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Hi Sharyn,
With regard to using the ventilation system of the procedure room as part of the infection control measures, this is probably not possible, depending on the set up of the system.
For a patient under airborne precautions, they would be cared for in a room with negative pressure, to prevent infectious microorganisms entering the rest of the ward. For Operating theatres and procedure rooms, these have to be under positive pressure. This would mean that although the air changes would be sufficient to clear any infectious organisms from the room, they would be distributed to the rest of the hospital by air leaving the procedure room. If the room only has an ordinary air-conditioning system, this isn’t HEPA filtered and air is recycled, so this would also not be a control method that could be used.
Regards,
Sarah Bailey MSc PGDip Med Myc
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Hi Sharyn,
Many moons ago I use to work as an RN in Interventional Radiology department of a Tertiary Hospital.
When working in the MRI unit, if a patient required Airborne precautions the patient would wear a surgical mask when leaving their room on the ward until they returned back to their room. This is in line with MoH policy.
The staff would wear the P2/N95 duckbilled mask inside the scanning room with no trouble without altering the mask. The small aluminium strip didn’t pose a problem.
The surgical mask didn’t pose a problem with artefact during brain scans.
Kind Regards
Louisa Sasko
Clinical Nurse Consultant | Infection Control & Physical Health Care
Mental Health Drug & Alcohol NSLHD
Macquarie Hospital
Tel (02) 9887 5479 | Fax (02) 9887 5678 | Mob 0422 005 640
Masters Candidate | Western Sydney University | School of Nursing
Conjoint Associate Lecturer | Western Sydney University | School of Medicine
Louisa.sasko@health.nsw.gov.au
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Hi Sharyn,
I’m assuming the MRI procedure room itself had dedicated ventilation that is not shared with other areas?
If so the patient can be managed in airborne precautions during the MRI procedure and the patient does not need to wear a P2/N95 mask (which contains metal).
After entering the room the patient can remove the mask and this can be taken out of the room by staff who would be wearing a P2/N95 mask.
Once the procedure is completed the patient can be given another P2/N95 mask for transfer back to their ward/unit. This is assuming that the patient can tolerate P2/N95 mask.
If not then the same would apply if the patient was only able to wear a surgical mask (which also has metal).
Depending on the ventilation air exchange per hour in the MRI room you would also want to allow time for the ventilation to clear possible airborne contaminates from the room (i.e. TB).
See Appendix B, Table B1 – Air change/hour and time required for airborne contaminant removal efficiencies of 99% and 99.9%.
This table is in the from the USA Centers for Disease Control and Prevention – Guidelines for Environmental Infection Control in Health-Care Facilities – extract attached
Regards
Glenys
Glenys Harrington
Consultant
Infection Control Consultancy (ICC)
PO Box 5202
Middle Park
Victoria, 3206
Australia
M: +61 404 816 434
infexion@ozemail.com.au
ABN 47533508426
Dear All,
I am seeking responses (actual or hypothetical) in relation the possibility of needing to MRI scan a patient on Airborne Precautions
* What processes are in place within your MRI departments for patients on Airborne Precautions that require scanning?
* Do you know of any manufacturers that have P2/N95 mask that MRI compatible
Looking forward to your responses
Sharyn
Sharyn Hughes
Acting Clinical Nurse Consultant |Infection Prevention & Control
Royal North Shore Hospital
Reserve Rd St Leonards 2065
Tel 02 99264490
Click here Infection Prevention and Control to visit the IPAC webpage
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