Occupational doses during the injection of contrast media in paediatric CT procedures

Al-Haj, Abdalla N.; Lobriguito, Aida M.; Lagarde, C

doi:10.1093/oxfordjournals.rpd.a006129

Cited by 7 publications

(5 citation statements)

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“…Several reports have examined occupational dose to the lens of the eye in physicians performing these procedures [15,16,17,18,19,20,21,22,23] (Table 1), and special protective equipment and their effects in dose reduction [22,24,25,26]. However, while reports have already investigated nurses assisting pediatric patients in the CT room during CT scans for "diagnostic" purposes [27] or in phantom experiments [28,29], no reports have described direct measurement in medical staff assisting adult patients undergoing high-dose imaging procedures.…”

Section: Introductionmentioning

confidence: 99%

Occupational radiation dose to the lens of the eye of medical staff who assist in diagnostic CT scans

Nagamoto

Moritake

Nakagami

et al. 2021

Heliyon

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We investigated occupational dose to the lens of the eye for CT-assisting personnel for diagnostic purposes using a radio-photoluminescent glass dosimeter (RPLD) and evaluate compliance with the new equivalent dose limit for the lens of the eye (20 mSv/year). Further, we proposed the implementation of "multiple protective measures" and estimated its effect. Method: An eye lens dosimeter clip was developed specifically to attach RPLDs inside radiation safety glasses in an L-shape. Using a total of six RPLDs attached to the radiation safety glasses, the 3-mm dose-equivalent (H p (3)) to the lens of the eye for medical staff (n ¼ 11; 6 intensive care physicians, 2 pediatricians, 3 radiological technologists) who assisted patients during CT scan for "diagnostic" purpose (n ¼ 91) was measured. We evaluated the dose reduction efficiencies with radiation safety glasses and bag-valve-mask extension tube. We also estimated the protection efficiency with radiation protection curtain introduced in front of the staff's face via the phantom experiment. Results: Without wearing radiation safety glasses, H p (3) to the lens of the eye was greatest for intensive care physicians (0.49 mSv/procedure; allowing 40 procedures to be performed annually), followed by pediatricians (0.30 mSv/procedure; 66 procedures annually) and radiological technologists (0.28 mSv/procedure; 71 procedures annually). Use of each type of protective tools: radiation safety glasses (0.07-mm-Pb), bag-valve-mask extension tube (20 cm) and radiation protective curtain (0.25-mm-Pb), reduced H p (3) to the lens of the eye by 51%, 31% and 61%, respectively. Conclusion: Intensive care physicians perform most assisted ventilations with the bag-valve-mask during "diagnostic" CT scans, and may exceed the equivalent dose limit for the lens of the eye if radiation safety glasses are not worn. If "multiple protective measures" are implemented, compliance with the equivalent dose limit for the lens of the eye should be achievable without placing significant burdens on physicians or medical institutions.

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Section: Introductionmentioning

confidence: 99%

Occupational radiation dose to the lens of the eye of medical staff who assist in diagnostic CT scans

Nagamoto

Moritake

Nakagami

et al. 2021

Heliyon

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“…Many studies have investigated the occupational radiation dose in interventional radiology (IR), wherein medical staff may be exposed to considerable scattered X-rays. However, few studies have discussed occupational radiation dose in CT examinations [1][2][3][4][5][6]12]. Our literature search did not reveal any report that directly investigated the radiation dose of eye lens as H p (3).…”

Section: Introductionmentioning

confidence: 94%

“…Medical staff members (e.g., physicians, nurses and radiological technologists) occasionally remain in the CT examination room during irradiation to monitor the injection of the contrast media, to restrain the patient, operate medical devices, etc. [1][2][3][4][5][6]. These actions are performed for medical safety/procedures or maintaining image quality.…”

Section: Introductionmentioning

confidence: 99%

Occupational Radiation Dose, Especially for Eye Lens: Hp(3), in Medical Staff Members Involved in Computed Tomography Examinations

Osanai

Sato²,

Sato

et al. 2021

Applied Sciences

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Radiation dose management of medical staff has become increasingly important. Particularly, based on the statement by the International Commission on Radiological Protection (ICRP) in 2011, a new lower equivalent dose limit for the eye lens is being established in each country. Although many reports have discussed the occupational radiation dose in interventional radiology (IR), few studies have examined the dose during computed tomography (CT) examinations. This study investigated the radiation dose exposure to medical staff present in the CT room during irradiation, with particular focus on the exposure to eye lens. The radiation dose exposure to those who assist patients during head, chest and upper abdomen CT examination was measured in a phantom study. The radiation dose exposure with scattered radiation was never negligible (i.e., high); Hp(3) was the highest in head CT examination, at 0.44 mSv per examination. Furthermore, the shielding effect of radiation protection glasses was large, and radiation protection glasses are useful tools for the medical staff who are involved in CT examinations. The justification and optimisation should be carefully considered in assistant actions.

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“…Radiologists or nurses intermittently stay at the patient's side during the acquisition of computed tomography (CT) data because of the need to supervise the patient during the injection of contrast media, to physically restrain the patient, to provide nursing care, or to give instructions to the patient (Al-Haj et al 2003;Kobayashi et al 2012). These actions, which were defined as "entrance actions," are performed at the discretion of the individual or because they are mandatory (Theumann et al 1999).…”

Section: Introductionmentioning

confidence: 99%

Investigation of Qualitative and Quantitative Factors Related to Radiological Exposure to Nursing Staff During Computed Tomography Examinations

Mori¹,

Koshida

Ishigamori

et al. 2014

Health Physics

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Radiologists or nurses intermittently stay in computed tomography rooms during computed tomography examinations; these actions are defined as “entrance actions.” The qualitative and quantitative factors related to radiological exposure to computed tomography nursing staff were investigated to identify the protective measures against entrance actions. A questionnaire survey was used to investigate the frequency, motives, and causalities of entrance actions. Individual and area monitoring were simultaneously performed. The mean frequency of entrance actions was 1.2 times mo(−1). The primary motive for entrance actions was to dispel anxieties regarding collateral accidents during computed tomography. The nursing staff particularly engaged in close supervision to help the patients cope with contrast media extravasation. The average personal dose equivalent [Hp(10)] to the nurses was 0.21 mSv mo(−1). The ambient dose equivalent [H*(10)] rate was 1.4–3.7 mSv min(−1) at a distance of 1 m from CT gantry centre. Avoidance of entrance actions and collateral accidents would decrease the occupational exposures to nurses.

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Occupational doses during the injection of contrast media in paediatric CT procedures

Cited by 7 publications

References 0 publications

Occupational radiation dose to the lens of the eye of medical staff who assist in diagnostic CT scans

Occupational radiation dose to the lens of the eye of medical staff who assist in diagnostic CT scans

Occupational Radiation Dose, Especially for Eye Lens: Hp(3), in Medical Staff Members Involved in Computed Tomography Examinations

Investigation of Qualitative and Quantitative Factors Related to Radiological Exposure to Nursing Staff During Computed Tomography Examinations

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