AVL 995

Current designs of instruments providing blood gas and electrolyte results make them suitable for use in a point of care (POCT) setting. Such instruments may be sited away from the main laboratory in accident and emergency departments, intensive care, coronary care and special baby care units.

The AVL 995-Hb measures carbon dioxide partial pressure, oxygen partial pressure, hydrogen ion concentration expressed as pH and hemoglobin in whole blood. The AVL 995-Hb also measures gas partial pressures in expired gas. The AVL 984-S determines sodium, potassium and ionized calcium in whole blood, serum, dialysate fluids and urine. The two instruments work independently of each other and require individual sample input. However they can be interfaced electronically so that patient results from the 984-S are transmitted to the 995-Hb for printing on a combined blood gas and electrolyte report. Hydrogen ion concentration, electrolytes and blood gas partial pressures are measured using electrode technology. Hemoglobin is quantified by measurement of the absorbance of a haemolysate at 546 nm. Thirteen other parameters are derived mathematically from the measured parameters.

The measurement of all the available analytes was evaluated. Whole blood samples were used for blood gas, pH and hemoglobin assessment and whole blood and plasma samples for sodium and potassium; calcium measurement was assessed using quality control material only. The evaluation included assessment of the analytical performance, carryover, ease of use, safety and reliability of the analyzer.

Adjustments can be made to the instrument's calibration to enable satisfactory correlation with other instrumentation. Instrument maintenance was straightforward.

AVL Blood Gas Analyzer Model 995

	Blood Gas Analyzer
	pO2, pCO2, pH
	30 samples/hour
	18x16x22in (46x41x56cm), 65 lbs (29kg)

 AVL 995 Hb

pH, pCO2, pO2, tHb

Main features of both analysers, quoted by the manufacturer

Analytes measured: 995-Hb: Carbon dioxide and oxygen partial pressures, hydrogen ion concentration reported as pH, hemoglobin
984-S: Sodium, potassium and ionized calcium

Analytical system: Flow through, separate sample for each analyzer, electrolyte measurement by ion-selective electrode.

Operator interface: 995-Hb: 2 row display, touch sensitive membrane keyboard 984-S: Dot-matrix LED display, 'Yes' and 'No' buttons

Sample: 995-Hb: 95 µL whole blood or 50-100 mL expired air 984-S: 120 µL whole blood, serum, dialysate fluid or diluted urine

Sample collection: Anaerobic for blood gas analysis; heparin anticoagulant

Calibration of blood gases: Integral gas mixer produces 2 mixtures from compressed air and carbon dioxide

Analysis rate: 995-Hb: Up to 30 samples/hour
984-S: Up to 40 samples/hour

Results: 7 measured parameters and 13 calculated parameters

Printer: Integral thermal printers in both instruments, results from 984-S can be automatically transferred to the 995-Hb.

Languages: English, French, German, Italian, Portuguese, Spanish

Result recall: Last sample, can be recalculated using revised patient data

Interface ports: 995-Hb: several;
984-S: RS 232 C

Analyzer dimensions: 995-Hb: 400 mm W x 450 mm H x 557 mm D 984-S: 300 mm W x
345 mm H x 270 mm D

Analyzer weight: 995-Hb: 35·5 Kg; 984-S:
11 Kg

  GMI, Inc.
  6511 Bunker Lake Blvd.  
  Ramsey,   Minnesota, 55303   USA
  Tel. 763-712-8717          Fax 763-712-8724 
  Send electronic mail to richard@gmi-inc.com