Design and implementation of a portable physiologic data acquisition system*

Vinecore, Kevin; McNames, James; Phillips, Charles R.; Agbeko, Rachel; Peters, Mark; Ellenby, Miles; McManus, Michael L.; Goldstein, Brahm

doi:10.1097/01.pcc.0000288715.66726.64

Cited by 14 publications

(7 citation statements)

References 27 publications

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“…Physiologic signals and parametric data (digital displays of time-averaged physiologic signals) were recorded continuously, and the timing of protocol or other clinically relevant events was annotated using the Physiologic Data Acquisition System as previously described (21). Physiologic Data Acquisition System sampled and recorded ICP and arterial blood pressure (ABP) waveforms at 125 Hz.…”

Section: Monitoring Devicesmentioning

confidence: 99%

The author replies

Chang¹

2012

Pediatric Critical Care Medicine

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T raumatic brain injury (TBI) is a leading cause of death and disability in children (1). Elevated intracranial pressure (ICP) and reduced cerebral perfusion pressure (CPP) are both associated with worse outcome (2, 3).Even though optimum pediatric ICP and CPP treatment thresholds remain to be determined, an ICP Ͼ20 mm Hg is generally accepted as a threshold for treatment (4), whereas a CPP between 40 and 65 mm Hg is currently advised as an age-related continuum treatment threshold (5).Current treatment for TBI aims to minimize secondary brain injury and increase survival and neurologic outcome by reducing ICP concurrently with max-imizing CPP. For decades, routine treatment of severe pediatric TBI has included maintaining the head in a neutral position with elevation of the head of the bed (HOB) to 30 degrees. The effect of HOB elevation on ICP is attributed to gravity-induced changes in cerebral blood and cerebrospinal fluid volume and to maximizing cerebral venous return (6). A number of clinical trials in adults have quantified the effect of elevating the HOB on ICP, CPP, and, to a lesser extent, cerebral oxygenation (7-17).However, because children differ from adults in physiologic and anatomical characteristics as well as their response to severe TBI, pediatric-specific data are needed (18). Despite years of clinical experience with HOB elevation, little is known of its efficacy in pediatric TBI. One study showed that the optimal (i.e., lowest ICP with highest CPP) HOB elevation in children was actually Ͻ30 degrees in 29% (4 of 14) of the measurements (19), whereas another Objectives: To determine the effect of and dynamic interaction between head elevation on intracranial pressure and cerebral perfusion pressure in severe pediatric traumatic head injury.Design: Prospective, randomized, interventional cohort study. Setting: Two tertiary pediatric critical care referral units. Patients: Ten children admitted with severe traumatic brain injury defined as Glasgow Coma Score <8 necessitating intracranial pressure monitoring (10 yrs ؎ 5 SD; range 2-16 yrs). Interventions: Head elevation was randomly increased or decreased between 0 and 40 degrees from baseline level (30 degrees) in increments or decrements of 10 degrees.Measurements and Main Results: Intracranial pressure and arterial blood pressure were continuously recorded in combination with time-stamped clinical notations. Data were available for analysis in eight subjects (seven males and one female; mean age, 10 yrs ؎ SD 5; range, 2-16 yrs) during 18 protocol sessions. This resulted in a total of 66 head-of-the-bed challenges. To compare results for a given change in head-of-the-bed elevation across age, we transformed head-of-the-bed angle to change in height (cm) at the level of Monro's foramen. An increase in head elevation of 10 cm resulted in an average change in intracranial pressure of ؊3.9 mm Hg (SD ؎3.2 mm Hg; p < .001), whereas cerebral perfusion pressure remained unchanged (0.1 ؎ 5.6 mm Hg; p ‫؍‬ .957). Individual subjects showed marked variabi...

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Section: Monitoring Devicesmentioning

confidence: 99%

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Chang¹

2012

Pediatric Critical Care Medicine

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“…Physiologic signals and parametric data were recorded continuously, and precise annotations were captured regarding the exact timing of protocol events using the Physiologic Data Acquisition System (PDAS) as previously described (9). In many cases, multiple sessions were recorded on different days.…”

Section: Physiologic Signal Data Acquisition and Physiologic Challengmentioning

confidence: 99%

Assessing the prediction potential of an in silico computer model of intracranial pressure dynamics*

Wakeland

Agbeko

Vinecore

et al. 2009

Critical Care Medicine

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“…The system collects analog and RS-232 data from devices and transmits those data to data analyzing computer through either USB or Ethernet ports. The acquisition systems for physiologic signals in ICU environment have also been reported [3][4][5]. Most of them used a portable device that is connected to analog-to-digital board in a personal computer.…”

Section: Introductionmentioning

confidence: 99%

“…Most of them used a portable device that is connected to analog-to-digital board in a personal computer. In paper [5], Kevin et al developed the continuous physiologic data acquisition system (PDAS) for clinical research in the intensive care unit (ICU) environment. The system has successfully recorded physiologic signals with synchronous clinical annotation from 44 subjects with no data transmission error.…”

Section: Introductionmentioning

confidence: 99%

An automatic biomedical acquisition system for hospital registration

Kittipiyakul

Charoenkul

Pornsukjantra

et al. 2011

2011 IEEE Symposium on Industrial Electronics and Applications

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An automatic biomedical acquisition system for hospital registration is proposed. The system consists of the guide system, the acquisition device and the biomedical measuring devices. The guide system installed in control unit facilitates user to interact with the system properly. An acquisition device (Hub) is used to acquire data from attached measuring devices through RS-232 ports and then transfers measured information to the control unit. Several measuring devices are attached to the Hub including the height meter that we have developed based on an ultrasonic sensor. In the experiment section, the accuracies of both the Hub and the height meter were performed. The results showed the excellent transmission reliability of the Hub and the accurate measurement of the height using our height meter.

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Design and implementation of a portable physiologic data acquisition system*

Abstract: The PDAS provides a reliable tool to record physiologic signals and associated clinical events on a second-to-second basis and may serve as an important adjunctive research tool in designing and performing clinical physiologic studies in critical illness and injury.

Cited by 14 publications

References 27 publications

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Assessing the prediction potential of an in silico computer model of intracranial pressure dynamics*

An automatic biomedical acquisition system for hospital registration

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