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Galipeau N, Sugarman SL, Waller E. Local Dose Coefficients for Radionuclide Contamination in Wounds. HEALTH PHYSICS 2023; Publish Ahead of Print:00004032-990000000-00089. [PMID: 37294949 DOI: 10.1097/hp.0000000000001704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
ABSTRACT When a radiation accident has occurred that leads to radioactive material being imparted to a wound, this is treated as an internal contamination scenario. It is common for the material to transport throughout the body based upon biokinetics of the material in the body. While standard internal dosimetry approaches can be used to estimate committed effective dose from the insult, some material may get fixed for longer periods of time at the wound location, even after medical procedures such as decontamination and debridement have been applied. In this case, the radioactive material becomes a local dose contributor. This research was to generate local dose coefficients for radionuclide-contaminated wounds to supplement committed effective dose coefficients. These dose coefficients can be used to calculate activity limits at the wound site that could lead to a clinically significant dose. This is useful for emergency response to assist in decisions on medical treatment, including decorporation therapy. Wound models were created for injections, lacerations, abrasions, and burns, and the MCNP radiation transport code was used to simulate the dose to tissue considering 38 radionuclides. Biokinetic models accounted for biological removal of the radionuclides from the wound site. It was found that radionuclides that are not retained well at the wound site are likely of little concern locally, but for highly retained radionuclides, estimated local doses may require further investigation by medical and health physics personnel.
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Affiliation(s)
- Natasha Galipeau
- Department of Energy and Nuclear Engineering, Ontario Tech University, 2000 Simcoe Stree North, Oshawa, Ontario, L1G 0C5
| | - Stephen L Sugarman
- SummitET (Summit Exercises and Training), 111 2nd Avenue NE, Suite 354, St. Petersburg, FL 33701
| | - Edward Waller
- Department of Energy and Nuclear Engineering, Health Physics and Environmental Safety, Ontario Tech University, 2000 Simcoe Street North, Oshawa, Ontario, L1G 0C5
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Poudel D, Dumit S, Klumpp JA. Effectiveness of Surgical Excision Following Plutonium-contaminated Wounds: Inferences from Historical Cases. HEALTH PHYSICS 2023; 124:462-474. [PMID: 36880975 DOI: 10.1097/hp.0000000000001686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
ABSTRACT As with any medical treatment, the decision to excise a wound contaminated with actinides is a risk-benefit analysis. The potential benefits of surgical excision following such contaminated wounds are reduction in the probability of stochastic effects, avoidance of local effects, and psychological comfort knowing that radioactive material deposited in the wound is prevented from being systemic. These benefits should be balanced against the potential risks such as pain, numbness, infection, and loss of function due to excision. To that end, the responsibility of an internal dosimetrist is to provide advice to both the patient and the treating physician about the likely benefits of excision that include, but not limited to, averted doses. This paper provides a review of the effectiveness of surgical excisions following plutonium-contaminated wounds and finds that excisions are highly effective at removing plutonium from wounds and at averting the doses they would have caused.
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Affiliation(s)
- Deepesh Poudel
- Radiation Protection Division, Los Alamos National Laboratory, Los Alamos, NM
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Lamart S, Van der Meeren A, Coudert S, Baglan N, Griffiths NM. DTPA Treatment of Wound Contamination in Rats with Americium: Evaluation of Urinary Profiles Using STATBIODIS Shows Importance of Prompt Administration. HEALTH PHYSICS 2021; 120:600-617. [PMID: 33577223 DOI: 10.1097/hp.0000000000001384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
ABSTRACT In the nuclear industry, wound contamination with americium is expected to increase with decommissioning and waste management. Treatment of workers with diethylenetriaminepentaacetic acid (DTPA) requires optimization to reduce internal contamination and radiation exposure. This work aimed at evaluating and comparing different DTPA protocol efficacies after wound contamination of rats with americium. Wound contamination was simulated in rats by depositing americium nitrate in an incision in the hind limb. Different routes, times, and frequencies of DTPA administration were evaluated. Individual daily urinary americium excretion and tissue retention were analyzed using the statistical tool STATBIODIS. Urinary profiles, urinary enhancement factors, and inhibition percentages of tissue retention were calculated. A single DTPA administration the day of contamination induced a rapid increase in americium urinary excretion that decreased exponentially over 7 d, indicating that the first DTPA administration should be delivered as early as possible. DTPA treatment limited americium uptake in systemic tissues irrespective of the protocol. Liver and skeleton burdens were markedly reduced, which would drive reduction of radiation dose. Local or intravenous injections were equally effective. Inherent difficulties in wound site activity measurements did not allow identification of a significant decorporating effect at the wound site. Repeated intravenous injections of DTPA also increased americium urinary excretion, which supports the use of multiple DTPA administrations shortly after wound contamination. Results from these statistical analyses will contribute to a better understanding of americium behavior in the presence or absence of DTPA and may aid optimization of treatment for workers.
