The Experts below are selected from a list of 657 Experts worldwide ranked by ideXlab platform
Shinji Yamamori - One of the best experts on this subject based on the ideXlab platform.
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EMBC - Development of respiratory function monitor for neonates
2017 39th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2017Co-Authors: Fumihiko Takatori, Shinichiro Inoue, Satoru Togo, Shinji YamamoriAbstract:Approximately, 10 million babies do not breathe immediately at birth and some of them require positive pressure ventilation. However, inappropriate and excessive tidal volume delivery could lead to lung injury in neonatal patients. We developed a respiratory function monitor which can monitor mask leak, expiratory tidal volume, respiratory rate, peak inspiratory pressure, and end-tidal CO 2 on a real-time basis. A neonatal flow sensor was specially designed and was integrated with a small mainstream Capnometer, cap-ONE. Usability was enhanced by using a tablet for the display of the monitored parameters. The basic performance evaluation using a neonatal training test lung shows that the respiratory function monitor effectively detects mask leak. The system may help healthcare providers to efficiently support neonatal patients start breathing.
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A novel mainstream Capnometer system for polysomnography integrated with measurement of nasal pressure and thermal airflow
2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2014Co-Authors: Kota Saeki, Fumihiko Takatori, Masayuki Inoue, Yuya Baba, Naoki Kobayashi, Shinji YamamoriAbstract:Capnometry is a method to measure carbon dioxide (CO2) in exhaled gas and its use during polysomnography (PSG) for diagnostic of sleep apnea-hypopnea syndrome is expanding. However, some problems exist for using Capnometer in combination with other respiratory monitoring devices because capnometry requires additional sampling cannula or airway adapter attached to patients. To resolve these problems, we developed a novel mainstream Capnometer system for PSG, which is designed to integrate multiple devices for measuring respiratory parameters. This system may provide comfortable and stable PSG including capnometry. We evaluated the basic performance of this system using a spontaneous breathing model. The result indicates that this newly developed system works adequately in PSG and moreover has superior characteristics of capnography signal and measurement stability against displacement of sensors, compared to conventional devices.
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EMBC - A novel mainstream Capnometer system for polysomnography integrated with measurement of nasal pressure and thermal airflow.
2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2014Co-Authors: Kota Saeki, Fumihiko Takatori, Masayuki Inoue, Yuya Baba, Naoki Kobayashi, Shinji YamamoriAbstract:Capnometry is a method to measure carbon dioxide (CO(2)) in exhaled gas and its use during polysomnography (PSG) for diagnostic of sleep apnea-hypopnea syndrome is expanding. However, some problems exist for using Capnometer in combination with other respiratory monitoring devices because capnometry requires additional sampling cannula or airway adapter attached to patients. To resolve these problems, we developed a novel mainstream Capnometer system for PSG, which is designed to integrate multiple devices for measuring respiratory parameters. This system may provide comfortable and stable PSG including capnometry. We evaluated the basic performance of this system using a spontaneous breathing model. The result indicates that this newly developed system works adequately in PSG and moreover has superior characteristics of capnography signal and measurement stability against displacement of sensors, compared to conventional devices.
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A novel mainstream Capnometer system for non-intubated pediatric patients requiring oxygen administration
2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2011Co-Authors: Fumihiko Takatori, Shinji Yamamori, Masayuki Inoue, Katsuyuki MiyasakaAbstract:Capnometer has been widely used as a respiratory monitor. Stable carbon dioxide (CO2) monitoring of non-intubated patient is especially problematic due to the frequent occurrence of tube obstruction and it could be even more difficult when oxygen is being administered. Oxygen is often administered by an oxygen mask or oxygen nasal cannula; however there are some problems with these methods. For oxygen masks, it is necessary to provide high-flow oxygen to prevent rebreathing of exhaled CO2, and as for oxygen nasal cannula, it is incapable of increasing the oxygen concentration and patient may feel uncomfortable during oxygen administration because it could dry nasal mucous. To solve these problems, we developed a novel mainstream Capnometer system, which provides stable monitoring of exhaled CO2 while administering oxygen. This Capnometer system has a mask with an opening large enough to facilitate the observation of patient's nose and mouth and the procedures such as daily oral care. Furthermore, the outer rim of the mask is designed to effectively retain oxygen flow without causing rebreathing.
