Cannula composition

Table II. Effect of Cannula Composition and Area on Platelet Consumption (8)...

Arterialized capillary blood is sometimes an acceptable alternative to arterial blood when blood losses need to he minimized, when an arterial cannula is not available, or to prevent repeated arterial puncture. Freely flowing cutaneous blood originates in the arterioles and corresponds closely to arterial blood in composition. However, arterialized capfl-... 

Fig. 3 Examples for application fields of SMPs. (A) Offset fed antenna reflector in packaged shape (B) dress with adaptable fashion made of SMP fibers (taken from [17] by permission of Woodhead Publishing LTD, UK) (C) reusable mandrel for tooling (taken from [6], reprinted by permission from the Society for the Advancement of Material and Process Engineering (SAMPE)) deployable antenna reflector of satellite in open (D) and closed (E) shape (F) aircraft with morphing wings (G) spoons for handicapped people (taken from [183] by permission of lOP) (H) intravenous cannula from SMP (taken from [183] by permission of lOP) (J) hinge made of an SMP composite. A, D, E, F, J provided by CTD Composite Technology Development...

The choice of size, shape, and composition of the tube should be individualized. Tracheostomy tubes and cannulae for home use are made of plastic or silicon. Silicone tubes are more flexible than PVC tubes and may offer a better fit. To allow for connection to the ventilator, the tube must extend at least 2 to 3 cm beyond the stoma, but should be situated no closer than 2 cm from the carina. The tube curvature should be such that the tube is in the center of the tracheal lumen rather than impinging on the tracheal wall—to avoid damage to the tracheal wall and to avoid problems with ventilation, comfort, and speech. 

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