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Home Biotechnologies The ICP-monitor

The ICP-monitor

Description

The ICP-Monitor consists of a probe (a) (catheter with an small balloon from the silicone natural rubber situated at the tip), filled with the sterile aseptic fluid, external pressure transducer (b) (the tensometer) and electron module (c). The intracranial pressure is been transmitted through a thin wall of probe to sterile fluid, then through the capillary box (d) - to the viscous silicone liquid of the tensometer. Here the intracranial pressure is been transformed to an electrical signal.

The capillary box parts the physiological solution and silicone fluid, their blending does not permit and suppresses the various reverberative phenomena in a measuring system.

The external transducer is supported by a special (e) clamps at the fixed control point concerning a head of the patient, in order to avoid a measurement error. In the ICP-Monitor, the correction of zero drift and the calibration of zero pressure in vivo in accordance with the atmospheric pressure is been provided.

For measuring the epidural pressure, the catheter placed to the dura mater. For measuring the pressure in ventricle or parenchyma of the brain are used intraventricular and intraparenchymal catheters. Mean pressure luminance’s on the digital display, and on the display of computer - amplitude of wavelike constituents of the ICP-pressure every 0,01-5 s.

Technical parameters of the device

  • Measurement range ICP: –––––––––––––––––––––––––––– -50 to +300 mmHg.
  • The step of the measurement: –––––––––––––––––––––––– 0,1 mmHg
  • Voltage output: –––––––––––––––––––––––––––––––––––– 10,5 mV/mmHg.
  • Zero drift: –––––––––––––––––––––––––––––––––––––––– ±0,07 mmHg
  • Measurement range temperature: ––––––––––––––––––––– -70 to +199,90C
  • The step of the measurement: –––––––––––––––––––––––– 0,10C
  • RS 232 C interface: –––––––––––––––––––––––––––––––– 9600 Bd
  • Operating voltage: ––––––––––––––––––––––––––––––––– 220 V~, 50 Hz
  • Required power: ––––––––––––––––––––––––––––––––––– 22 V x A
  • Accuracy class: –––––––––––––––––––––––––––––––––––– 2

Different catheters are prepared. They are sterile and assume the singletime use.

Characteristics of an epidural catheter:

  • Material of small balloon –––––––––––––––––––––––––––– silicone natural rubber
  • Filling volume ––––––––––––––––––––––––––––––––––––– 0,25-0,3 ml
  • Material of catheter –––––––––––––––––––––––––––––––– polyurethane
  • Outside diameter –––––––––––––––––––––––––––––––––– 2mm
  • Inside diameter ––––––––––––––––––––––––––––––––––– 1mm
  • Length –––––––––––––––––––––––––––––––––––––––––– 250 mm

Innovative Aspect and Main Advantages

The basic innovative aspects of the ICP-Monitor:

  • The patient gets in touch with the sterile probe only.
  • No electrical connection to the patient.
  • The device is most simple to use.
  • No error due to various reverberative phenomena.
  • The device and catheters are much cheaper, than at other firms.

The ICP-Monitor is one step into the future of ICP monitoring. System software allows appealing to measuring modules by their addresses, inputting information to computer, gathering and mathematical analyzing of data, graphical data representation during several days monitoring. The advantage of this device is its inexpensiveness.

Areas of Application

The ICP-Monitor is been used in neurosurgery for monitoring an increasing intracranial hypertension at the patients with a severe traumatic brain injury, penetrating craniocerebral injuries, ischemic and hemorrhagic insult and tumor of a brain.

Ranges of ICP monitoring of a brain:

  • subdural – subarachnoidal;
  • parenchymatous;
  • ventricular;
  • epidural.

With respect to complications, it is important to take into account that for head injured patients ICP monitoring supplies the decisive parameters for the subsequent treatment decisions. Particularly, these patients benefit from aggressive ICP treatment.

ICP-Monitor
Fig. 1 The ICP-Monitor consists of a probe (a) (catheter with an small
balloon from the silicone natural rubber situated at the tip),
filled with the sterile aseptic fluid, external pressure transducer
(b) (the tensometer) and electron module (c); capillary box (d); (e) clamps.

Stage of Development

The ICP-Monitor designed by the scientists of O.O.Galkin Donetsk Institute of Physics and Engineering National Academy of Science of Ukraine, M.Gorkii Donetsk State Medical University and Institute of Electrodynamics National Academy of Science of Ukraine, Kiev. The device is tested, is available for demonstration and has passed approbation in reanimation ward of Donetsk regional neurosurgery center.

Contact Details

O.O.Galkin Donetsk Institute of Physics and Engineering National Academy of Science of Ukraine
Drobotko Valery Fedorovych
R. Luxcemburg Str., 72, Donetsk-114, 83114, Ukraine.
Tel./Fax. : +38 (062) 337-9018
E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

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