ABSTRACT We have developed a physiological signal platform where presently phonocardiographic (PC... more ABSTRACT We have developed a physiological signal platform where presently phonocardiographic (PCG) and electrocardiographic (ECG) signals can be acquired and on which our signal analysis techniques can be implemented. The platform can also be used to store patient data, to enable comparison over time and invoke distance consultation if necessary. Our studies so far indicate that with our signal analysis techniques of heart sounds we are able to separate normal subject from those with aortic stenosis and mitral insufficiency. Further we are able to identify the third heart sound. The platform is being tested in a primary health care setting.
ABSTRACT Patients with spinal cord injury are prone to develop decubital ulcers, especially aroun... more ABSTRACT Patients with spinal cord injury are prone to develop decubital ulcers, especially around the pelvic girdle and in the buttocks. These ulcers are caused by excessive pressure on the tissues. An established pressure ulcer poses a great medical threat to the patient and treatment is extensive. There-fore, the prevention of pressure ulcers is of major importance. We describe the construction of a technical device that monitors sitting pressures in a wheel chair cushion, and alerts the user when the pressure has maintained a critical level for a period of time long enough to risk tissue damage. The device saves pressure data for later analysis to evaluate the patients’ sitting and unloading behavior. This feature enables study of the effect of pressure relieving wheel chair cushions over long-er periods of time. The device consists of sensor elements (resistive ink based sensels) that sample data at 1 Hz, and hardware that permits storage of data for in excess of one week. Moreover, data can be transmitted via a Bluetooth inter-face for immediate analysis. Efforts have been made to keep costs at a minimum. The current prototype will be used for initial clinical trials to monitor sitting pressure, study patient compliance to unloading schemes, and aid in pressure ulcer prophylaxis.
ABSTRACT Patients with spinal cord injury are prone to develop decubital ulcers, especially aroun... more ABSTRACT Patients with spinal cord injury are prone to develop decubital ulcers, especially around the pelvic girdle and in the buttocks. These ulcers are caused by excessive pressure on the tissues. An established pressure ulcer poses a great medical threat to the patient and treatment is extensive. There-fore, the prevention of pressure ulcers is of major importance. We describe the construction of a technical device that monitors sitting pressures in a wheel chair cushion, and alerts the user when the pressure has maintained a critical level for a period of time long enough to risk tissue damage. The device saves pressure data for later analysis to evaluate the patients’ sitting and unloading behavior. This feature enables study of the effect of pressure relieving wheel chair cushions over long-er periods of time. The device consists of sensor elements (resistive ink based sensels) that sample data at 1 Hz, and hardware that permits storage of data for in excess of one week. Moreover, data can be transmitted via a Bluetooth inter-face for immediate analysis. Efforts have been made to keep costs at a minimum. The current prototype will be used for initial clinical trials to monitor sitting pressure, study patient compliance to unloading schemes, and aid in pressure ulcer prophylaxis.
ABSTRACT We have developed a physiological signal platform where presently phonocardiographic (PC... more ABSTRACT We have developed a physiological signal platform where presently phonocardiographic (PCG) and electrocardiographic (ECG) signals can be acquired and on which our signal analysis techniques can be implemented. The platform can also be used to store patient data, to enable comparison over time and invoke distance consultation if necessary. Our studies so far indicate that with our signal analysis techniques of heart sounds we are able to separate normal subject from those with aortic stenosis and mitral insufficiency. Further we are able to identify the third heart sound. The platform is being tested in a primary health care setting.
Abstract. In the implementation of an archetype-based electronic health record (EHR) environment,... more Abstract. In the implementation of an archetype-based electronic health record (EHR) environment, that applies a REST architecture to openEHR, links to both overviews (including focus points within them) and to specific content items can be expressed as URLs. This has the positive side effect of allowing EHR bookmarking and link sharing in the same way as for normal web pages. Here we describe a secure URL shortener and online bookmark service that has been added to the EHR system. It addresses privacy concerns ...
A lack of open, modular service implementations for openEHR makes it harder for newcomers to expe... more A lack of open, modular service implementations for openEHR makes it harder for newcomers to experiment with and learn about openEHR. We are addressing this in an educational EHR environment (LiU EEE). Some of our approaches are likely of value to other openEHR implementations and may also contribute to the upcoming openEHR service model specifications. The main contribution of this work is the formalization of the openEHR storage, retrieval and version-handling semantics into a Representational State Transfer ( ...
Proceedings of Spie the International Society For Optical Engineering, 2004
ABSTRACT A soft (silicone) probe, containing six light emitting diodes (880 nm) and three photo d... more ABSTRACT A soft (silicone) probe, containing six light emitting diodes (880 nm) and three photo detectors, utilizes photoplethysmography (PPG) to monitor pulsations from the brachialis artery under an occluding cuff during deflation. When the arterial pulse returns, measured by PPG, the corresponding pressure in the cuff is determined. This pressure is assumed to equal the systolic pressure. An assessment trial was performed on 21 patients (9 women and 12 men, aged 27-69) at the Neuro-Intensive care unit. Since the patients were already provided with arterial needles, invasive blood pressure could be used as the reference. By choosing a threshold, for detecting pulses, as a fraction (4%) of the maximum amplitude, the systolic blood pressure was underestimated (-0.57 mmHg, SD 12.1). The range of systolic pressure for the patients was 95.5 - 199.0 mmHg, n=14. The method is promising, but improvements still have to be made in order to improve the technique.