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Affiliation(s)
| | - Anne Van der Meeren
- Laboratoire de Radio Toxicologie, CEA, Université Paris-Saclay, 91297 Arpajon, France
| | - Sylvie Coudert
- Laboratoire de Radio Toxicologie, CEA, Université Paris-Saclay, 91297 Arpajon, France
| | - Nicolas Baglan
- Laboratoire de Radio Toxicologie, CEA, Université Paris-Saclay, 91297 Arpajon, France
| | - Nina M Griffiths
- Laboratoire de Radio Toxicologie, CEA, Université Paris-Saclay, 91297 Arpajon, France
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Lamart S, Van der Meeren A, Grémy O, Miccoli L, Coudert S, Dubois S, Bibard S, Serond AP, Angulo JF, Griffiths NM. Americium biodistribution in rats after wound contamination with different physicochemical forms in the presence or absence of plutonium: analyses using STATBIODIS. JOURNAL OF RADIOLOGICAL PROTECTION : OFFICIAL JOURNAL OF THE SOCIETY FOR RADIOLOGICAL PROTECTION 2019; 39:707-738. [PMID: 31223133 DOI: 10.1088/1361-6498/ab076b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Americium (Am) biodistribution data obtained after wound contamination in rats were analysed to evaluate and quantify the influence of different physicochemical forms of Am in the presence or absence of plutonium (Pu). The biodistribution data were individual Am daily urinary excretion and tissue retention. The data were analysed with STATBIODIS, a statistical tool developed in the laboratory and based on the R language. Non-parametric methods were selected to comply with the data characteristics. Am systemic tissue retention and urinary excretion data were much greater for contamination with soluble physicochemical forms than insoluble forms. Meanwhile, Am relative biodistribution between the main retention tissues (skeleton, liver and kidney) remained the same. Hence, after absorption into blood the radionuclide behaviour was independent of the physicochemical form. The presence of Pu did not change the Am biodistribution. Comparisons of the biodistribution data from the laboratory with mean values published by other laboratories showed that soluble to moderately soluble forms of Am resulted in similar urine excretion after contamination, whether it was intravenous, intramuscular, subcutaneous injection or incision. Findings from this work will contribute to improve the understanding and interpretation of wound contamination cases with different physicochemical forms and mixtures of actinides including Am.
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Affiliation(s)
- Stephanie Lamart
- Laboratoire de Radio Toxicologie, CEA, Université Paris-Saclay, 91297 Arpajon, France
| | - Anne Van der Meeren
- Laboratoire de Radio Toxicologie, CEA, Université Paris-Saclay, 91297 Arpajon, France
| | - Olivier Grémy
- Laboratoire de Radio Toxicologie, CEA, Université Paris-Saclay, 91297 Arpajon, France
| | - Laurent Miccoli
- Laboratoire de Radio Toxicologie, CEA, Université Paris-Saclay, 91297 Arpajon, France
| | - Sylvie Coudert
- Laboratoire de Radio Toxicologie, CEA, Université Paris-Saclay, 91297 Arpajon, France
| | | | - Solveig Bibard
- Laboratoire de Radio Toxicologie, CEA, Université Paris-Saclay, 91297 Arpajon, France
| | | | - Jaime F Angulo
- Laboratoire de Radio Toxicologie, CEA, Université Paris-Saclay, 91297 Arpajon, France
| | - Nina M Griffiths
- Laboratoire de Radio Toxicologie, CEA, Université Paris-Saclay, 91297 Arpajon, France
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Dumit S, Avtandilashvili M, Strom DJ, McComish SL, Tabatadze G, Tolmachev SY. Improved Modeling of Plutonium-DTPA Decorporation. Radiat Res 2018; 191:201-210. [DOI: 10.1667/rr15188.1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Sara Dumit
- U.S. Transuranium and Uranium Registries, Washington State University, Richland, Washington 99354–4959
| | - Maia Avtandilashvili
- U.S. Transuranium and Uranium Registries, Washington State University, Richland, Washington 99354–4959
| | - Daniel J. Strom