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EMBC - A novel mainstream Capnometer system for non-intubated pediatric patients requiring oxygen administration
2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2011Co-Authors: Fumihiko Takatori, Shinji Yamamori, Masayuki Inoue, Seiki Abe, Katsuyuki MiyasakaAbstract:Capnometer has been widely used as a respiratory monitor. Stable carbon dioxide (CO 2 ) monitoring of non-intubated patient is especially problematic due to the frequent occurrence of tube obstruction and it could be even more difficult when oxygen is being administered. Oxygen is often administered by an oxygen mask or oxygen nasal cannula; however there are some problems with these methods. For oxygen masks, it is necessary to provide high-flow oxygen to prevent rebreathing of exhaled CO 2 , and as for oxygen nasal cannula, it is incapable of increasing the oxygen concentration and patient may feel uncomfortable during oxygen administration because it could dry nasal mucous. To solve these problems, we developed a novel mainstream Capnometer system, which provides stable monitoring of exhaled CO 2 while administering oxygen. This Capnometer system has a mask with an opening large enough to facilitate the observation of patient's nose and mouth and the procedures such as daily oral care. Furthermore, the outer rim of the mask is designed to effectively retain oxygen flow without causing rebreathing.
Fumihiko Takatori - One of the best experts on this subject based on the ideXlab platform.
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A Novel Nasal Cannula Type Mainstream Capnometer System Capable of Oxygen Administration
2020 42nd Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC), 2020Co-Authors: Takayuki Aoyagi, Fumihiko Takatori, Kenichiro Kabumoto, Masayuki InoueAbstract:Capnometry is a method to measure carbon dioxide (CO2) in exhaled gas and has been used to monitor patient’s respiratory status. During moderate or deep sedation, monitoring for the presence of exhaled CO2 is recommended for evaluating the adequacy of ventilation. Oxygen administration is usually given to patients with a nasal cannula to avoid hypoxia during sedation. However, the flow of oxygen administration can interfere with CO2 measurement. We developed a nasal cannula type adapter called cap-ONE nasal adapter system based on the mainstream capnography which is designed to monitor CO2 while supplying oxygen. In this study, we evaluated the basic performance of the system as compared with a conventional device using a spontaneous breathing model. The cap-ONE nasal adapter system could accurately measure PetCO2 without being disturbed by oxygen flow and efficiently supply oxygen.
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a novel mainstream Capnometer system for non invasive positive pressure ventilation
International Conference of the IEEE Engineering in Medicine and Biology Society, 2020Co-Authors: Yuya Baba, Fumihiko Takatori, Masayuki Inoue, Isao MatsubaraAbstract:Capnometry is a method to measure carbon dioxide (CO 2 ) in exhaled gas and it has been used to monitor patient respiratory status. CO 2 monitoring is also used for patients receiving non-invasive positive pressure ventilation (NPPV) therapy during mechanical ventilation. Ventilators actively dilute exhaled gas during non-invasive ventilation. In order to accurately measure end-tidal CO 2 , an adequate amount of expired gas needs to be filled in a CO 2 measurement cell before expiratory positive airway pressure (EPAP) gas from the ventilator arrives to the cell. This is the reason why it is difficult to measure CO 2 stably during non-invasive ventilation using the conventional CO 2 measurement method. Therefore, we developed NPPV cap-ONE mask, which accurately measures CO 2 in exhaled gas during non-invasive ventilation. In this study, we evaluated the basic performance of the NPPV cap-ONE mask system. The NPPV cap-ONE mask system could accurately measure CO 2 in exhaled gas comparing to the conventional device in this study.
