Journal: Jornal Brasileiro de Pneumologia

Article Title: Development and preliminary tests of a portable volumetric capnograph for outpatient use

doi: 10.36416/1806-3756/e20250136

Figure Lengend Snippet: Illustration of the main components of our portable volumetric capnograph: a flow sensor connected to a differential pressure transducer, and a CO 2 transducer connected to a microcontroller. The transducers have a digital output that integrates them with the microcontroller, which is connected to a laptop computer.

Article Snippet: The selected components were as follows: a Hamilton ® pediatric/adult flow sensor (variable orifice; Hamilton Medical AG, Graubünden, Switzerland) an SDP810-125PA differential pressure sensor (Sensirion AG, Stäfa, Switzerland) with an I2C digital output a Capnostat 5 CO 2 sensor (Philips Respironics, Murrysville, PA, USA) with an RS232 digital output an Arduino UNO-R3 ® microcontroller with an Atmega328P ® processor (Arduino, Monza, Italy) illustrates the main components used in developing the device.

Techniques:

Journal: Jornal Brasileiro de Pneumologia

Article Title: Development and preliminary tests of a portable volumetric capnograph for outpatient use

doi: 10.36416/1806-3756/e20250136

Figure Lengend Snippet: Graphs comparing our portable volumetric capnograph (CapVol) with a CO 2 SMO Plus ® DX-8100 oxycapnograph (Philips Respironics, Murrysville, PA, USA; reference equipment). In A, differential pressure (Pa) vs. flow for the reference equipment. In B, partial pressure of CO 2 (PCO 2 ) for CapVol vs. the reference equipment. PI: prediction interval.

Article Snippet: The selected components were as follows: a Hamilton ® pediatric/adult flow sensor (variable orifice; Hamilton Medical AG, Graubünden, Switzerland) an SDP810-125PA differential pressure sensor (Sensirion AG, Stäfa, Switzerland) with an I2C digital output a Capnostat 5 CO 2 sensor (Philips Respironics, Murrysville, PA, USA) with an RS232 digital output an Arduino UNO-R3 ® microcontroller with an Atmega328P ® processor (Arduino, Monza, Italy) illustrates the main components used in developing the device.

Techniques:

Journal: Jornal Brasileiro de Pneumologia

Article Title: Development and preliminary tests of a portable volumetric capnograph for outpatient use

doi: 10.36416/1806-3756/e20250136

Figure Lengend Snippet: Capnography curves. In A, tidal volume vs. partial pressure of CO 2 (PCO 2 ), highlighting the position of slope III (volunteer 3, expiratory cycle 2). In B, tidal volume vs. PCO 2 , highlighting the position of slope III (volunteer 3, expiratory cycle 8). In C, tidal volume vs. PCO 2 , highlighting the position of slope III (volunteer 2, expiratory cycle 17). In D, tidal volume vs. PCO 2 , highlighting the position of slope III (volunteer 2, expiratory cycle 27).

Article Snippet: The selected components were as follows: a Hamilton ® pediatric/adult flow sensor (variable orifice; Hamilton Medical AG, Graubünden, Switzerland) an SDP810-125PA differential pressure sensor (Sensirion AG, Stäfa, Switzerland) with an I2C digital output a Capnostat 5 CO 2 sensor (Philips Respironics, Murrysville, PA, USA) with an RS232 digital output an Arduino UNO-R3 ® microcontroller with an Atmega328P ® processor (Arduino, Monza, Italy) illustrates the main components used in developing the device.

Techniques: