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Biotelemetry and patient monitoring最新文献

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Distortions in the ECG caused by instruments for ambulatory electrocardiography. 由动态心电图仪引起的心电图畸变。
Biotelemetry and patient monitoring Pub Date : 1980-01-01
P Bjerregaard
{"title":"Distortions in the ECG caused by instruments for ambulatory electrocardiography.","authors":"P Bjerregaard","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The frequency response and speed stability of a widely used tape recorder (Oxford Medilog) and arrhythmia computer (Reynolds Pathfinder) was evaluated and measurement in time and amplitude on the ambulatory ECG compared with correspondent measurement in the conventional ECG. The overall bandwidth was 0.15--33Hz (3 dB down) and the mean speed error +2% +/- 1.8%. There was no statistically significant difference between P-Q and Q-T intervals measured by the 2 methods, but a significant reduction in wave amplitudes in the ambulatory ECG. The demarcation of QRS complexes was often blurred in the ambulatory ECG and borderline complexes difficult to classify as normal or abnormal on QRS width alone. Artifical J point depression was a common finding in the ambulatory ECT, whereas horizontal or downsloping ST segment depression was faithfully reproduced.</p>","PeriodicalId":75603,"journal":{"name":"Biotelemetry and patient monitoring","volume":"7 2","pages":"83-95"},"PeriodicalIF":0.0,"publicationDate":"1980-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18428738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Properties of a combined sensor for dynamic measurement of oxygen in simulated respiration. 一种用于模拟呼吸中氧气动态测量的组合传感器的特性。
Biotelemetry and patient monitoring Pub Date : 1980-01-01
G Küchler, W Wagner, I Wolburg
{"title":"Properties of a combined sensor for dynamic measurement of oxygen in simulated respiration.","authors":"G Küchler,&nbsp;W Wagner,&nbsp;I Wolburg","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>A combined sensor supplying momentary values of respiratory functions (flow, PO2, and temperature) for calculation of oxygen intake is tested in simulated respiration. Signal conditioning reduces the errors caused by the influence of CO2 on the sensitivity of the oxygen electrode, by the electrode response and time lag. Oxygen intake of 0.38 and 1.49 liters/min simulated by injection of N2 into the respiration pump (10--40 cycles/min) is analyzed by means of the combined sensor (signals conditioned; time constant about 40 msec) and calculated with a mean error of about -10%. The error rises with increase of the time constant as well as the respiration frequence.</p>","PeriodicalId":75603,"journal":{"name":"Biotelemetry and patient monitoring","volume":"7 2","pages":"122-30"},"PeriodicalIF":0.0,"publicationDate":"1980-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17826913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Seven-electrode EER stimulator-monitor for ambulatory monkeys. 动态猴子的七电极EER刺激器监测仪。
Biotelemetry and patient monitoring Pub Date : 1980-01-01
S Deutsch
{"title":"Seven-electrode EER stimulator-monitor for ambulatory monkeys.","authors":"S Deutsch","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>An electrical evoked response (EER) stimulator-monitor for ambulatory monkeys is described. Seven time-multiplexed electrodes are used. The unit switches between stimulus and monitor modes at a 100-Hz rate. In the stimulus mode, 3.5 V peak, 0.45-ms pulses are applied at a 100-Hz rate to any electrode selected by means of toggle switches on a remote control panel. In the monitor mode, low-frequency -3 dB cutoff occurs at 0.2 Hz. A 20-MHz carrier is used as a local superheterodyne oscillator during the stimulus period, and as an FM transmitter during the monitor period. Three mercury cells supply 4 V at 10 mA. The unit weighs 80 g. It is 5.7 x 5 x 2.5 cm in size.</p>","PeriodicalId":75603,"journal":{"name":"Biotelemetry and patient monitoring","volume":"7 3-4","pages":"231-41"},"PeriodicalIF":0.0,"publicationDate":"1980-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17836042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Blood pressure variability in 'labile' and 'established' hypertension. “不稳定”和“既定”高血压的血压变异性。
Biotelemetry and patient monitoring Pub Date : 1980-01-01
A C Pessina, A Semplicini, P Palatini, P Mormino, E Casiglia, M Hlede, C Dal Palu'
{"title":"Blood pressure variability in 'labile' and 'established' hypertension.","authors":"A C Pessina,&nbsp;A Semplicini,&nbsp;P Palatini,&nbsp;P Mormino,&nbsp;E Casiglia,&nbsp;M Hlede,&nbsp;C Dal Palu'","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Blood pressure variability over a 24-hour period was compared between subjects with labile and those with established hypertension. For this purpose, a computer analysis of the blood pressure tracings, obtained with continuous unrestricted monitoring, was adopted, which characterizes the blood pressure variability in a quantitative manner. The following parameters were employed: the mean, the standard deviation, the coefficient of variation, the indexes of skewness and of kurtosis. No significant differences could be found between the two groups except for the mean value of the blood pressure. It is concluded, therefore, that the term 'labile hypertension' in inappropriate.</p>","PeriodicalId":75603,"journal":{"name":"Biotelemetry and patient monitoring","volume":"7 2","pages":"96-103"},"PeriodicalIF":0.0,"publicationDate":"1980-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18428739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A two-channel radiotelemetry system for clinical fetal monitoring. 一种用于临床胎儿监测的双通道无线遥测系统。