- U.S. Transuranium and Uranium Registries, Washington State University, Richland, Washington 99354–4959
| | - Stacey L. McComish
- U.S. Transuranium and Uranium Registries, Washington State University, Richland, Washington 99354–4959
| | - George Tabatadze
- U.S. Transuranium and Uranium Registries, Washington State University, Richland, Washington 99354–4959
| | - Sergei Y. Tolmachev
- U.S. Transuranium and Uranium Registries, Washington State University, Richland, Washington 99354–4959
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Poudel D, Bertelli L, Klumpp JA, Waters TL. Some Considerations for Chelation Treatment and Surgical Excision Following Incorporation of Plutonium in Wounds. HEALTH PHYSICS 2018; 114:307-318. [PMID: 29360709 DOI: 10.1097/hp.0000000000000772] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
After a plutonium-contaminated wound, the role of an internal dosimetrist is to inform the patient and the physician of the dosimetric considerations. The doses averted due to medical treatments (excision or chelation) are higher if the treatments are administered early; therefore, the internal dosimetrist needs to rely on limited information on wound counts and process knowledge for advising the physician. Several wound cases in the literature were reviewed to obtain estimates of the efficacies of surgical excision and chelation treatment after plutonium-contaminated wounds. The dose coefficients calculated by coupling the NCRP 156 wound model with the systemic model were used to derive the decision guidelines that may indicate medical treatment based on 1) the concept of saved doses proposed by the NCRP 156 wound model, 2) the limits recommended by the CEC/DOE guidebook, and 3) the Clinical Decision Guidelines proposed in NCRP Report No. 161. These guidelines by themselves, however, are of limited use for several reasons, including 1) large uncertainties associated with wound measurements, 2) exposure to forms of radionuclides that cannot be assigned to a single category in the NCRP 156 framework, 3) inability of the NCRP 156 model to explain some of the wound cases in the literature, 4) neglect of the local doses to the wound site and the pathophysiological response of the tissue, 5) poorly understood relationship between effective doses and risks of late health effects, and 6) disregard of the psychological aspects of radionuclide intake.
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Affiliation(s)
- Deepesh Poudel
- *Radiation Protection Division, Los Alamos National Laboratory, Los Alamos, NM 87545
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Poudel D, Klumpp JA, Waters TL, Bertelli L. ANALYSIS OF URINARY EXCRETION DATA FROM THREE PLUTONIUM-CONTAMINATED WOUNDS AT LOS ALAMOS NATIONAL LABORATORY. RADIATION PROTECTION DOSIMETRY 2018; 178:170-178. [PMID: 28985423 DOI: 10.1093/rpd/ncx090] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Accepted: 06/21/2017] [Indexed: 06/07/2023]
Abstract
The National Council on Radiation Protection (NCRP)-156 Report proposes seven different biokinetic models for wound cases depending on the physicochemistry of the contaminant. Because the models were heavily based on experimental animal data, the authors of the report encouraged application and validation of the models using bioassay data from actual human exposures. Each of the wound models was applied to three plutonium-contaminated wounds, and the models resulted in a good agreement to only one of the cases. We then applied a simpler biokinetic model structure to the bioassay data and showed that fitting the transfer rates from this model structure yielded better agreement with the data than does the best-fitting NCRP-156 model. Because the biokinetics of radioactive material in each wound is different, it is impractical to propose a discrete set of model parameters to describe the biokinetics of radionuclides in all wounds, and thus each wound should be treated empirically.
