Magnetic resonance compatible equipment: read the small print!

Farling, P.; McBrien, M E; Winder, R. J.

doi:10.1046/j.1365-2044.2003.29682.x

Cited by 18 publications

(6 citation statements)

References 1 publication

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“…Many items in the MR environment will now be marked as MR conditional, and the conditions under which they can be safely used must accompany the device. This change of terminology has come about because of reports of injuries and problems with MR compatible equipment [3]. Conditions that define the specified MR environment include main magnetic field strength, spatial magnetic field gradient, dB/dt (time rate of change of the magnetic field), radio frequency (RF) field strength, and specific absorption rate.…”

Section: Safety Guidelines and Legislationmentioning

confidence: 99%

Safety in magnetic resonance units: an update

2010

Anaesthesia

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The number of anaesthetists who are involved in magnetic resonance (MR) units is increasing. Magnetic resonance systems are becoming more powerful and interventional procedures are now possible. This paper updates information relating to safety terminology, occupational exposure, reactions to gadolinium-based contrast agents and the risk of nephrogenic systemic fibrosis. Magnetic resonance examinations of patients with pacemakers are still generally contra-indicated but have been carried out in specialist centres under strictly controlled conditions. As availability of MR increases, so the education of anaesthetists, who are occasionally required to provide a service, must be considered.Anaesthesia in MR units was first described in the 1980s. Guidelines on the provision of anaesthetic services in MR units were published by the Association of Anaesthetists of Great Britain and Ireland (AAGBI) in 2002 [1]. Since then, the number of hospitals with MR units, and hence the number of patients requiring anaesthesia for MR, has increased. While the issues relating to setting up anaesthetic services in MR have not changed, there have been a number of developments that warrant this update:Safety terminology and guidelines have changed.MR systems utilise higher magnetic-field strengths and more open designs are available.Interventional and intra-operative MR are now routine in some centres.Mobile MR scanners are increasingly used to reduce waiting lists.Although still generally contra-indicated, some patients with pacemakers have been scanned under strictly controlled conditions in specialist centres.‘MR safe’ medical implants are now being produced.New equipment is now available for use in MR.Out-of-hours availability of MR investigations has increased.Reports of allergic reactions to MR contrast media have increased.Gadolinium based contrast agents (Gd-CAs) are associated with a varying degree of risk of nephrogenic systemic fibrosis in patients with impaired renal function.

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Section: Safety Guidelines and Legislationmentioning

confidence: 99%

Safety in magnetic resonance units: an update

2010

Anaesthesia

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“…2,7 Even MRI-conditional anesthesia machines may contain trace amounts of ferromagnetic materials, so anesthesia providers should pay close attention when working around the fringe magnetic field, even with MRI-conditional equipment. 8 As stronger and stronger magnets become more commercially available, the incumbent equipment needs to be carefully reviewed for compatibility and safety.…”

Section: Discussionmentioning

confidence: 99%

Problems With Magnetic Resonance Imaging-Conditional Anesthesia Machine During Routine Imaging: A Near-Miss Case Report

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2023

A&A Practice

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“…3). Sie wirken so als Projektil und können den Patienten verletzen [21,22,23]. In der Literatur sind Todesfälle durch in den Magneten gezogene Sauerstoffflaschen beschrieben [7].…”

Section: Potenzielle Risikenunclassified

Pitfalls in magnetic resonance imaging

et al. 2007

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The constantly extending indication spectrum of magnetic resonance imaging (MRI) is a challenge for the anaesthesiologist, who is being increasingly more consulted for assistance during the examination. Due to the special technology of MRI the anaesthetic technique differs substantially from that in the operating theatre. In addition to the permanent strong magnetic field the intermittently used high frequency impulses are also a potential danger for the patient. Patients with metal implants (e.g. cardiac pacemaker) are particularly at risk. For the safe treatment of patients during MRI a special MRI compatible anaesthesia equipment is necessary. Unsuitable devices can lead to malfunctioning or to projectile effects (attracting ferromagnetic objects into the magnet) causing injury to the patients. This paper describes the MRI technology and the associated dangers for the patient as well as the characteristics of the anaesthetic techniques.

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Magnetic resonance compatible equipment: read the small print!

Cited by 18 publications

References 1 publication

Safety in magnetic resonance units: an update

Safety in magnetic resonance units: an update

Problems With Magnetic Resonance Imaging-Conditional Anesthesia Machine During Routine Imaging: A Near-Miss Case Report

Pitfalls in magnetic resonance imaging

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