Items tagged “safety”

8 results found
Article

Contrast media extravasation

Contrast media extravasation (CMEV) refers to the leakage of intravenously-administered contrast media from the normal intravascular compartment into surrounding soft tissues; it is a well-known complication of contrast-enhanced CT. It can also occur in MRI, but the complications are rare given ...
Article

MRI contrast agent safety

Though considered safer than the frequently used iodinated contrast agents used in x-ray and CT studies, there are safety issues with MRI contrast agents as well. Paramagnetic metal ions suitable as MRI contrast agents are all potentially toxic when injected IV at or near doses needed for clinic...
Article

Iodinated contrast-induced thyrotoxicosis

Iodinated contrast-induced thyrotoxicosis is rare and may occur in patients with pre-existing thyroid disease and through complications of thyrotoxicosis (e.g. cardiac arrhythmia) may be fatal. Patients with a normal thyroid gland are unaffected.  Patients with existing thyrotoxicosis should no...
Article

Cerebral air embolism

Cerebral air embolism is rare but can be fatal. The source of emboli can be venous or arterial and is usually iatrogenic.  Clinical presentation Presentation is variable and non-specific but includes confusion, motor weakness, decreased consciousness, seizure, and loss of vision.  Pathology ...
Article

Mechanical index

The mechanical index (MI) is an attempt to measure part of an ultrasound beam's bioeffects. The mechanical index is found on most ultrasound display screens, along with the thermal index. Mechanical index is proportional to an ultrasound beam's peak negative pressure (or peak rarefaction pressu...
Article

Thermal index

The thermal index (TI) is intended as a measure of an ultrasound beam's thermal bioeffects. It is often displayed on ultrasound screens (along with the mechanical index). Absorption of sound waves may cause heating in tissue. The thermal index depends on: a measure of time-averaged acoustic p...
Article

Contrast media and breastfeeding

Contrast media and breastfeeding is an area of imaging safety that has been investigated for both iodinated and gadolinium-based contrast agents. The current guidelines do not support the cessation of breastfeeding or any special precautions after intravenous administration of these contrast med...
Article

Patient safety checklist (interventional radiology)

Patient safety has been defined as the absence of preventable harm to a patient during the process of healthcare. Patient safety checklists have been developed by interventional radiologists to govern patient safety and they are useful for the practitioner to keep in mind to ensure every patient...

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