Editando Penlon PPV

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This page contains repair and service information for positive pressure ventilation vaporizers provided by Penlon.

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== ***Background and Identification*** ==

Sigma Delta PPV vaporizers (GMDN code: 36980 (Sevoflurane); 36890 (Isoflurane); 36891 (Halothane)) are designed to deliver concentrations of anesthetic vapor through the air. The first iteration was reportedly made in 1986 and was originally manufactured in Abingdon, England. These vaporizers operate through a direct connection between the flowmeter unit and the common gas outlet of the machine, incorporating the fresh gas supply system of continuous flow anesthetic machines. Fault finding and inspections are highly recommended to ensure that everything is always functioning properly. These tests include:

·         Concentration Output

·         Wick Assembly

·         Temperature Compensator

·         Closing Mechanism

·         Level Indicator and Filler

·         Keyed Filler

·         Concentration Control

·         Gear Train Setting

·         Connector Block PRV

Eventually, an interlock system was added to the vaporizer that allows the user to have up to three Sigma Interlock Vaporizers on the back-bar, so that only one of these vaporizers can be used at a time. The system activates when the control dial is turned on and deactivates when the control dial returns to the zero position.

Currently, Penlon provides three types of PPV vaporizers: Sigma Delta, Sigma Delta MRI, and Sigma EVA (GMDN code: 36979).

== ***Technical Specifications*** ==

=== ***Sigma Delta*** ===

·         Weight: 4.8kg

·         Cagemount dimensions: 133 W x 158 D x 242 H (mm)

·         Dräger Dimensions: 100 W x 190 D x 242 H (mm)

·         Capacity Volume: 250 mL

·         Volume at MIN mark: 35 +- 10 mL

·         Flow range: Operating flow range 0.2 to 15 litres/min

·         Temperature range: 15° to 35°C (58° to 95°F)

=== ***Sigma Eva*** ===

·         UK design and manufacture

·         Compatible with Selectatec®, Dräger Plug-in® and Dräger Auto-Exclusion®mounting systems

·         SAFE-FIL® filling system

·         1%-18% concentration range

·         Low agent indicator

·         Low power consumption

=== ***Sigma Delta MRI*** ===

·         Approved for use with 1.5 and 3 tesla scanners, up to 1000 gauss

Sources: [link|https://storage.googleapis.com/avante/documents/PenlonSigmaDelta.pdf|Sigma Delta specs], [link|https://www.penlon.com/getmedia/dae0dca7-06da-43ea-9bf6-1988f3164b2c/Sigma-EVA-Sales-EN-0119.pdf|Sigma EVA specs], [link|https://www.penlon.com/Product-Groups/Vaporizer/Sigma-Delta-MRI|Sigma Delta MRI specs]

== Additional Information ==

* [link|https://www.penlon.com/About-us/Company-History|Penlon Company History]: A summary of the Penlon’s development and manufacturing history.
* [link|https://manualzz.com/doc/6284416/sigma-delta-service-manual|Sigma Delta Service Manual]: Consult the Sigma Delta manual for more technical and service information.
* [link|https://doi.org/10.1097/00000542-199904000-00044|An Unexpected Penlon Sigma Elite Vaporizer Leak]: This case report by Sandra Lewis, Jeff Andrews, and Gary Long highlights some of the issues involved with vaporizers, and how they may happen.

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Penlon PPV Service Manual.pdf

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