A Computerized Standard Flow-Generator for Spirometer Calibration
スポンサーリンク
概要
- 論文の詳細を見る
We analyzed the dynamic characteristics of a newly designed standard flow generator (SFG) to be used for spirometer calibration. The SFG consisted of a computer, large-bore cylinder, and piston driven by a high torque motor. The computer develops numerical equations to simulate a flow-volume pattern with different convexities of the descending limb. The excursion of the piston was processed according to the computer-developed equation. The computer's numerical solutions were compared to those of the SFG and agreement of the values of the peak flow, forced expiratory volume, and flow-volume pattern was satisfactory in repeated trials. Application of an external resistive load (3.5cm H_2O/sec) did not change the flow output. However, there were several minor disagreements due to the dynamic characteristics of the SFG. In an emphysema pattern the ascending limb of the generated flow-volume curve flattened and the descending limb was less convex compared to the preset pattern. When the SFG was generating sinusoidal waves of high frequency (e.g., 10.0 Hz) the flow out-put was deformed. The newly designed SFG was used to examine the dynamic characteristics of rolling-seal spirometers. There was an overshoot of the peak flow, over-convection, and oscillations of the descending limb in the spirometer output. These deformations were more prominent with the severe emphysema pattern. It is concluded that the SFG can be very useful in the examination and calibration of spirometers.
- 東海大学の論文
著者
-
KONDO Tetsuri
Department of Medicine, Tokai University Oiso Hospital
-
Kuwahira Ichiro
Department Of Medicine School Of Medicine Tokai University
-
Kuwahira Ichiro
Department Of Internal Medicine Tokai University School Of Medicine
-
OGUSHI Yoichi
Department of Medical Informatics, Tokai University School of Medicine
-
Ogushi Yoichi
Department Of Medical Informatics Tokai University School Of Medicine
-
Kondo Tetsuri
Department Of Medicine Tokai University School Of Medicine
-
Kondo Tetsuri
Department Of Internal Medicine Tokai University School Of Medicine
-
OHTA Yasuyo
Department of Medicine, Tokai University School of Medicine
-
Yamabayashi Hajime
Department Of Medicine Tokai University School Of Medicine
-
MURATA Takahiko
Department of Medicine, School of Medicine, Tokai University
-
Murata T
Department Of Medicine School Of Medicine Tokai University
-
Ono Y
Second Department Of Internal Medicine School Of Medicine Tokai University
-
Murata Takahiko
Department Of Medicine School Of Medicine Tokai University
-
Kondo T
Department Of Medicine Tokai University School Of Medicine
-
Ohta Yasuyo
Department Of Medicine Tokai University School Of Medicine
-
Yamabayashi Hajime
Department Of Chest Medicine School Of Medicine Tokai University
-
Yamabayashi H
Tokai Univ. Isehara
-
OGUSHI Yoichi
Department of Medical Engineering and Informatics, Tokai University School of Medicine
関連論文
- An analysis of the chest wall motions using the dynamic MRI in healthy elder subjects
- Evaluation of applied cases of thrombolytic therapy against ultra-acute ischemic stroke : Using the Japanese Standard Stroke Registry Database
- Vibratory Stimulation of Expiratory Muscles Inhibits Respiration
- Biofeedback Training for Bronchial Asthma (Part II)
- Roles of a prostaglandin E-type receptor, EP3, in upregulation of matrix metalloproteinase-9 and vascular endothelial growth factor during enhancement of tumor metastasis
- Effectiveness of the Fold Plication Method in Lung Volume Reduction Surgery
- Impact of Fluticasone Diskhaler on Health-related Quality of Life in Asthmatic Patients
- Applicability of Hyland's Living with Asthma Questionnaire for Japanese Asthmatic Patients
- Effect of Chronic Furosemide Administration on Acid-base Balance in Patients with Chronic Hypercapnic Respiratory Failure
- Three Cases of Primary Lung Cancer Undetected by an Annual Checkup
- Evaluation of Image Qualities on the International Standard Video-conferencing
- Effects of Bronchial Intermittent Constrictions on Explosive Flow during Coughing in the Dogs
