Assessment of radiofrequency radiation exposure level from selected base transceiver stations in Ogbomoso, Oyo State, Nigeria

Thermal manikin tests were performed on selected protective garments to assess their heat transfer properties during exposure to infrared heat radiation. Comparing a newly developed Infrared (IR) Heat Radiation attenuatuion vest with a standard winter jacket, it could be seen that that the IR Vest provided a thermal comfort benefit above a heat radiation exposure level of 150 Watts while the winter jacket provided a thermal benefit above a 450 Watt heat radiation exposure level. The study identified important temperature cross-over points which define the thermodynamic properties and also characterize the heat radiation attenuation and heat insulation properties of garments. The evaluation method is seen as a new design tool for optimizing garment comfort and safety.

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Radiation exposure during C-arm-guided (fluoroscopy) small animal orthopaedic surgery

Veterinární Medicína ◽

10.17221/15/2018-vetmed ◽

2018 ◽

Vol 63 (No. 11) ◽

pp. 527-531

Author(s):

S. Sung ◽

S. Lim ◽

K. Min ◽

Y. Jung ◽

Y. Cho ◽

...

Keyword(s):

Radiation Exposure ◽

Orthopaedic Surgery ◽

Small Animal ◽

Exposure Dose ◽

Exposure Level ◽

Body Parts ◽

Thermoluminescent Dosimeters ◽

Protective Devices ◽

A Prospective Study ◽

Operating Surgeon

The purpose of the current study was to investigate the radiation exposure level of surgeons performing C-arm guided small animal orthopaedic surgery using thermoluminescent dosimeters located inside and outside personnel shielding devices at major body parts. A prospective study was conducted to measure the radiation exposure dose of individuals in three positions (first assistant, operating surgeon and anaesthesiologist) using thermoluminescent dosimeters placed inside and outside protective devices. The lead equivalent protective devices included panorama mask, thyroid shield, apron and arm shield placed at five anatomic sites (eye, thyroid, breast, gonad and hand). Radiation exposure was measured during 12 surgical procedures with mean kVp of 51 and mean mAs of 1.6. The equivalent doses for thyroid, breast and gonad (outside/inside in mSv) were 1.75/0.58, 2.01/0.13 and 3.03/0.11, respectively, for the first assistant and 1.69/1.46, 4.82/0.35 and 5.25/0.22 for the operating surgeon. The dose of eye, thyroid, breast, gonad and arm for the anaesthesiologist were 0.61/0.51, 0.35/0.3, 0.67/0.34, 0.72/0.29 and 0.62/0.35, respectively. The exposure dose to gonads outside the lead protection showed the highest values in all participants. With lead protection, there was a significant reduction in the exposure dose to the gonads (first assistant, 96%; operating surgeon, 96%; anaesthesiologist, 60%). These results suggest that a radiation shield is essential in veterinary surgery with C-arms, particularly for gonad protection. In addition, these results demonstrate that exposure dose decreases with increasing distance from the C-arm machine.

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Does a fluoro-assisted direct anterior approach for total hip arthroplasty pose an excessive risk of radiation exposure to the surgeon?

SICOT-J ◽

10.1051/sicotj/2020004 ◽

2020 ◽

Vol 6 ◽

pp. 6

Author(s):

Yuta Jinnai ◽

Tomonori Baba ◽

Xu Zhuang ◽

Hiroki Tanabe ◽

Sammy Banno ◽

...

Keyword(s):

Total Hip Arthroplasty ◽

Radiation Exposure ◽

Anterior Approach ◽

Direct Anterior Approach ◽

Proximal Femoral Fracture ◽

Fluoroscopy Time ◽

Exposure Level ◽

Intraoperative Fluoroscopy ◽

Significant Difference ◽

The Mean

Introduction: Intraoperative fluoroscopy can be easily used because patients are placed in the supine position during total hip arthroplasty via direct anterior approach (DAA-THA) to reduce complications. However, the cumulative level of radiation exposure by intraoperative fluoroscopy increases as the annual number of cases increases, increasing the risk of influencing the health of both the patients and medical workers. The objective of the study was to compare the radiation exposure time of DAA-THA with osteosynthesis and to determine if the level of radiation exposure exceeded safety limits. Material and methods: DAA-THA was performed in 313 patients between January 2016 and July 2018 and 60 patients with proximal femoral fracture were treated with osteosynthesis. The intraoperative fluoroscopy time was retrospectively surveyed and compared between these two groups. A total of eight surgeons operated DAA-THA employing the same procedure using a traction table. A total of nine surgeons operated osteosynthesis and fluoroscopy was appropriately used during reduction and implant insertion. Results: The mean operative time of DAA-THA was 103.3 min and that of osteosynthesis was 83.3 min, showing a significant difference (p < 0.05). The mean intraoperative fluoroscopy time was 0.83 min (SD ± 0.68) in DAA-THA and 8.91 min (SD ± 8.34) in osteosynthesis showing a significant difference (p < 0.05). Conclusions: The intraoperative exposure level was significantly lower and the fluoroscopy time was significantly shorter in DAA-THA than in osteosynthesis for proximal femoral fracture. It was clarified that the annual cumulative radiation exposure level in DAA-THA does not exceed the tissue dose limit.

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