Biotelemetry and patient monitoring Pub Date : 1980-01-01
M R Neuman, E O'Connor
{"title":"A two-channel radiotelemetry system for clinical fetal monitoring.","authors":"M R Neuman,&nbsp;E O'Connor","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>A radiotelemetry system for monitoring fetal heart rate and uterine contractions during labor has been developed and evaluated. The two-channel transmitter utilizes a miniature intrauterine pressure sensor which frequency modulates a subcarrier. The fetal electrocardiogram picked up by a scalp electrode is summed with the subcarrier and this direct frequency modulates the RF carrier. The transmitter has been constructed in a miniature package using conventional electronic components. A receiver system which obtains the original signals and feeds them to a conventional fetal monitor has been developed for use with this transmitter. Clinical evaluation has shown the telemetry system to provide efficacious signals.</p>","PeriodicalId":75603,"journal":{"name":"Biotelemetry and patient monitoring","volume":"7 2","pages":"104-21"},"PeriodicalIF":0.0,"publicationDate":"1980-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18428735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A biotelemetry system for monitoring heart rates in unrestrained ungulates. 一种监测无约束有蹄类动物心率的生物遥测系统。
Biotelemetry and patient monitoring Pub Date : 1980-01-01
R H Johnston, R A MacArthur, V Geist
{"title":"A biotelemetry system for monitoring heart rates in unrestrained ungulates.","authors":"R H Johnston,&nbsp;R A MacArthur,&nbsp;V Geist","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>An EKG telemetry system has been designed for use on free-living ungulates. An FM transmitter with a battery life of 2 +/-0.5 months and a range of 2-6 km is mounted on the back of the animal by means of an adjustable harness. The EKG signal is detected by subdermal electrodes overlying the sternum and transmitted to an FM receiver equipped with a frequency down-converter. The output of the receiver is the modulated audio carrier which is recorded on magnetic tape. The EKG waveform is recovered from the tape-recorded signal using an FM demodulator connected to a strip chart recorder.</p>","PeriodicalId":75603,"journal":{"name":"Biotelemetry and patient monitoring","volume":"7 3-4","pages":"188-98"},"PeriodicalIF":0.0,"publicationDate":"1980-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18228917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Assessment of the diagnostic value of 24-hour ambulatory electrocardiographic monitoring. 24小时动态心电图监测诊断价值的评价。
Biotelemetry and patient monitoring Pub Date : 1980-01-01
D E Ward, A J Camm, N Darby
{"title":"Assessment of the diagnostic value of 24-hour ambulatory electrocardiographic monitoring.","authors":"D E Ward,&nbsp;A J Camm,&nbsp;N Darby","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>During the 1st year of operation of a national 24-hour ambulatory ECG-monitoring service, 531 recordings were collected. The information from these recordings and accompanying patient diaries were classified according to the indication for monitoring, the presence or absence of the 'indicated' sympton or other symptom in the diary and the presence or absence of correlating arrhythmias on the tape. On the basis of this categorization 7.5% of recordings were considered completely diagnostic (indicated symptom noted in diary with correlating arrhythmias). An additional 26.6% or recordings, although not completely diagnostic, were considered clinically useful in that they provided information regarding the relationship of symptoms to arrhythmias or the presence or absence of arrhythmias. Major causes of loss of information were poorly completed diaries or no diary, lack of precise definition of the indication for monitoring and technical faults resulting in uninterpretable recordings. Rectification of these deficiences could improve the efficiency of data collection and analysis.</p>","PeriodicalId":75603,"journal":{"name":"Biotelemetry and patient monitoring","volume":"7 2","pages":"57-66"},"PeriodicalIF":0.0,"publicationDate":"1980-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18428736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Intraperitoneal transmitters in suckling white-footed mice, Peromyscus leucopus. 白足幼鼠的腹腔内递质。
Biotelemetry and patient monitoring Pub Date : 1980-01-01
H R Smith
