contracture shows decreased vasomotor reactivity since a large percentage of these patients develop the disease bilaterally. It is suggested that the decreased vasomotor reactivity is a physiologic change caused by disturbed function of the autonomic nervous system. Submitted on September 20, 1956

Observations on peripheral circulation in psoriasis.

PREVIOUS work 1 has demonstrated that patients with lupus erythematosus have an altered peripheral circulation, as demonstrated by changes in the form of the photoelectric plethysmogram of the fingers. It is the purpose of this paper to present evidence that the same kind of changes exist in the peripheral circulation of patients with psoriasis. This alteration in the peripheral circulation is similar to that reported in arteriosclerosis, 2 hypertension, 2 pseudoxanthoma elasticum, 3 and scleroderma. 4 MATERIAL AND METHODS Studies were made on 28 normal subjects and on 11 patients with psoriasis. The extent, acuity, or activity of the psoriasis was not recorded except to note that there was no clinical evidence of nail involvement at the time of the studies. Also, none of the patients had clinical or radiological evidence of hypertension or arteriosclerosis. The photoelectric plethysmograph used in this study was a modification of that described by Hertzman.

Coarctation of the aorta: Photo-electric plethysmography and direct arterial blood pressure measurement as an aid in diagnosis

T HE clinical diagnosis of coarctation of the aorta can be made without difficulty when there is enough constriction of the aorta to cause collateral circulation to become well established. However, the degree of constriction may vary from a slight indentation to practically complete obliteration. The site of coarctation may also vary and anomalies of the great vessels may be present. Therefore, it is advantageous to establish the site and degree of the constriction in order to decide whether or not the condition can be corrected surgically and whether operation is likely to be hazardous. The purpose of this report is to present the combination of two well established methods for the study of blood flow and blood pressure, namely, photo-electric plethysmography and direct measurements of arterial blood pressure as an aid to the diagnosis and location of coarctation of the aorta. By these means the relative blood flow of peripheral parts can be estimated and accurate blood pressure in an extremity can be measured.

Direct arterial puncture and photoelectric plethysmography in the diagnosis of coarctation of the aorta

Direct arterial puncture and photoelectric plethysmography in the diagnosis of coarctation of the aorta

A Study of Conditioned Vasomotor Responses in Ten Human Subjects*

1. The vasomotor system of 4 of 10 subjects was conditioned rapidly to a light stimulus. A faradic current was used as the unconditioned stimulus and the vascular reactions were measured by means of the photo-electric plethysmograph. Once obtained this conditioned response appeared to be relatively stable. 2. Conditioning and extinction curves of this type of conditioning did not always follow the typical curves of learning and forgetting. The irregularity of the curves may be attributed to: (a) The instability of the unconditioned responses in some subjects. (b) Changes in attitude and emotional set of the subject. (c) Other factors not studied in this experiment. 3. Three subjects who manifested signs and symptoms of autonomic nervous system imbalance were more easily conditioned than subjects who did not. 4. Subjects who were relatively easily conditioned showed more rapid and complete elimination of incidental vascular reflexes to the light stimulus, and showed a tendency toward more stable conditioned responses during extinction than subjects who were not easily conditioned. 5. The intensity of sensations as reported by a subject was not a valid indication of the magnitude of the physiological vascular reactions concomitant with these sensations.

Applications of photoelectric plethysmography in peripheral vascular disease

The clinical application of photoelectric plethysmography is described. Its use in following vascular reactions, such as the spastic phenomena of Raynaud's disease, or in evaluating the completeness of sympathetic denervation of the skin, is indicated by selected examples. Its use in estimating the arterial blood supply of the skin of various areas is illustrated on a normal subject, on a patient after sympathectomy, and after treatment with intermittent venous occlusion and iontophoresis in a case of intermittent claudication.

Distinction between arterial, venous and flow components in photoelectric plethysmography in man: Hertzman, Alrick B., and Dillon, John B.. Am. J. Physiol. 130: 157, 1940

Distinction between arterial, venous and flow components in photoelectric plethysmography in man: Hertzman, Alrick B., and Dillon, John B.. Am. J. Physiol. 130: 157, 1940

PHOTOELECTRIC PLETHYSMOGRAPHY OF THE FEMALE BREAST

VARIATIONS in the blood content of the female breast are of special interest be-cause the vascularity of this part may be influenced physiologically (by pu- V berty, the menstrual or ovulatory cycle, pregnancy, lactation, menopause) either by or with relation to the sex hormones. Breast pathology (engorgement, mastitis, tumors) also produces distinct circulatory changes. Several investigators have reported the use of photoelectric cells for the detection of changes in the blood content of tissues. Hertzjman (1) reported “the development of photoelectric plethysmographs which lend themselves to clinical use in dynamic anal-ysis of the peripheral circulation and which may be 'plugged in in place of the patient's leads on the electrocardiograph.” The photoelectric plethysmograph used by us (fig. 1, 2) was adapted from various arrangements described by Hertziman (2). The breast is illuminated by a 2.5 volt 500 milliampere (radio panel) bulb, powered, by 4 dry cells (6 volts).

Photoelectric plethysmography of animal tissues

Abstract A description of the application of photoelectric plethsymography to animal tissues is given. A suitable amplifier is designed which meets the requirements of freedom from drift, linearity, and wide range of amplification. The technique has adequate sensitivity for the study of vascular reactions in such limited areas as the tongue, lip, eyelid, skeletal muscle, etc. It is likewise applicable to arteriography.

Photoelectric Plethysmography of the Fingers and Toes in Man

SummaryPhotoelectric plethysmographs for the fingers and toes are described which use electrocardiographs for the recording and which have definite advantages in routine clinical observations on th...

Photoelectric Plethysmography of the Nasal Septum in Man

Advantage has been taken of the fact that the opacity of tissues to light varies with the blood content, to record photoelectrically the changes in the blood content of the nasal septum.The arrangement used (shown schematically in Fig. 1) is essentially an adaptation of the photoelectric plethysmograph for the finger, previously reported.1 Illumination of the septum is provided by a small ophthalmoscope bulb inserted in one nares. Local heating is largely prevented by a heavy metal cap which, placed over the bulb, conducts the heat away to the lamp carrier. Local heating may be practically eliminated by using a mirror arrangement which permits the light source to be placed some distance from the nares. The latter method of providing illumination has the additional advantage of offering opportunity to control amplification, independent of septal luminosity, through predetermined decrements in light intensity by means of suitable filters. The light transmitted by the septum is reflected out the other nares ...