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EMBC - A Novel Mainstream Capnometer System for Non-invasive Positive Pressure Ventilation
2020 42nd Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC), 2020Co-Authors: Yuya Baba, Fumihiko Takatori, Masayuki Inoue, Isao MatsubaraAbstract:Capnometry is a method to measure carbon dioxide (CO 2 ) in exhaled gas and it has been used to monitor patient respiratory status. CO 2 monitoring is also used for patients receiving non-invasive positive pressure ventilation (NPPV) therapy during mechanical ventilation. Ventilators actively dilute exhaled gas during non-invasive ventilation. In order to accurately measure end-tidal CO 2 , an adequate amount of expired gas needs to be filled in a CO 2 measurement cell before expiratory positive airway pressure (EPAP) gas from the ventilator arrives to the cell. This is the reason why it is difficult to measure CO 2 stably during non-invasive ventilation using the conventional CO 2 measurement method. Therefore, we developed NPPV cap-ONE mask, which accurately measures CO 2 in exhaled gas during non-invasive ventilation. In this study, we evaluated the basic performance of the NPPV cap-ONE mask system. The NPPV cap-ONE mask system could accurately measure CO 2 in exhaled gas comparing to the conventional device in this study.
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a novel mainstream Capnometer system for endoscopy delivering oxygen
International Conference of the IEEE Engineering in Medicine and Biology Society, 2017Co-Authors: Kenichiro Kabumoto, Fumihiko Takatori, Masayuki InoueAbstract:Capnometry is a method to measure carbon dioxide (CO 2 ) in exhaled gas and it has been used in patients to monitor their respiratory status. Monitoring of exhaled CO 2 during endoscopic procedures has been shown to be effective in detecting drug-induced respiratory depression. Oxygen (O 2 ) supplementation is given to patients to abolish hypoxia during endoscopy. However, oxygen administration can interfere with CO2 measurement owing to oxygen flow. Therefore, we developed cap-ONE Biteblock for patients undergoing endoscopy with oxygen supply to measure CO 2 accurately. In this study we evaluated the basic performance of cap-ONE Biteblock. The cap-ONE Biteblock system could accurately measure CO 2 and efficiently supply O 2 comparing to conventional devices via a bench study.
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EMBC - A novel mainstream Capnometer system for endoscopy delivering oxygen
2017 39th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2017Co-Authors: Kenichiro Kabumoto, Fumihiko Takatori, Masayuki InoueAbstract:Capnometry is a method to measure carbon dioxide (CO 2 ) in exhaled gas and it has been used in patients to monitor their respiratory status. Monitoring of exhaled CO 2 during endoscopic procedures has been shown to be effective in detecting drug-induced respiratory depression. Oxygen (O 2 ) supplementation is given to patients to abolish hypoxia during endoscopy. However, oxygen administration can interfere with CO2 measurement owing to oxygen flow. Therefore, we developed cap-ONE Biteblock for patients undergoing endoscopy with oxygen supply to measure CO 2 accurately. In this study we evaluated the basic performance of cap-ONE Biteblock. The cap-ONE Biteblock system could accurately measure CO 2 and efficiently supply O 2 comparing to conventional devices via a bench study.
Matthew T. V. Chan - One of the best experts on this subject based on the ideXlab platform.
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Mainstream vs. sidestream capnometry for prediction of arterial carbon dioxide tension during supine craniotomy.