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Affiliation(s)
- Deepesh Poudel
- Radiation Protection Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - John A Klumpp
- Radiation Protection Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - Tom L Waters
- Radiation Protection Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - Luiz Bertelli
- Radiation Protection Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
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Avtandilashvili M, Dumit S, Tolmachev SY. USTUR WHOLE-BODY CASE 0212: 17-YEAR FOLLOW-UP OF PLUTONIUM CONTAMINATED WOUND. RADIATION PROTECTION DOSIMETRY 2018; 178:160-169. [PMID: 28985407 DOI: 10.1093/rpd/ncx092] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Accepted: 06/23/2017] [Indexed: 06/07/2023]
Abstract
The National Council of Radiation Protection and Measurements' (NCRP) wound model was applied to the bioassay data from a United States Transuranium and Uranium Registries' whole-body tissue donor, Case 0212. This individual was exposed to plutonium nitrate as a result of an occupational wound injury and he underwent extensive chelation treatment with Ca-DTPA. All major soft tissues and bones were collected post-mortem and radiochemically analyzed for 238Pu, 239,240Pu and 241Am. The 239,240Pu activity in the total body was estimated to be 232.0 Bq, with 80.3 Bq retained in the liver, 115.1 Bq in the skeleton and 14.3 Bq in the wound. The maximum likelihood method was used to simultaneously fit the 'post-treatment' urinary excretion and post-mortem liver and skeleton retention data. It was demonstrated that the deposited material was predominantly a strongly retained soluble compound (nitrate) with a 22% fraction of plutonium particles. The residual intake, the amount of plutonium deposited in the wound that was not removed from the system by Ca-DTPA, was estimated to be 288 Bq. The resulting committed effective dose was 134 mSv. Accounting for plutonium eliminated in the urine during chelation therapy, the actual 'untreated' intake was 1204 Bq, and the projected committed effective dose was 567 mSv. Hence, DTPA treatment reduced the dose by a factor of 4.
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Affiliation(s)
- Maia Avtandilashvili
- US Transuranium and Uranium Registries, Washington State University, 1845 Terminal Drive, Suite 201, Richland, WA 99354-4959, USA
| | - Sara Dumit
- US Transuranium and Uranium Registries, Washington State University, 1845 Terminal Drive, Suite 201, Richland, WA 99354-4959, USA
| | - Sergei Y Tolmachev
- US Transuranium and Uranium Registries, Washington State University, 1845 Terminal Drive, Suite 201, Richland, WA 99354-4959, USA
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Yoshii H, Yanagihara K, Imaseki H, Hamano T, Yamanishi H, Inagaki M, Sakai Y, Sugiura N, Kurihara O, Sakai K. Methodology using a portable X-ray fluorescence device for on-site and rapid evaluation of heavy-atom contamination in wounds: a model study for application to plutonium contamination. PLoS One 2014; 9:e101966. [PMID: 25010749 PMCID: PMC4092075 DOI: 10.1371/journal.pone.0101966] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Accepted: 06/13/2014] [Indexed: 11/18/2022] Open
Abstract
Workers decommissioning the Fukushima-Daiichi nuclear power plant damaged from the Great East Japan Earthquake and resulting tsunami are at risk of injury with possible contamination from radioactive heavy atoms including actinides, such as plutonium. We propose a new methodology for on-site and rapid evaluation of heavy-atom contamination in wounds using a portable X-ray fluorescence (XRF) device. In the present study, stable lead was used as the model contaminant substitute for radioactive heavy atoms. First, the wound model was developed by placing a liquid blood phantom on an epoxy resin wound phantom contaminated with lead. Next, the correlation between the concentration of contaminant and the XRF peak intensity was formulated considering the thickness of blood exiting the wound. Methods to determine the minimum detection limit (MDL) of contaminants at any maximal equivalent dose to the wound by XRF measurement were also established. For example, in this system, at a maximal equivalent dose of 16.5 mSv to the wound and blood thickness of 0.5 mm, the MDL value for lead was 1.2 ppm (3.1 nmol). The radioactivity of 239Pu corresponding to 3.1 nmol is 1.7 kBq, which is lower than the radioactivity of 239Pu contaminating puncture wounds in previous severe accidents. In conclusion, the established methodology could be beneficial for future development of a method to evaluate plutonium contamination in wounds. Highlights: Methodology for evaluation of heavy-atom contamination in a wound was established. A portable X-ray fluorescence device enables on-site, rapid and direct evaluation. This method is expected to be used for evaluation of plutonium contamination in wounds.
