In reviewing the medical history of a client scheduled for an MRI of the cervical vertebra, which information is a contraindication for this procedure?

The presence of a pacemaker is a significant contraindication for undergoing an MRI of the cervical vertebra. This is because magnetic resonance imaging utilizes strong magnetic fields and radiofrequency waves that can interfere with the function of a pacemaker. The powerful magnetic field generated during the MRI can potentially disrupt the operation of the pacemaker, which could lead to serious cardiac complications or malfunction of the device.

While a history of allergies and previous spinal surgery may require consideration and precaution, they do not outright prohibit an MRI. Allergies can often be managed with appropriate pre-medications, and previous surgical procedures might even contribute helpful information for interpretation of MRI results. Similarly, a history of kidney disease, which is particularly relevant with contrast agents used in some MRIs, does not itself contraindicate the procedure. However, it would necessitate careful assessment of whether contrast material should be used. Thus, the presence of a pacemaker presents the most direct risk during an MRI scan, making it a clear contraindication.