Anaesthesia, 2003Co-Authors: K. L. Chan, Matthew T. V. ChanAbstract:Summary We compared the performance of mainstream capnometry as a measure of arterial carbon dioxide tension (Paco2) with sidestream recordings in adult neurosurgical patients undergoing supine craniotomy. Two hundred and forty patients were randomly assigned so that the end-tidal carbon dioxide tension (PEco2) was measured using either a mainstream or sidestream infrared Capnometer. All patients received propofol anaesthesia and ventilation was adjusted according to clinical requirement. Arterial blood gas analyses were performed after induction, prior to dural incision, during surgery and before wound closure. Simultaneous haemodynamic and ventilatory parameters were also recorded. For 1007 paired measurements of PEco2 and Paco2 (mainstream, n = 503; sidestream, n = 504), the mean (SD) mainstream arterial to end-tidal carbon dioxide tension difference, 0.64 (0.16) kPa, was smaller than the corresponding sidestream values, 0.99 (0.40) kPa (p
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mainstream vs sidestream capnometry for prediction of arterial carbon dioxide tension during supine craniotomy
Anaesthesia, 2003Co-Authors: K. L. Chan, Matthew T. V. ChanAbstract:Summary We compared the performance of mainstream capnometry as a measure of arterial carbon dioxide tension (Paco2) with sidestream recordings in adult neurosurgical patients undergoing supine craniotomy. Two hundred and forty patients were randomly assigned so that the end-tidal carbon dioxide tension (PEco2) was measured using either a mainstream or sidestream infrared Capnometer. All patients received propofol anaesthesia and ventilation was adjusted according to clinical requirement. Arterial blood gas analyses were performed after induction, prior to dural incision, during surgery and before wound closure. Simultaneous haemodynamic and ventilatory parameters were also recorded. For 1007 paired measurements of PEco2 and Paco2 (mainstream, n = 503; sidestream, n = 504), the mean (SD) mainstream arterial to end-tidal carbon dioxide tension difference, 0.64 (0.16) kPa, was smaller than the corresponding sidestream values, 0.99 (0.40) kPa (p < 0.001). The limits of agreement for the mainstream analyser, 0.32–0.96 kPa, were also narrower than the sidestream recordings, 0.19–1.79 kPa (p < 0.001). In both Capnometers, the arterial to end-tidal difference in carbon dioxide tension did not change with time. However, there was greater within-patient variation in the sidestream group. Our study showed that mainstream PEco2 provided a more accurate estimation of Paco2 than sidestream measurement.
G Torri - One of the best experts on this subject based on the ideXlab platform.
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End tidal carbon dioxide monitoring in spontaneously breathing, nonintubated patients. A clinical comparison between conventional sidestream and microstream Capnometers.
Minerva anestesiologica, 2001Co-Authors: A Casati, G Gallioli, R Passaretta, M Scandroglio, E Bignami, G TorriAbstract:To evaluate the end tidal carbon dioxide estimation in nonintubated, spontaneously breathing patients using either conventional sidestream or microstream Capnometers. Patients received a regional anesthesia technique, while the end tidal carbon dioxide partial pressure (EtCO2) was sampled through a nasal cannula (Nasal FilterLine, Nellcor, Plesanton, CA, USA) and measured using either a conventional sidestream Capnometer with a 200 ml.min-1 aspiration flow rate, or a microstream Capnometer (NBP-75, Nellcor Puritan Bennett, Plesanton, CA, USA) with an aspiration flow rate of 30 ml.min-1. After a 20 min period with stable hemodynamic variables (systolic arterial blood pressure within +/- 20% from baseline values), the EtCO2 was randomly recorded using one of the two Capnometer while arterial blood was simultaneously drawn from the radial artery and analyzed for measurement of arterial CO2 partial pressure. Afterwards the nasal cannula was connected to the other Capnometer and the procedure repeated. Both the Capnometer and arterial blood gas analyzer were calibrated before each studied patient according to the manufacturer instructions. The same procedure was repeated at least two times in each patient. A total of 120 pairs of EtCO2 and PaCO2 measurements were drawn from 30 adults (age: 69 +/- 5 years; weight: 70 +/- 10 kg; height: 160 +/- 10 cm): 60 using the conventional sidestream Capnometer and 60 with the microstream one. The median arterial to end tidal CO2 tension difference was 4.4 mmHg (range: 0.28 mmHg) with the microstream Capnometer and 7 mm Hg (range: 0-22 mmHg) with the conventional Capnometer (p = 0.02). The microstream Capnometer provides a more accurate end tidal CO2 partial pressure measurement in nonintubated, spontaneously breathing patients than conventional sidestream Capnometers, allowing for adequate monitoring of the respiratory function in nonintubated patients.
