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Biotelemetry and patient monitoring最新文献

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Controlled transcutaneous powering of a chronically implanted telemetry device. 长期植入遥测装置的经皮控制供电。
Biotelemetry and patient monitoring Pub Date : 1979-01-01
O Y De Vel
{"title":"Controlled transcutaneous powering of a chronically implanted telemetry device.","authors":"O Y De Vel","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Radiofrequency (RF) powered subcutaneous transmitter devices offer the unique possibility of very long-term measurements from sites within the body under a variety of normal living conditions without percutaneous connections and concomitant dangers such as local tissue infection. Disturbances in the energy transport across the cutaneous barrier may, however, give rise to output data signal fluctuations, which are perceived as transients or drift. A RF-powered implanted biotelemetry device is proposed where the energy transport is controlled by continually optimizing the emission frequency and the duration of energy transfer.</p>","PeriodicalId":75603,"journal":{"name":"Biotelemetry and patient monitoring","volume":"6 4","pages":"176-85"},"PeriodicalIF":0.0,"publicationDate":"1979-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11730894","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
Destruction of noise in biotelemetry. 生物遥测中噪声的消除。
Biotelemetry and patient monitoring Pub Date : 1979-01-01
J Fraden
{"title":"Destruction of noise in biotelemetry.","authors":"J Fraden","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The difference in statistical characteristics between physiological signals and noise creates the possibility of designing a selective circuit to separate signals from noise. Analysis shows that by an extremely low signal-to-noise ratio before the pulse conditioner in a biotelemetry system, the mixture of normal and spurious pulses are present at the demodulator input. The system of noise destruction analyzes the sequential distances between two following pulses and blanks all spurious pulses using the criteria of high autocorrelation of physiological signals in short intervals. Evaluation of the circuit demonstrates a dramatic increase in accuracy in the presence of strong interference because the system of noise destruction performs a linear extrapolation of free-of-noise parts of pulse flow into destroyed spaces. The equations to calculate selective thresholds and output errors are delineated. The noise destructor is especially useful in long-term monitoring and automatic data analysis because it prevents a formation of sharp noisy spikes at the biotelemetry system's output.</p>","PeriodicalId":75603,"journal":{"name":"Biotelemetry and patient monitoring","volume":"6 4","pages":"207-21"},"PeriodicalIF":0.0,"publicationDate":"1979-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11730897","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
Totally implantable dimension telemetry. 完全植入尺寸遥测。
Biotelemetry and patient monitoring Pub Date : 1979-01-01
J W Knutti, E Wildi, J D Marshall, H V Allen, J D Meindl
{"title":"Totally implantable dimension telemetry.","authors":"J W Knutti,&nbsp;E Wildi,&nbsp;J D Marshall,&nbsp;H V Allen,&nbsp;J D Meindl","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>A totally implantable dimension telemetry system has been developed to instrument animals for chronic physiological research. Implantable signal processing electronics allow free-roaming animals with no percutaneous leads while retaining the long-term redproducibility of fixed implanted transducers. Two low-powered, custom-integrated circuits have been developed and assembled into an implantable package capable of measuring one dimension channel. The system has been operated in the amplitude modes of through-transmission and reflection as well as in a new Doppler-power configuration and aimed at determining interfaces between blood and surrounding structures. In a addition to single channel systems, these ICs are key elements in multimode, multidimensional implants capable of more accurate characterization of deep body structures.</p>","PeriodicalId":75603,"journal":{"name":"Biotelemetry and patient monitoring","volume":"6 3","pages":"133-46"},"PeriodicalIF":0.0,"publicationDate":"1979-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11378781","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
Synchronization in biotelemetry systems with time division of channels. 信道分时生物遥测系统中的同步。
Biotelemetry and patient monitoring Pub Date : 1979-01-01
J Fraden
{"title":"Synchronization in biotelemetry systems with time division of channels.","authors":"J Fraden","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>In order to improve synchronization in biotelemetry systems, a relative pulse-width selector was designed. It employs a sawtooth generator, sample-and-hold and analogue comparator. The use of this selector creates a possibility of reducing the increase in the synchronizing pulse with respect to the channel pulses and eliminating tuning the transmitter's modulator and receiver's selector to each other. Two different selectors are described: a simple one for two different pulse widths and a more complicated one with a counter for any setting of pulse width in the system.</p>","PeriodicalId":75603,"journal":{"name":"Biotelemetry and patient monitoring","volume":"6 4","pages":"192-9"},"PeriodicalIF":0.0,"publicationDate":"1979-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11730896","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
