Nihon Kohden Corporation

Other

Newport Medical Instruments, Inc.

Suzuki Corporation

Yoshitsugu Yamada

Kazufuku Nitta

Katsuyoshi Suzuki

Yasuhito Sugiura

Mikio Yasukawa

Toshihisa Takaki

Masahiro Kamada

Shinji Yamamori

Katsumi Nakaichi

Hong-Lin Du

Tomohisa Ohtake

Masatake Saito

Marcelo B P Amato

Bich N Nguyen

The present invention provides an artificial respiration apparatus of a high oscillation type, in which oxygen supply to a patient P and exhaled gas discharge are urged by an oscillating gas having a higher frequency than the cycle of the patient respiration. The apparatus includes a discharge direction regulating mechanism for regulating the exhaled gas to flow only in the discharge direction.

Artificial respiration apparatus

A system and method of controlling the termination of the inhalation phase in a pressure support ventilation system is disclosed, in which an expiratory trigger sensitivity, or ratio of inspiratory flow rate to peak inspiratory flow rate at which the inspiration phase is terminated, is varied in proportion to variations in a calculated respiratory time constant. The system includes sensors for monitoring pressure and flow of gas during each breath, and, based on the sensor outputs, calculates the respiratory time constant for one breath or a series of breaths. The expiratory trigger sensitivity is automatically increased with increasing patient respiratory time constant, providing a closed loop control of expiratory trigger sensitivity. The expiratory trigger sensitivity may also be varied in response to changes in supra-plateau pressure.

Pressure support ventilation control system and method

An endoscope for intubating an endotracheal tube includes an elongated insertion portion including at least an image transmitting optical fiber bundle, an illumination light transmitting optical fiber bundle, and a bendable element, an operation portion connected to the proximal end portion of the insertion portion, a bending operation mechanism provided in the operation portion, an endotracheal tube connection section provided in the vicinity of a joint between the insertion portion and the operation portion; and a bendable element for bending the insertion portion provided so as to extend from the inside of the insertion portion to the bending operation mechanism.

Endoscope

A respiratory muscle activity monitoring apparatus is provided with a pressure sensor for detecting pressure in an air passage connecting a lung ventilator and the airway system of a patient and a flow rate sensor for detecting flow rate in the air passage. An arithmetic constant detecting unit detects resistance Rrs and elastance Ers of the respiratory system including the airway and thorax beforehand by using detection signals from the pressure sensor and the flow rate sensor while the lung ventilator is supplying air to the patient whose spontaneous breathing is temporarily stopped. Using airway opening pressure Paw detected by the pressure sensor and flow rate dV/dt detected by the flow rate sensor, a developed pressure calculating unit calculates pressure Pmus developed by the respiratory muscles during mechanical ventilation as well as during spontaneous breathing from the expression: Pmus=-Paw+Rrs(dV/dt)+Ers .intg.(dV/dt)dt. An output unit displays and/or records the obtained Pmus together with waveform signal detected by the pressure sensor along a common time axis. Furthermore, by detecting a tidal volume VT from flow rate, work Wmus is calculated as follows: Wmus=-.intg.Paw(dV/dt)dt+.intg.Rrs(dV/dt).sup.2 dt+(1/2)Ers(VT).sup.2

Apparatus for monitoring respiratory muscle activity

Growing community of inventors

Tokyo, Japan

Yoshitsugu Yamada