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accuracy of end tidal carbon dioxide monitoring using the nbp 75 microstream Capnometer a study in intubated ventilated and spontaneously breathing nonintubated patients
European Journal of Anaesthesiology, 2000Co-Authors: A Casati, G Gallioli, R Passaretta, M Scandroglio, B. Borghi, G TorriAbstract:Arterial carbon dioxide partial pressure measurements using the NBP-75® microstream Capnometer were compared with direct PaCO 2 values in patients who were (a) not intubated and spontaneously breathing, and (b) patients receiving intermittent positive pressure ventilation of the lungs and endotracheal anaesthesia. Twenty ASA physical status I–III patients, undergoing general anaesthesia for orthopaedic or vascular surgery were included in a prospective crossover study. After a 20-min equilibration period following the induction of general anaesthesia, arterial blood was drawn from an indwelling radial catheter, while the end-tidal carbon dioxide partial pressure was measured at the angle between the tracheal tube and the ventilation circuit using a microstream Capnometer (NBP-75®, Nellcor Puritan Bennett, Plesanton, CA, USA) with an aspiration flow rate of 30 mL min −1 . Patients were extubated at the end of surgery and transferred to the postanaesthesia care unit, where end-tidal carbon dioxide was sampled through a nasal cannula (Nasal FilterLine, Nellcor, Plesanton, CA, USA) and measured using the same microstream Capnometer. In each patient six measurements were performed, three during mechanical ventilation and three during spontaneous breathing. A good correlation between arterial and end-tidal carbon dioxide partial pressure was observed both during mechanical ventilation ( r = 0.59; P = 0.0005) and spontaneous breathing ( r = 0.41; P = 0.001); while no differences in the arterial to end-tidal carbon dioxide tension difference were observed when patients were intubated and mechanically ventilated (7.3 ± 4 mmHg; CI 95 : 6.3–8.4) compared to values measured during spontaneous breathing in the postanesthesia care unit, after patients had been awakened and extubated (6.5 ± 4.8 mmHg; CI 95 : 5.2–7.8) ( P = 0.311). The mean difference between the arterial to end-tidal carbon dioxide tension gradient measured in intubated and non-intubated spontaneously breathing patients was 1 ± 6 mmHg (CI 95 : -11–+13). We conclude that measuring the end-tidal carbon dioxide partial pressure through a nasal cannula using the NBP-75® microstream Capnometer provides an estimation of arterial carbon dioxide partial pressure similar to that provided when the same patients are intubated and mechanically ventilated.
Masayuki Inoue - One of the best experts on this subject based on the ideXlab platform.
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A Novel Nasal Cannula Type Mainstream Capnometer System Capable of Oxygen Administration
2020 42nd Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC), 2020Co-Authors: Takayuki Aoyagi, Fumihiko Takatori, Kenichiro Kabumoto, Masayuki InoueAbstract:Capnometry is a method to measure carbon dioxide (CO2) in exhaled gas and has been used to monitor patient’s respiratory status. During moderate or deep sedation, monitoring for the presence of exhaled CO2 is recommended for evaluating the adequacy of ventilation. Oxygen administration is usually given to patients with a nasal cannula to avoid hypoxia during sedation. However, the flow of oxygen administration can interfere with CO2 measurement. We developed a nasal cannula type adapter called cap-ONE nasal adapter system based on the mainstream capnography which is designed to monitor CO2 while supplying oxygen. In this study, we evaluated the basic performance of the system as compared with a conventional device using a spontaneous breathing model. The cap-ONE nasal adapter system could accurately measure PetCO2 without being disturbed by oxygen flow and efficiently supply oxygen.