- Exposure to Hypoxia Results in Uneven Pulmonary Blood Flow Distribution Prior to Pulmonary Edema
- Regulation of Intracranial Pressure in the Rat with Chronic Moderate Hypercapnia
- An Increase in the Threshold of Citric Acid-Induced Cough during Chest Wall Vibration in Healthy Humans
- Contribution of Airway Resistance to Airway Pressure during Mechanical Ventilation : an Experimental Study
- The Mechanism of Respiratory Rhythm Generation during Constant Flow Assisted Mechanical Ventilation in the Decerebrated Dog
- Tracheal, Circulatory, and Respiratory Responses to Femoral Nerve Stimulation
- Rush Immunotherapy with House Dust Extract in Patients with Mild Extrinsic Asthma
- Differentiation of Lung Cancer and Radiation Fibrosis Using Magnetic Resonance Images : A Case Study
- Dependence of Transverse Relaxation Time T_2 of Biologic Tissues on the Interpulse Delay Time in Carr-Purcell-Meiboom-Gill (CPMG) Measurements
- Aerosolized methacholine-induced bronchoconstriction and pulmonary hyperinflation in rats
- A case of the diaphragmatic flutter with an electromyographic study of the respiratory muscles
- Parasympathetic neural control of canine tracheal smooth muscle
- Diaphragmatic Flutter with a Manifestation of High Frequency Ventilation
- Inhaled flow and Handling of Fluticasone Diskhaler by Asthmatic Patients
- Comparison of Carboplatin/Etoposide/Vincristine with Cisplatin/Etoposide as Combination Chemotherapy for Small Cell Lung Cancer
- O_2 Uptake and CO_2 Elimination during Mechanical Ventilation with High Frequency Oscillation
- A Computerized Standard Flow-Generator for Spirometer Calibration
- Clinical Evaluation of Two Combination Chemotherapies for the Treatment of Small Cell Carcinoma of the Lung
- Multiplicity of Functional Behavior of Human Intercostal Muscles
- Effects of Inspiratory Pressure Oscillation on Pulmonary Gas Exchange and Circulatory Functions in Anesthetized, Mechanically Ventilated Dogs
- Measurement of Functional Residual Capacity and Pulmonary Carbon Monoxide Diffusing Capacity during Mechanical Ventilation with PEEP
- Paraquat Poisoning : A Review of Four Cases
- The Threshold of the Intermittent Hypoxic Exposure Period to Elicit Polycythemia in Rats
- Lifestyle and Colorectal Cancer : A Case-control Study
- Is Interest in Art Effective in Health-Related Quality of Life? : Results of a Cross-Sectional Survey on Lifestyle and Health Promotion
- Application of telepsychiatry : A preliminary study
- Computer Simulation of Exercise Hyperpnea
- Brain Aging and Nutrition
- Spirometric and flow-volume curve analysis in rats, and optimal parameters for estimating obstructive impairment
- Cough reflex is additively potentiated by inputs from the laryngeal and tracheobonchial receptors and enhanced by stimulation of the central respiratory neurons
- Changes in Diaphragmatic EMG Activity during sleep in Space
- Simultaneous Measurements of Shifts of the Center of Gravity Caused by Ventilation and Cardiac Motions towards Three Body Axes
- Diffusion, Convection and their Coupling as Gas Transport Mechanisms in the Lungs : A Model Experiment
- Prediction Chart for the Impaired Fasting Glucose (IFG) Development Rates Using Risk Factor Categories
- Availability of Japanese Subsidies for International Telemedicine Projects
- Reproducibility of Arterial Blood Gases Determined under Hypobaric Hypoxia in Japanese Himalayan Climbers
- Studies on Gas Exchange and Acid-base Balance in the Tissue by Means of the Subcutaneous Liquid Pocket with Fluorocarbon Emulsion
- Binary Diffusion Coefficient : Theory, Experimental Assessment and its Implications as a Limiting Factor of Pulmonary Gas Exchange at Depths
- Influence on the respiratory tract of the Mycoplasma pneumoniae pneumonia as a manifestation factor of bronchial asthma
- Bronchial Asthma Developing after 15 Years of Immunosuppressive Treatment Following Renal Transplantation
- Is Gas Density Independent of the Maximum Expiratory Flows at Low Lung Volumes?
- Functional Residual Capacity and Airway Resistance of the Rat Measured with a Heat- and Temperature-Adjusted Body Plethysmograph
- Hemophagocytic Lymphohistiocytosis Secondary to Mycoplasma pneumoniae Infection without Pneumonia