ABSTRACT We have developed a physiological signal platform where presently phonocardiographic (PC... more ABSTRACT We have developed a physiological signal platform where presently phonocardiographic (PCG) and electrocardiographic (ECG) signals can be acquired and on which our signal analysis techniques can be implemented. The platform can also be used to store patient data, to enable comparison over time and invoke distance consultation if necessary. Our studies so far indicate that with our signal analysis techniques of heart sounds we are able to separate normal subject from those with aortic stenosis and mitral insufficiency. Further we are able to identify the third heart sound. The platform is being tested in a primary health care setting.
ABSTRACT Patients with spinal cord injury are prone to develop decubital ulcers, especially aroun... more ABSTRACT Patients with spinal cord injury are prone to develop decubital ulcers, especially around the pelvic girdle and in the buttocks. These ulcers are caused by excessive pressure on the tissues. An established pressure ulcer poses a great medical threat to the patient and treatment is extensive. There-fore, the prevention of pressure ulcers is of major importance. We describe the construction of a technical device that monitors sitting pressures in a wheel chair cushion, and alerts the user when the pressure has maintained a critical level for a period of time long enough to risk tissue damage. The device saves pressure data for later analysis to evaluate the patients’ sitting and unloading behavior. This feature enables study of the effect of pressure relieving wheel chair cushions over long-er periods of time. The device consists of sensor elements (resistive ink based sensels) that sample data at 1 Hz, and hardware that permits storage of data for in excess of one week. Moreover, data can be transmitted via a Bluetooth inter-face for immediate analysis. Efforts have been made to keep costs at a minimum. The current prototype will be used for initial clinical trials to monitor sitting pressure, study patient compliance to unloading schemes, and aid in pressure ulcer prophylaxis.
ABSTRACT Patients with spinal cord injury are prone to develop decubital ulcers, especially aroun... more ABSTRACT Patients with spinal cord injury are prone to develop decubital ulcers, especially around the pelvic girdle and in the buttocks. These ulcers are caused by excessive pressure on the tissues. An established pressure ulcer poses a great medical threat to the patient and treatment is extensive. There-fore, the prevention of pressure ulcers is of major importance. We describe the construction of a technical device that monitors sitting pressures in a wheel chair cushion, and alerts the user when the pressure has maintained a critical level for a period of time long enough to risk tissue damage. The device saves pressure data for later analysis to evaluate the patients’ sitting and unloading behavior. This feature enables study of the effect of pressure relieving wheel chair cushions over long-er periods of time. The device consists of sensor elements (resistive ink based sensels) that sample data at 1 Hz, and hardware that permits storage of data for in excess of one week. Moreover, data can be transmitted via a Bluetooth inter-face for immediate analysis. Efforts have been made to keep costs at a minimum. The current prototype will be used for initial clinical trials to monitor sitting pressure, study patient compliance to unloading schemes, and aid in pressure ulcer prophylaxis.
ABSTRACT We have developed a physiological signal platform where presently phonocardiographic (PC... more ABSTRACT We have developed a physiological signal platform where presently phonocardiographic (PCG) and electrocardiographic (ECG) signals can be acquired and on which our signal analysis techniques can be implemented. The platform can also be used to store patient data, to enable comparison over time and invoke distance consultation if necessary. Our studies so far indicate that with our signal analysis techniques of heart sounds we are able to separate normal subject from those with aortic stenosis and mitral insufficiency. Further we are able to identify the third heart sound. The platform is being tested in a primary health care setting.
Abstract. In the implementation of an archetype-based electronic health record (EHR) environment,... more Abstract. In the implementation of an archetype-based electronic health record (EHR) environment, that applies a REST architecture to openEHR, links to both overviews (including focus points within them) and to specific content items can be expressed as URLs. This has the positive side effect of allowing EHR bookmarking and link sharing in the same way as for normal web pages. Here we describe a secure URL shortener and online bookmark service that has been added to the EHR system. It addresses privacy concerns ...
A lack of open, modular service implementations for openEHR makes it harder for newcomers to expe... more A lack of open, modular service implementations for openEHR makes it harder for newcomers to experiment with and learn about openEHR. We are addressing this in an educational EHR environment (LiU EEE). Some of our approaches are likely of value to other openEHR implementations and may also contribute to the upcoming openEHR service model specifications. The main contribution of this work is the formalization of the openEHR storage, retrieval and version-handling semantics into a Representational State Transfer ( ...
Proceedings of Spie the International Society For Optical Engineering, 2004
ABSTRACT A soft (silicone) probe, containing six light emitting diodes (880 nm) and three photo d... more ABSTRACT A soft (silicone) probe, containing six light emitting diodes (880 nm) and three photo detectors, utilizes photoplethysmography (PPG) to monitor pulsations from the brachialis artery under an occluding cuff during deflation. When the arterial pulse returns, measured by PPG, the corresponding pressure in the cuff is determined. This pressure is assumed to equal the systolic pressure. An assessment trial was performed on 21 patients (9 women and 12 men, aged 27-69) at the Neuro-Intensive care unit. Since the patients were already provided with arterial needles, invasive blood pressure could be used as the reference. By choosing a threshold, for detecting pulses, as a fraction (4%) of the maximum amplitude, the systolic blood pressure was underestimated (-0.57 mmHg, SD 12.1). The range of systolic pressure for the patients was 95.5 - 199.0 mmHg, n=14. The method is promising, but improvements still have to be made in order to improve the technique.
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Papers by Martin Eneling