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a novel mainstream Capnometer system for non invasive positive pressure ventilation
International Conference of the IEEE Engineering in Medicine and Biology Society, 2020Co-Authors: Yuya Baba, Fumihiko Takatori, Masayuki Inoue, Isao MatsubaraAbstract:Capnometry is a method to measure carbon dioxide (CO 2 ) in exhaled gas and it has been used to monitor patient respiratory status. CO 2 monitoring is also used for patients receiving non-invasive positive pressure ventilation (NPPV) therapy during mechanical ventilation. Ventilators actively dilute exhaled gas during non-invasive ventilation. In order to accurately measure end-tidal CO 2 , an adequate amount of expired gas needs to be filled in a CO 2 measurement cell before expiratory positive airway pressure (EPAP) gas from the ventilator arrives to the cell. This is the reason why it is difficult to measure CO 2 stably during non-invasive ventilation using the conventional CO 2 measurement method. Therefore, we developed NPPV cap-ONE mask, which accurately measures CO 2 in exhaled gas during non-invasive ventilation. In this study, we evaluated the basic performance of the NPPV cap-ONE mask system. The NPPV cap-ONE mask system could accurately measure CO 2 in exhaled gas comparing to the conventional device in this study.
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EMBC - A Novel Mainstream Capnometer System for Non-invasive Positive Pressure Ventilation
2020 42nd Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC), 2020Co-Authors: Yuya Baba, Fumihiko Takatori, Masayuki Inoue, Isao MatsubaraAbstract:Capnometry is a method to measure carbon dioxide (CO 2 ) in exhaled gas and it has been used to monitor patient respiratory status. CO 2 monitoring is also used for patients receiving non-invasive positive pressure ventilation (NPPV) therapy during mechanical ventilation. Ventilators actively dilute exhaled gas during non-invasive ventilation. In order to accurately measure end-tidal CO 2 , an adequate amount of expired gas needs to be filled in a CO 2 measurement cell before expiratory positive airway pressure (EPAP) gas from the ventilator arrives to the cell. This is the reason why it is difficult to measure CO 2 stably during non-invasive ventilation using the conventional CO 2 measurement method. Therefore, we developed NPPV cap-ONE mask, which accurately measures CO 2 in exhaled gas during non-invasive ventilation. In this study, we evaluated the basic performance of the NPPV cap-ONE mask system. The NPPV cap-ONE mask system could accurately measure CO 2 in exhaled gas comparing to the conventional device in this study.
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a novel mainstream Capnometer system for endoscopy delivering oxygen
International Conference of the IEEE Engineering in Medicine and Biology Society, 2017Co-Authors: Kenichiro Kabumoto, Fumihiko Takatori, Masayuki InoueAbstract:Capnometry is a method to measure carbon dioxide (CO 2 ) in exhaled gas and it has been used in patients to monitor their respiratory status. Monitoring of exhaled CO 2 during endoscopic procedures has been shown to be effective in detecting drug-induced respiratory depression. Oxygen (O 2 ) supplementation is given to patients to abolish hypoxia during endoscopy. However, oxygen administration can interfere with CO2 measurement owing to oxygen flow. Therefore, we developed cap-ONE Biteblock for patients undergoing endoscopy with oxygen supply to measure CO 2 accurately. In this study we evaluated the basic performance of cap-ONE Biteblock. The cap-ONE Biteblock system could accurately measure CO 2 and efficiently supply O 2 comparing to conventional devices via a bench study.
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EMBC - A novel mainstream Capnometer system for endoscopy delivering oxygen
2017 39th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2017Co-Authors: Kenichiro Kabumoto, Fumihiko Takatori, Masayuki InoueAbstract:Capnometry is a method to measure carbon dioxide (CO 2 ) in exhaled gas and it has been used in patients to monitor their respiratory status. Monitoring of exhaled CO 2 during endoscopic procedures has been shown to be effective in detecting drug-induced respiratory depression. Oxygen (O 2 ) supplementation is given to patients to abolish hypoxia during endoscopy. However, oxygen administration can interfere with CO2 measurement owing to oxygen flow. Therefore, we developed cap-ONE Biteblock for patients undergoing endoscopy with oxygen supply to measure CO 2 accurately. In this study we evaluated the basic performance of cap-ONE Biteblock. The cap-ONE Biteblock system could accurately measure CO 2 and efficiently supply O 2 comparing to conventional devices via a bench study.
