Handling Patient Emergencies During Radiopharmaceutical Therapy.

PURPOSE: Radiopharmaceutical therapy (RPT) is a rapidly growing treatment modality. Though uncommon, patients may experience complications during their RPT treatment, which may trigger a rapid response from the hospital team. However, members of this team are typically not familiar with precautions for radiation safety. During these events, it is important to prioritize the patient's health over all else. There are some practices that can help minimize the risk of radiation contamination spread and exposure to staff while tending to the patient. METHODS AND MATERIALS: We formed a team to develop a standard protocol for handling patient emergencies during RPT treatment. This team consisted of an authorized user, radiation safety officer, medical physicist, nurse, RPT administration staff, and a quality/safety coordinator. The focus for developing this standardized protocol for RPT patient emergencies was 3-fold: (1) stabilize the patient; (2) reduce radiation exposure to staff; and (3) limit the spread of radiation contamination. RESULTS: We modified our hospital's existing rapid response protocol to account for the additional staff and tasks needed to accomplish all 3 of these goals. Each team member was assigned specific responsibilities, which include serving as a gatekeeper to restrict traffic, managing the crash cart, performing chest compressions, timing chest compressions, documenting the situation, and monitoring/managing radiation safety in the area. We developed a small, easy-to-read card for rapid response staff to read while they are en route to the area so they can be aware of and prepare for the unique circumstances that RPT treatments present. CONCLUSIONS: Though rapid response events with RPT patients are uncommon, it is important to have a standardized protocol for how to handle these situations beforehand rather than improvise in the moment. We have provided an example of how our team adapted our hospital's current rapid response protocol to accommodate RPT patients.

Implementation of Magnetic Resonance Safety Program for Radiation Oncology.

During the last decade, radiation oncology departments have integrated magnetic resonance imaging (MRI) equipment, procedures, and expertise into their practices. MRI safety is an important consideration because a large percentage of patients receiving radiation therapy have histories of multiple surgeries and implanted devices. However, MRI safety guidelines and workflows were traditionally designed for radiology departments. This report presents an MR safety program designed for a radiation oncology department to address its specific needs.

Evaluation of Radioactivity in Patient Specimens Received in the Core Laboratory at a National Cancer Institute (NCI) Designated Cancer Center.

BACKGROUND: Biological specimens from patients who have received radiopharmaceuticals are often collected for diagnostic testing and sent to clinical laboratories. Residual radiation has long been assumed to be minimal. However, literature is sparse and may not represent the specimen volumes or spectrum of radionuclides currently seen at National Cancer Institute (NCI)-designated cancer centers. This study examined the radiopharmaceuticals associated with patient specimens received in the hospital core laboratory and assessed the potential risk of external radiation exposure to laboratory personnel. METHODS: The types and amounts of radiopharmaceuticals administered in a large metropolitan hospital system were retrospectively examined over a 20-month study period. The associated biological specimens sent to the largest core laboratory in the system for testing were evaluated. In addition, manual survey meter assessment of random clinical specimens and weekly wipe tests were performed for 44 weeks, and wearable and environmental dosimeters were placed for 6 months. RESULTS: Over 11 000 specimens, collected within 5 physical half-lives of radiopharmaceutical administration, were processed by our laboratory. Manual survey meter assessment of random clinical specimens routinely identified radioactive specimens. If held in a closed palm for >2 min, many samples could potentially deliver a 0.02 mSv effective dose of radiation. CONCLUSIONS: The laboratory regularly receives radioactive patient specimens without radioactive labels. Although the vast majority of these are blood specimens associated with low-dose diagnostic radiopharmaceuticals, some samples may be capable of delivering a significant amount of radiation. Recommendations for laboratories associated with NCI cancer centers are given.

Lessons Learned From the First Human Low-Field MRI Guided Radiation Therapy of the Heart in the Presence of an Implantable Cardiac Defibrillator.

Magnetic resonance imaging (MRI) guided radiation therapy is reported for the first time in a patient with an implantable cardioverter defibrillator (ICD) and cardiac fibroma in the left ventricle. Stereotactic body radiation therapy was delivered in 5 fractions at a dose of 700 cGy/fraction using a 0.35 T MRI-linear accelerator with real-time tumor tracking and beam gating. The average treatment time per fraction was 12.13 minutes, including gating dead time and gantry rotation, and the average duty cycle was 56.8%. Lessons learned included the need for MRI safety workflows that address the ICD and are tailored to the radiation oncology environment, selection of a suitable tracking target to ensure satisfactory duty cycle, and the presence of null band artifacts within the tracking target caused by ferrous components in the ICD.