Frequently Asked Questions

Question 1

What is inhalation sedation (RA/Entonox)?

Accepted Answer

Inhalation sedation uses a mixture of nitrous oxide and oxygen (commonly called "laughing gas") to help anxious patients relax during dental or medical procedures. It's self-administered, works within minutes, and wears off quickly — patients can typically drive home afterward.

Question 2

What is the Anaesthetic Gas Scavenging System (AGSS)?

Accepted Answer

AGSS safely removes waste anaesthetic gases from the operating environment, protecting both staff and patients from exposure. R A Medical supplies the Porter Brown BS Scavenger and Accutron Miniscav systems for this purpose.

Question 3

What is the difference between single and double nasal masks?

Accepted Answer

Single masks rely on a tight seal around the nose and are less efficient. Double masks have an inner mask for gas delivery and an outer shell that captures exhaled gases for scavenging — making them significantly safer and the recommended choice for conscious sedation.

Question 4

How often should my sedation equipment be serviced?

Accepted Answer

We recommend annual servicing for all sedation and scavenging equipment. Regular servicing ensures accurate gas flows, safe working pressures, and compliance with guidelines. R A Medical offers on-site engineer visits and a 3-day postal turnaround service.

Question 5

Can I use petroleum-based lubricants on Porter Brown equipment?

Accepted Answer

No. Porter Brown hoods and breathing systems must never be lubricated with petroleum-based products (e.g., standard Vaseline). These attack the silicone seals. Use only water-based or manufacturer-approved lubricants.

Question 6

What is the correct flapper valve orientation for the Porter Brown hood?

Accepted Answer

The flapper valve must be installed with the curved face toward the patient (inlet side) and the flat face toward the exhaust port. Incorrect orientation causes re-breathing of CO₂. Refer to our installation guide with diagrams.

Question 7

Is inhalation sedation classified as an Aerosol Generating Procedure (AGP)?

Accepted Answer

Yes — in most clinical settings, inhalation sedation is classified as an AGP due to the proximity of staff to the patient's aero-digestive tract. However, when proper double-mask technique and active scavenging are used, the risk is significantly reduced.

Question 8

What cylinder check valve issues should I look out for?

Accepted Answer

If you hear ticking, hissing, or see the gauge fluctuate, the cylinder check valve may be failing. This can cause incorrect pressure readings and affect gas delivery accuracy. Do not use the equipment — contact R A Medical for assessment and replacement.

Question 9

What is the turnaround time for postal equipment servicing?

Accepted Answer

Our postal servicing offers a 3-day turnaround from receipt of equipment at our facility. We service all major brands including Porter, Matrx MDM, Accutron, and Cyprane to OEM specifications using genuine replacement parts.

Question 10

How do I choose the right size nasal mask for my patient?

Accepted Answer

Porter and Accutron masks are available in paediatric, adult, and large adult sizes. The correct size depends on the patient's facial structure — the mask should form a comfortable seal without applying excessive pressure. When in doubt, size up.

Question 11

Are single-patient-use breathing circuits safe for sedation?

Accepted Answer

Yes, when used correctly with proper scavenging. Single-patient-use circuits are designed for one-time application and help reduce cross-contamination risk. They must still be connected to an active scavenging system to safely remove exhaled gases.

Question 12

How can I reduce nitrous oxide waste in my practice?

Accepted Answer

Using efficient scavenging systems (active flow at 40–45 L/min), ensuring proper mask fit with double masks, and minimising idle gas flow all reduce waste. Our Nitrous Oxide Toolkit guide covers practical steps for NHS trusts and private practices.

Question 13

What is the difference between the Accutron Axess and the Porter Brown scavenging systems?

Accepted Answer

Both are AGSS systems but differ in design and application. The Accutron Axess is a compact, portable scavenging circuit ideal for mobile or multiple surgery use. The Porter Brown BS is a fixed installation system with autoclavable components, suited to practices with high-throughput sedation lists.

Question 14

Do you offer training on sedation equipment use?

Accepted Answer

R A Medical provides operator training as part of our on-site service visits. We also support dental teams through our network of manufacturer partners. Contact us to discuss training requirements for your practice or hospital.

Question 15

Can the Miniscav be used with any scavenging circuit?

Accepted Answer

The Miniscav is compatible with most standard scavenging circuits including Porter Brown, Accutron, and Cyprane systems. It provides active suction at the recommended 40–45 L/min to ensure effective waste gas removal.