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Table 1 Characteristics of the items of equipment used in the study

From: Effect of negative air ions on the potential for bacterial contamination of plastic medical equipment

Item of Equipment

Description

Component Tested

Component Material

Characteristic Dimension

Relative Electrical Permittivity @ 1 Mhz

Ventilator tubing

Parallel twin plastic ventilator tubes (1.6 m long)

Centre portion of tube

Low density polyethylene (LDPE)

25 mm external diameter tube

2.2 - 2.35

Ventilator Mask

Single port mask with attachment for ventilator tubing

Mask

Cushion Thermoplastic elastomer

(TPE)

Height: 110 mm

Width: 85 mm

Depth: 42 mm

Unknown

Nebulizer tubing

Nebulizer with reservoir tubing

Reservoir tubing

Polyvinylchloride (PVC)

6 mm external diameter tube

2.8

Unometerâ„¢ box and tubing

Urological collection and monitoring system with collection bag

Plastic measuring box

Styrene acrylonitrile (SAN)

Height: 105 mm

Width: 180 mm

Depth: 45 mm

2.55 - 2.95

Unometerâ„¢ box and tubing

Urological collection and monitoring system with collection bag

Tubing

Polyvinylchloride (PVC)

9 mm external diameter tube

2.8

Disposable Apron

Plastic disposable Apron

Apron

Polyethylene (PE)

265 mm × 275 mm

2.3