{"title":"Intraperitoneal transmitters in suckling white-footed mice, Peromyscus leucopus.","authors":"H R Smith","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Intraperitoneal transmitter implantation in suckling white-footed mice, Peromyscus leucopus, was studied. Postnatal morphological development varied. Age ranged from 9 to 16 days, and body weight ranged from 4.4 to 7.3 g. Interference by mothers prevented successful implantation on sucklings which retained their neonatal appearance. Growth was measured in 6 sucklings for 21 days. Observed growth rates based on daily weight gain per 24 h were 0.29 and 0.32 g for implanted and control mice, respectively. Transmitter implantation resulted in a significant short-term weight loss (mean = 0.56 g) which was recouped prior to weaning. There was no evidence of impaired coordination or locomotor disability. This study concluded that intraperitoneal implantation is possible in suckling P. leucopus if surgery is delayed until venter pelage has developed sufficiently and eyes have been open at least 2 days. A few implications of using this technique to radio track small mammals are suggested.</p>","PeriodicalId":75603,"journal":{"name":"Biotelemetry and patient monitoring","volume":"7 3-4","pages":"221-30"},"PeriodicalIF":0.0,"publicationDate":"1980-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18228920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Long-term ambulatory physiological surveillance equiment (LAPSE). 长期动态生理监测设备(LAPSE)。
Biotelemetry and patient monitoring Pub Date : 1980-01-01
T G Grassie, B Karagozoglu, J MacGregor
{"title":"Long-term ambulatory physiological surveillance equiment (LAPSE).","authors":"T G Grassie,&nbsp;B Karagozoglu,&nbsp;J MacGregor","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>A system is described for the acquisition of physiological data for up to 24-hour periods in the ambulant subject free to undertake his usual daily activities. ECG and trunk acceleration signals are recorded on a small analogue magnetic tape recorder along with a stable time-reference. The standard C120 tape cassette used in the recorder is replayed at 60 times the recording speed and the recovered data automatically processed to yield outputs which describe the instantaneous heart rate response of the subject to particular activity. The system is evaluated and the potential indicated by examples of clinical application.</p>","PeriodicalId":75603,"journal":{"name":"Biotelemetry and patient monitoring","volume":"7 2","pages":"67-82"},"PeriodicalIF":0.0,"publicationDate":"1980-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18428737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Heart rate, multiple body temperature, long-range and long-life telemetry system for free-ranging animals. 自由放养动物心率、多重体温、远距离、长寿命遥测系统。
Biotelemetry and patient monitoring Pub Date : 1980-01-01
G F Lund, R M Westbrook, T B Fryer
{"title":"Heart rate, multiple body temperature, long-range and long-life telemetry system for free-ranging animals.","authors":"G F Lund,&nbsp;R M Westbrook,&nbsp;T B Fryer","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>A long-range and long-life telemetry system for heart rate and multiple body temperatures from free-ranging animals is described. This system includes an implantable transmitter, external receiver-retransmitter collar, and a signal conditioner interface circuit to assist in demodulation of receiver tone outputs before data processing. The size of the implant is suitable for animals with body weights of a few kilograms or more; further size reduction of the implant is possible. The ECG is sensed by electrodes designed for internal telemetry and to reduce movement artifacts. The R-wave characteristics are then specifically selected to trigger a short radio frequency pulse. Temperatures are sensed at desired locations by thermistors and then, based on a heart-beat counter, transmitted intermittently via pulse interval modulation. This modulation scheme includes first and last calibration intervals for a reference by ratios with the temperature intervals for as much as a range of 0-50 degrees C with a resolution of 0.1 degrees C. Pulse duration and pulse sequencing are used to discriminate between heart rate and temperature pulses as well as radio frequency interference. The implanted transmitter might be used alone for experiments on animals that frequent particular locations within a large territory, on animals in virtually any laboratory situation, or on animals in moderate-sized enclosures, such as those in a zoological garden. The implanted transmitter is otherwise interfaced with the receiver-retransmitter collar that employs commercial tracking equipment to achieve the long-range transmission. The objective of the design was to achieve a high degree of experimental flexibility and overall high quality in performance. The system was tested in prototype form on a dog.</p>","PeriodicalId":75603,"journal":{"name":"Biotelemetry and patient monitoring","volume":"7 3-4","pages":"137-7"},"PeriodicalIF":0.0,"publicationDate":"1980-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18228915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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