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Affiliation(s)
- Hiroshi Yoshii
- Research Center for Radiation Emergency Medicine, National Institute of Radiological Science, Chiba, Chiba, Japan
| | - Kouta Yanagihara
- Research Center for Radiation Emergency Medicine, National Institute of Radiological Science, Chiba, Chiba, Japan
- Department of Physics, Faculty of Science, Toho University, Funabashi, Chiba, Japan
| | - Hitoshi Imaseki
- Research Center for Radiation Emergency Medicine, National Institute of Radiological Science, Chiba, Chiba, Japan
| | - Tsuyoshi Hamano
- Research Center for Radiation Emergency Medicine, National Institute of Radiological Science, Chiba, Chiba, Japan
| | - Hirokuni Yamanishi
- Atomic Energy Research Institute, Kinki University, Higashi-Osaka, Osaka, Japan
| | - Masayo Inagaki
- Atomic Energy Research Institute, Kinki University, Higashi-Osaka, Osaka, Japan
| | - Yasuhiro Sakai
- Department of Physics, Faculty of Science, Toho University, Funabashi, Chiba, Japan
| | - Nobuyuki Sugiura
- Radiation Environmental Effects Research Center, Nuclear Safety Research Association, Shinbashi, Minato, Tokyo, Japan
| | - Osamu Kurihara
- Research Center for Radiation Emergency Medicine, National Institute of Radiological Science, Chiba, Chiba, Japan
| | - Kazuo Sakai
- Research Center for Radiation Emergency Medicine, National Institute of Radiological Science, Chiba, Chiba, Japan
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Griffiths NM, Coudert S, Wilk JC, Renault D, Angulo JF, Van der Meeren A. Combined drug and surgery treatment of plutonium-contaminated wounds: indications obtained using a rodent model. HEALTH PHYSICS 2014; 106:638-644. [PMID: 24776894 DOI: 10.1097/hp.0000000000000088] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
There is an important requirement following accidental actinide contamination of wounds to limit the dissemination and retention of such alpha-emitting radionuclides. To reduce wound and systemic contamination, treatment approaches include chelation therapy with or without wound excision. However, it has been hypothesized that wound excision could lead to increased contaminant release and systemic organ retention. This study in the rat addresses this question. Anesthetized rats were contaminated with plutonium nitrate following wounding by deep incision of hind leg muscle. Excision of tissue at the contaminated site was performed 7 d later with or without Diethylene Triamine Pentaacetic Acid (DTPA) treatment (30 μmol kg⁻¹ i.v.). Pu urinary excretion was then measured for a further 3 d, and animals were euthanized at 14 d after contamination. Tissue samples were evaluated for Pu activity and histology. At 7 d after contamination, around 50% of the initial activity remained at the wound site. An average of 16% of this activity was then removed by surgery. Surgery alone resulted in increased urinary excretion, suggesting release from the wound site, but no subsequent increases in organ retention (bone, liver) were observed at 14 d. Indeed, organ Pu activity was slightly reduced. The combination of surgery and DTPA or DTPA treatment alone was much more effective than excision alone as shown by the markedly increased urinary Pu excretion and decreased tissue levels. This is the first report in an experimental rodent model of resection of Pu-contaminated wound. Urinary excretion data provide evidence for the release of activity as a result of surgery, but this does not appear to lead to further Pu organ retention. However, a combination of prior DTPA treatment with wound excision is particularly effective.
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Affiliation(s)
- Nina M Griffiths
- *Laboratoire de RadioToxicologie, CEA/DSV/iRCM, Bruyères le Châtel, 91297 ARPAJON, France
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Griffiths NM, Coudert S, Renault D, Wilk JC, Van der Meeren A. Actinide handling after wound entry with local or systemic decorporation therapy in the rat. Int J Radiat Biol 2014; 90:989-95. [PMID: 24456546 DOI: 10.3109/09553002.2014.886797] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Treatment of actinide-contaminated wounds may be problematic because of contaminant physicochemical properties, dissemination and anatomical localization. This study investigates different chelation/resection protocols after contamination of rats with americium (Am) or plutonium (Pu) nitrate or mixed oxide (MOX; uranium (U), Pu oxide). METHODS Anesthetized rats were contaminated with Am or Pu nitrate (moderately soluble) or MOX (insoluble) following wounding of hind leg muscle. DTPA (diethylene triamine pentaacetic acid) treatment (30 μmol/kg) was immediate or delayed, systemic or local and combined or not with wound resection. Actinide urinary and tissue levels were measured. RESULTS Comparison of Pu nitrate and MOX dissemination at the wound site indicated a more heterogeneous localization of MOX particles. In all cases DTPA treatment reduced target tissue (bone, liver) activity levels even if DTPA treatment was started 7 days after contamination. Surgery alone increased urinary excretion suggesting release from the wound site but no subsequent increases in organ retention (bone, liver) were observed. The combination of surgery and DTPA increased Pu excretion and reduced tissue levels markedly. CONCLUSION This rodent model of actinide wound contamination has been used to test different treatments. It provides evidence of activity release as a result of surgery that seems not to lead to increased organ retention.
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Affiliation(s)
- Nina M Griffiths
- Laboratoire de RadioToxicologie , CEA/DSV/iRCM, Bruyères le Châtel, 91297 Arpajon , France
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