Continuous measurement of arterial PO2. Significance and indications in intensive care. 连续测量动脉PO2。重症监护的意义和适应证。
Biotelemetry and patient monitoring Pub Date : 1979-01-01
G Goeckenjan
{"title":"Continuous measurement of arterial PO2. Significance and indications in intensive care.","authors":"G Goeckenjan","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The use of continuous arterial PO2 monitoring with the aid of intra-arterial electrodes is discussed with reference to 50 patients in an intensive care unit specializing in internal medicine. Monitoring time ranged from 2 h to 15 days. There were no serious complications which could, with certainty, be attributed to the intravascular measurement of PO2. The advantages of this method lie particularly in the early detection of hypoxemias, in the uninterrupted monitoring of artificial respiration and in the immediate indication of favorable and unfavorable response to therapy. Finally, a list is given of possible indications in which this method can be used in intensive medicine.</p>","PeriodicalId":75603,"journal":{"name":"Biotelemetry and patient monitoring","volume":"6 1-2","pages":"51-65"},"PeriodicalIF":0.0,"publicationDate":"1979-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11691564","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
Activity monitoring in chronic illness: time out of bed for tetraplegics during comprehensive rehabilitation. 慢性疾病的活动监测:全面康复期间四肢瘫痪患者的下床时间。
Biotelemetry and patient monitoring Pub Date : 1978-01-01
L S Halstead
{"title":"Activity monitoring in chronic illness: time out of bed for tetraplegics during comprehensive rehabilitation.","authors":"L S Halstead","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Unobtrusive longitudinal monitoring of what patients actually do during comprehensive rehabilitation represents a relatively unexplored but potentially very useful approach to functional evaluation. Recent advances in biomedical technology have created the possibility of supplementing and/or substituting a number of human observations with instrument-based measurements. This paper presents the first data obtained as part of a systematic research effort to explore the feasibility and utility of applying unobtrusive instrumentation to monitor selected patient activities over extended periods of time. The target activity studied was time out of bed for 36 spinal cord injury patients undergoing comprehensive rehabilitation. Measurements were made with a Rest Time Monitor (RTM) which provides a continuous, objective record of when a patient is out of bed, how often and for how long. Based on this experience, a 'standard' activity curve has been developed which is used as a reference in assessing the weekly progress of individual patients. Distinctive types of activity patterns are described in relation to how patients do clinically, and functionally during hospitalization and 12 months after discharge. In addition, data are presented which compare in-hospital activity patterns by level of injury, age and presence or absence of complications. This initial study suggests that longitudinal activity monitoring is a useful tool for clinical assessment and management and may help predict those patients who are most likely to develop pre- and postdischarge complications.</p>","PeriodicalId":75603,"journal":{"name":"Biotelemetry and patient monitoring","volume":"5 2","pages":"77-87"},"PeriodicalIF":0.0,"publicationDate":"1978-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11938077","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
Telemetry of intracranial pressure. 遥测颅内压。
Biotelemetry and patient monitoring Pub Date : 1978-01-01
T B Fryer, S D Corbin, G D Silverberg, E V Schmidt, A K Ream
{"title":"Telemetry of intracranial pressure.","authors":"T B Fryer,&nbsp;S D Corbin,&nbsp;G D Silverberg,&nbsp;E V Schmidt,&nbsp;A K Ream","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>In the care of patients with abnormal intracranial pressure, it is important to continuously and accurately measure the intracranial pressure so that treatment can be instituted. Strain gage pressure cells have successfully replaced the open-end manometer for chronic use but have lacked the stability for accurate long-term measurements. The system described uses a capacitive pressure transducer with excellent long-term stability. The transducer, electronics, and transmitter package can be implanted to telemeter the pressure transcutaneously, reducing the danger of infection by the elimination of transcutaneous leads. The pressure modulates the frequency of an oscillator in the 8-10 MHz region and provides an easily telemetered signal. To eliminate the problems of periodic battery replacement, the system is energized inductively by a coil placed externally over the implant device, so that the operating life is virtually unlimited.</p>","PeriodicalId":75603,"journal":{"name":"Biotelemetry and patient monitoring","volume":"5 2","pages":"88-112"},"PeriodicalIF":0.0,"publicationDate":"1978-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11938078","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 portable infusion pump, programmable with 16 rates. 便携式输液泵，可编程16率。
