Chlorine Poisoning Workup
- Author: Daniel Noltkamper, MD, FACEP; Chief Editor: Robert G Darling, MD, FACEP more...
Laboratory Studies
- Arterial blood gas: The typical abnormality is hypoxia from bronchospasm or pulmonary edema.
- Obtain serum electrolytes, BUN, and creatinine after significant exposure, as metabolic acidosis and hyperchloremia may occur.
Imaging Studies
Chest radiography
The chest radiograph findings are frequently normal initially but may exclude other causes of hypoxia in the differential.
The chest radiograph findings commonly lag behind the clinical findings of pulmonary edema.
The radiograph below shows diffuse pulmonary edema without significant cardiomegaly.
Chest radiograph of a 36-year-old chemical worker 2 hours postexposure to chlorine inhalant. She had severe resting dyspnea during the second hour, diffuse crackles/rhonchi on auscultation, and a partial pressure of oxygen of 32 mm Hg breathing room air. The radiograph shows diffuse pulmonary edema without significant cardiomegaly (used with permission from Medical Aspects of Chemical and Biological Warfare, Textbook of Military Medicine. 1997: 256). Other Tests
- Pulse oximetry can be used as a measure of oxygenation.
- Handheld peak flow meters can be used to measure the degree of bronchospasm and follow the response to treatment.
- Pulmonary function testing may be helpful to measure the degree of airway obstruction or restriction.
Procedures
- Laryngoscopy or bronchoscopy can be used to evaluate the degree of damage caused by exposure.
- The image below shows a sample of lung tissue obtained from biopsy of a patient with exposure to chlorine.
A section from a lung biopsy (hematoxylin and eosin stain; original magnification X 100) from a 36-year-old chemical worker taken 6 weeks postexposure to chlorine. At that time, the patient had no clinical abnormalities and a partial pressure of oxygen of 80 mm Hg breathing room air. The section shows normal lung tissues without evidence of interstitial fibrosis and/or inflammation (used with permission from Medical Aspects of Chemical and Biological Warfare, Textbook of Military Medicine. 1997: 256).
D'Alessandro A, Kuschner W, Wong H, Boushey HA, Blanc PD. Exaggerated responses to chlorine inhalation among persons with nonspecific airway hyperreactivity. Chest. Feb 1996;109(2):331-7. [Medline].
Baxter PJ. Gases. In: Hunter's Diseases of Occupations. 1994:213-235.
Beckett WS. Inorganic gases. In: Textbook of Clinical Occupational and Environmental Medicine. 1994:838-843.
Blanc PD, Galbo M, Hiatt P, Olson KR. Morbidity following acute irritant inhalation in a population-based study. JAMA. Aug 7 1991;266(5):664-9. [Medline].
Demeter SL, Cordasco EW. Reactive airway disease after chlorine gas exposure [letter; comment]. Chest. Sep 1992;102(3):984. [Medline].
Gjonaj ST, Lowenthal DB, Dozor AJ. Nebulized lidocaine administered to infants and children undergoing flexible bronchoscopy. Chest. Dec 1997;112(6):1665-9. [Medline].
Glindmeyer HW, Lefante JJ, Freyder LM, et al. Relationship of asthma to irritant gas exposures in pulp and paper mills. Respir Med. May 2003;97(5):541-8. [Medline].
Graham DR. Noxious gases and fumes. In: Textbook of Pulmonary Disease. 1994:901-916.
Horton DK, Berkowitz Z, Kaye WE. The public health consequences from acute chlorine releases, 1993-2000. J Occup Environ Med. Oct 2002;44(10):906-13. [Medline].
Joy RJ. Historical aspects of medical defense against chemical warfare. In: Textbook of Military Medicine: Medical Aspects of Chemical and Biologic Warfare. 1997:87-109.
Kennedy SM, Enarson DA, Janssen RG, Chang-Yeung M. Lung health consequences of reported accidental chlorine gas exposures among pulpmill workers. Am Rev Respir Dis. Jan 1991;143(1):74-9. [Medline].
Moore BB, Sherman M. Chronic reactive airway disease following acute chlorine gas exposure in an asymptomatic atopic patient. Chest. Sep 1991;100(3):855-6. [Medline].
Nelson LS. Simple asphyxiants and pulmonary irritants. In: Goldfrank's Toxicologic Emergencies. 1998:1529-1530.
Parrish JS, Bradshaw DA. Toxic inhalational injury: gas, vapor and vesicant exposure. Respir Care Clin N Am. Mar 2004;10(1):43-58. [Medline].
Rabinowitz PM, Siegel MD. Acute inhalation injury. Clin Chest Med. Dec 2002;23(4):707-15. [Medline].
Schonhofer B, Voshaar T, Kohler D. Long-term lung sequelae following accidental chlorine gas exposure. Respiration. 1996;63(3):155-9. [Medline].
Segal E, Lang E. Toxicity, Chlorine Gas. eMedicine Journal [serial online]. 2000. [Full Text].
Smart JK. History of chemical and biologic warfare: An American perspective. In: Textbook of Military Medicine: Medical Aspects of Chemical and Biologic Warfare. 1997:9-86.
Traub SJ. Respiratory agent attack (toxic inhalational injury). In: Ciottone GR. Disaster Medicine. 3rd ed. Philadelphia, PA: Mosby Elsevier; 2006:573-575/ chap 93.
Urbanetti JS. Toxic inhalational injuries. In: Textbook of Military Medicine: Medical Aspects of Chemical and Biologic Warfare. 1997:247-270.
Vinsel PJ. Treatment of acute chlorine gas inhalation with nebulized sodium bicarbonate. J Emerg Med. May-Jun 1990;8(3):327-9. [Medline].
Wadbrook PS. Advances in airway pharmacology. Emerging trends and evolving controversy. Emerg Med Clin North Am. Nov 2000;18(4):767-88. [Medline].
White CW, Martin JG. Chlorine gas inhalation: human clinical evidence of toxicity and experience in animal models. Proc Am Thorac Soc. Jul 2010;7(4):257-63. [Medline].

