Tonometrics Catheters and Other Tonometry Accessor

Tonometrics Catheters and Other Tonometry Accessories

The Tonometrics Catheter with biofilter and sampling line is used for the determination of gastric PCO2 (PgCO2) and intramucosal pH (pHi) of the gastric mucosal tissue.

All catheters are based on the same principle including a gas-permeable silicone balloon. Carbon dioxide freely equilibrates between the gastrointestinal wall, the lumen and the content of the balloon. A sample is drawn from the balloon and the PgCO2 is analyzed automatically with GE Healthcare Tonometry Monitors (Tonocap or Tonometry Module).

  • A calibration gas, regulator and calibration gas sampling line is used to calibrate the S/5 Tonometry Module.
  • A calibration gas and regulator are used to calibrate the Tonocap monitor via the EtCO2 monitoring port.
  • A D-fend Water Trap collects the mucous secretions and moisture when measuring EtCO2 with S/5 gas module or Tonocap.
  • An Airway Sampling Line is used to measure the EtCO2 with S/5 gas module or Tonocap.
  • The Tonocap Monitor can be connected to a printer using a printer cable.
  • The Tonocap Monitor can be connected to a PC using an interface cable.
  • Collect Software is used for PC data acquisition.
  • Please refer to Datex-Ohmeda Supplies & Accessories e-Catalog.




Please consult your local distributor for the availability of the catheters, as there may be local regulatory restrictions.





Tonometrics Catheters

Tonometry Catheter, 8 F

  • Application area: pediatrics and gastroenterology
  • Material: polyurethane
  • Includes an integrated sampling line with biofilter and feeding tube
  • To only be used with the GE Healthcare Tonometry Monitors
  • Order code: TONO-8F (box of 5 pieces)




Tonometry Catheter, 14 F

  • Application area: general ICU and OR
  • Material: polyurethane
  • Includes an integrated sampling line with biofilter and a Levin type nasogastric tube
  • To only be used with the GE Healthcare Tonometry Monitors
  • Order code: TONO-14F (box of 5 pieces)




Tonometry Catheter, 16 F

  • Application area: general ICU and OR
  • Material: medical grade PVC
  • Includes an integrated sampling line with biofilter and a vented nasogastric sump (Salem type)
  • To only be used with the GE Healthcare Tonometry Monitors
  • Order code: TONO-16F (box of 5 pieces)




Tonometry Catheter, 18 F

  • Application area: emergency and trauma
  • Material: medical grade PVC
  • Includes an integrated sampling line with biofilter and a vented nasogastric sump (Salem type)
  • To only be used with the GE Healthcare Tonometry Monitors
  • Order code: TONO-18F (box of 5 pieces)





Tonocap data collection downloads

Note: Collect Software works only in DOS environment.

Collect Software v.2.2 and User's Manual

Collect Software v.2.2 enables the collection and manipulation of the information obtained by the Tonocap Monitor with a PC.




Collect Software v.2.2

The file is in pkzip compressed form. Use e.g. pkunzip.exe to uncompress the files.

The Collect Software User Manual gives information on how to use Collect Software




The Collect Software is for a PC platform only.

The User's Manual files are Microsoft Word for Windows 6.0 Documents.