URN,Face Mask,Nose Cone Product Insert

Product catalog summary

Introduction: The document provides detailed instructions and specifications for the Universal Rodent Nose Cone (URN) and associated non-rebreathing systems designed for use with small rodents such as mice and rats. These systems are primarily used in conjunction with inhalant anesthesia systems but can also administer oxygen and other gases.

Specifications: The URN and URN NRB systems are coaxial non-rebreathing systems. The URN has a 17mm diameter, while the Small Rodent Face Mask comes in various sizes (Small to Extra Large). The systems are compatible with several configurations, including Jackson Rees, Bain, Mapleson D, and Ayers T piece.

Application and Usage: The systems are designed to fit the muzzle of the subject within the nose cone or face mask. The fresh gas reservoir must be large enough to exceed the subject's tidal volume. Proper oxygen flow rates are crucial to prevent CO2 buildup. Suggested flow rates are 500cc/minute for mice and 1 lpm for rats.

Components and Accessories: Each system includes silicone "O" rings and latex diaphragm materials. Additional accessories include extra "O" rings and diaphragm materials, which can be purchased separately. The document provides a detailed parts list and figures illustrating the components.

Principle of Operation: The systems operate by directing fresh gases towards the subject while waste gases are managed by the Waste Gas Management System. The flow rate of fresh gas is set high to ensure CO2 is flushed out. Proper diaphragm sizing is essential to maintain a seal and prevent gas leakage.

Replacing Components: Instructions are provided for replacing the "O" ring and diaphragm. The process involves removing the old components, installing new ones, and ensuring a proper fit to prevent gas escape. The document emphasizes using the correct materials to avoid permeability issues.

Caution: The product contains natural rubber latex, which may cause allergic reactions. Users are advised against cutting the diaphragm improperly, as it may lead to gas leakage.

Conclusion: The document provides comprehensive guidance on the setup, operation, and maintenance of the URN and associated systems, ensuring safe and effective use in veterinary settings.

Catalog excerpts

URN,Face Mask,Nose Cone Product Insert-1

Expertise In Research Anesthesia, Equipment And Supplies URN (UNIVERSAL RODENT NOSE CONE) URN NRB SYSTEM (UNIVERSAL RODENT NOSE CONE NON-REBREATHING SYSTEM) SMALL RODENT FACE MASK for use with URN NRB System body RODENT FACE MASKS MAPLESON-D NRB - With Small Rodent Face Mask

Open the catalog to page 1

URN,Face Mask,Nose Cone Product Insert-2

Face Mask / Nose Cone / URN / Mapleson-D NRB User Instructions Application: The URN (designed to be used with a coaxial non-rebreathing system), and URN NRB system (a coaxial non-rebreathing system), and Small Rodent Face Mask, and Mapleson-D NRB are designed to be used primarily with mice and rats. These devices are usually used in conjunction with an inhalant anesthesia system; however they could be used to administer oxygen and/or other metabolic gases without inhalant anesthesia (for example if the subject were anesthetized with an injectable anesthetic). However, any species can be safely...

Open the catalog to page 2

URN,Face Mask,Nose Cone Product Insert-3

Optional Accessory - AA-00-0309 A 6 inch wide X 36 inch long sheet of 12 mil latex diaphragm material that can be purchased separately. (see figure 6) 2 Figure 6

Open the catalog to page 3

URN,Face Mask,Nose Cone Product Insert-4

Legend for Figures #7, #8, and #9 (URN NRB and Mapleson-D NRB systems) #1. Silicone "O" ring AA-00-0319 for URN and URN NRB System. Note: Each URN and URN NRB System comes with an extra "O" ring. #2. Silicone "O" ring AA-00-0315 for Small Rodent Face Mask. Note: Each Small Rodent Face Mask comes with an extra "O" ring. #3. 12 mil Latex Diaphragm. Note: Each URN, URN NRB System, and Small Rodent Face Mask comes with an extra 6 inch X 6 inch sheet of Latex Diaphragm material to facilitate replacing defective diaphragms. Note: Extra diaphragm material may be purchased separately. AA-000309 (6 inch...

Open the catalog to page 4

URN,Face Mask,Nose Cone Product Insert-5

5. Since the anesthetic gases and the typical carrier gases (Example: 100% Oxygen, Medical Air, Nitrous Oxide, Nitrogen, etc.) are extremely volatile, the fresh gas flowrate is used to continually flush the waste gases into the Waste Gas Management System. It is vital to the proper operation of the NRB System that the diaphragm of the URN and the Small Rodent Face Mask be cut with the proper sized orifice--appropriate for the size of the subject and the position of the subject. Since rodents are obligatory nose breathers in the sternal recumbency, it is not necessary to insert more than the subject's...

Open the catalog to page 5

URN,Face Mask,Nose Cone Product Insert-6

Replacing the "O" Ring and the Diaphragm: 1. The silicone "O" ring holds the diaphragm material in place on the URN and Rodent Face Mask fresh gas reservoir. A. Silicone is more resistant to photo degradation and oxidation than latex. However, when it becomes cracked or broken and will no longer hold the diaphragm material in place, it is time to change the "O" ring. An extra "O" ring comes with each kit. Additional "O" rings can be purchased separately. 2. The "O" ring can be removed by rolling it from the groove it rests in. Using your thumb, press down and roll the "O" ring to the front to...

Open the catalog to page 6