Biotelemetry and patient monitoring Pub Date : 1978-01-01
J Bojsen, K Kølendorf, F Haslev, K Jørgensen
{"title":"A portable infusion pump, programmable with 16 rates.","authors":"J Bojsen,&nbsp;K Kølendorf,&nbsp;F Haslev,&nbsp;K Jørgensen","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>An external, portable, programmable infusion pump has been developed for long-term therapeutic intravenous infusion of drugs. The impulse-controlled system consists of a 250 g CMOS-electronic unit, and an electromechanical infuser (250 g) containing a 10-ml disposable syringe. The infusion rate pattern is manually preprogrammed from 24 to 384 microliter/0.5 h. The coefficient of variation of the volume infused is less than 2% per. 0.5 h. The system has been tested by continuous administration of insulin in diabetics during 4 consecutive days, and can operate for 6-7 days with a 1 Ah, 5.4 V battery. The mean capillary blood glucose concentration could be maintained at levels close to normal (i.e. 7.0 mmol/1 +/- 2.3 (SD)) during the treatment period.</p>","PeriodicalId":75603,"journal":{"name":"Biotelemetry and patient monitoring","volume":"5 3","pages":"123-33"},"PeriodicalIF":0.0,"publicationDate":"1978-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11954437","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
Arrhythmias in ambulatory persons. A review and experience of 1,000 consecutive recordings. 流动人员的心律失常。1000个连续录音的回顾和经验。
Biotelemetry and patient monitoring Pub Date : 1978-01-01
A J Camm, D E Ward, R A Spurrell
{"title":"Arrhythmias in ambulatory persons. A review and experience of 1,000 consecutive recordings.","authors":"A J Camm,&nbsp;D E Ward,&nbsp;R A Spurrell","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The value of 24-hour ambulatory monitoring of the ECG for the diagnosis of symptoms of dizziness, palpitations and syncope is controversial. In this study results from a hospital-based, clinical service have been analysed. Of 1,000 consecutive dynamic electrocardiograms (DCG), 678 were performed for assessment of dizziness, syncope or palpitations in 405 patients. 36 of the patients had pacemakers. 60 DCGs were technically inadequate. The recordings were classified according to the correspondence between DCG findings and symptoms noted in the patient diary: (I) Completely diagnostic: significant arrhythmias (SA) corresponding to diary symptoms - 99 recordings. (II) Incompletely diagnostic: (a) absence of SA in the presence of diary symptoms - 90 recordings; (b) presence of SA but no diary symptoms - 197 recordings; (c) presence of SA corresponding to symptoms other than that for which the DCG was indicated - 52 recordings. (III) Non-diagnostic: absence of both SA and diary symptoms - 180 recordings. Incompletely diagnostic categories were regarded as clinically valuable in that they either excluded a cardiac arrhythmia as a cause of symptoms (group IIa) or they revealed SA which did not correspond to diary symptoms (group IIc). The absence of symptoms corresponding to SA was ascribed to poor diary keeping in 54 of 197 recordings. These results are discussed in the context of the findings in normal and symptomatic patients. A clinical 24-hour ambulatory ECG monitoring service provided useful diagnostic information in 65% of recordings and 74% of patients.</p>","PeriodicalId":75603,"journal":{"name":"Biotelemetry and patient monitoring","volume":"5 4","pages":"167-81"},"PeriodicalIF":0.0,"publicationDate":"1978-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11955358","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 trends in human eye blink rate. 人类眨眼频率的长期趋势。
Biotelemetry and patient monitoring Pub Date : 1978-01-01
A W Monster, H C Chan, D O'Connor
{"title":"Long-term trends in human eye blink rate.","authors":"A W Monster,&nbsp;H C Chan,&nbsp;D O'Connor","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Long-term recordings of normal human eye blink behavior (up to 14 h continuously) showed a number of periodic trends in blink rate. Mean rates varied from 2 to 50 blinks/min and periods ranged from 10 min to 2.5 h. Three dominant groupings of mean rates were observed (1) under 6, (2) 8--15 and (3) 20--30 blinks/min; these groups appear to be related to more or less distinct behavioral states of the individual. Blink amplitudes also varied and amplitude and rate showed correlations of possible functional significance. Vision-related behaviors affect both the mean rate of blinking and blink amplitude, and may impose a characteristic strategy on the timing of the individual blinks as well. The latter is referred to as bimodal blinking; this strategy contrasts with the random occurrence of blinks seen normally.</p>","PeriodicalId":75603,"journal":{"name":"Biotelemetry and patient monitoring","volume":"5 4","pages":"206-22"},"PeriodicalIF":0.0,"publicationDate":"1978-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11955361","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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