Difluoroethane toxicity - Revision history

Rossdonaldson1: /* Evaluation */

2025-12-10T23:04:54Z

Evaluation

← Older revision		Revision as of 23:04, 10 December 2025
Line 55:		Line 55:
	==Evaluation==		==Evaluation==
	===Workup===		===Workup===
	* ~~EKG~~: assess for QT prolongation, PVCs, ventricular arrhythmias		* [[ECG]]: assess for [[QT prolongation]], [[PVCs]], ventricular arrhythmias
	* Cardiac monitoring		* Cardiac monitoring
	* Chest X-ray if respiratory symptoms are present		* [[Chest X-ray]] if respiratory symptoms are present
	* Basic labs:		* Basic labs:
	** CBC, BMP, troponin		** CBC, BMP, troponin
	** Creatinine kinase (CK)		** Creatinine kinase (CK)
	** ABG if hypoxia suspected		** [[ABG]] if hypoxia suspected
	** Urine toxicology screen: may not detect difluoroethane but can help rule out co-ingestions		** [[Urine toxicology screen]]: may not detect difluoroethane but can help rule out co-ingestions

	===Diagnosis===		===Diagnosis===
	* Consider DFE toxicity in any young patient with sudden unexplained arrhythmia, altered mental status, or seizure		* Consider DFE toxicity in any young patient with sudden unexplained arrhythmia, [[altered mental status]], or [[seizure]]
	* Ask about recent use of aerosol sprays, cleaning products, or refrigerants		* Ask about recent use of aerosol sprays, cleaning products, or refrigerants
	* Look for signs of inhalant abuse:		* Look for signs of [[inhalant abuse]]:
	** Chemical odor on breath		** Chemical odor on breath
	** Perioral or hand burns		** Perioral or hand burns

Rossdonaldson1: /* Pathophysiology */

2025-12-10T23:03:36Z

Pathophysiology

← Older revision		Revision as of 23:03, 10 December 2025
Line 15:		Line 15:
	*Acts primarily as a CNS depressant		*Acts primarily as a CNS depressant
	**Volatile properties and lipid solubility allow it to penetrate the brain quickly, producing an intoxicating effect within seconds of inhalation.		**Volatile properties and lipid solubility allow it to penetrate the brain quickly, producing an intoxicating effect within seconds of inhalation.


	Key pathophysiologic effects:		Key pathophysiologic effects:

Rossdonaldson1: /* Pathophysiology */

2025-12-10T23:03:20Z

Pathophysiology

← Older revision		Revision as of 23:03, 10 December 2025
Line 12:		Line 12:

	=== Pathophysiology ===		=== Pathophysiology ===
	~~DFE is rapidly~~ absorbed through the lungs ~~and acts~~ primarily as a CNS depressant~~. Its volatile~~ properties and lipid solubility allow it to penetrate the brain quickly, producing an intoxicating effect within seconds of inhalation.		*Rapidly absorbed through the lungs
			*Acts primarily as a CNS depressant
			**Volatile properties and lipid solubility allow it to penetrate the brain quickly, producing an intoxicating effect within seconds of inhalation.

	Key pathophysiologic effects:		Key pathophysiologic effects:

	* Sensitization of myocardium to catecholamines → increased risk of fatal arrhythmias ("sudden sniffing death")		* Sensitization of myocardium to catecholamines → increased risk of fatal arrhythmias ("sudden sniffing death")
	* Hypoxia and asphyxia due to displacement of alveolar oxygen		* Hypoxia and asphyxia due to displacement of alveolar oxygen

Rossdonaldson1: /* Clinical Features */

2025-12-10T23:01:34Z

Clinical Features

← Older revision		Revision as of 23:01, 10 December 2025
Line 23:		Line 23:

	== Clinical Features ==		== Clinical Features ==
	=== Acute Presentation: ===		=== Acute Presentation ===
	* Euphoria, dizziness, slurred speech		* Euphoria, [[dizziness]], slurred speech
	* Confusion, ataxia, lethargy		* Confusion, ataxia, lethargy
	* Nausea, vomiting		* [[Nausea]], [[vomiting]]
	* Seizures, particularly in high-dose exposure		* [[Seizures]], particularly in high-dose exposure
	* Syncope or cardiac arrest (especially with exertion or catecholamine surge)		* [[Syncope]] or [[cardiac arrest]] (especially with exertion or catecholamine surge)

	=== Cardiac Effects ===		=== Cardiac Effects ===
	* Palpitations		* [[Palpitations]]
	* Premature ventricular contractions (PVCs)		* [[Premature ventricular contractions]] (PVCs)
	* Ventricular tachycardia/fibrillation		* [[Ventricular tachycardia]]/fibrillation
	* QT prolongation, possibly torsades de pointes		* [[QT prolongation]], possibly [[torsades de pointes]]

	=== Pulmonary Effects ===		=== Pulmonary Effects ===
	* Cough, dyspnea		* [[Cough]], [[dyspnea]]
	* Chemical pneumonitis		* Chemical pneumonitis
	* Pulmonary hemorrhage (in rare cases)		* [[Pulmonary hemorrhage]] (in rare cases)

	=== Chronic Use ===		=== Chronic Use ===
	* Cognitive decline		* Cognitive decline
	* Peripheral neuropathy		* [[Peripheral neuropathy]]
	* Hepatotoxicity or nephrotoxicity		* Hepatotoxicity or nephrotoxicity
	* Dermal frostbite or oronasal irritation from direct contact with aerosol can		* Dermal [[frostbite]] or oronasal irritation from direct contact with aerosol can

	==Differential Diagnosis==		==Differential Diagnosis==

Rossdonaldson1: /* Management */

2025-12-10T22:59:54Z

Management

← Older revision		Revision as of 22:59, 10 December 2025
Line 72:		Line 72:

	==Management==		==Management==
	Supportive Care:		===Supportive Care===
	* Airway, breathing, circulation (ABCs)		* Airway, breathing, circulation (ABCs)
	* Supplemental [[oxygen]] as needed		* Supplemental [[oxygen]] as needed
Line 78:		Line 78:
	* Avoid catecholamines (e.g., [[epinephrine]], [[norepinephrine]]) unless absolutely necessary—may precipitate fatal arrhythmias		* Avoid catecholamines (e.g., [[epinephrine]], [[norepinephrine]]) unless absolutely necessary—may precipitate fatal arrhythmias

	Treat Complications ~~as They Arise:~~		===Treat Complications if Applicable===
	* Ventricular arrhythmias → defibrillation, [[amiodarone]] (avoid [[lidocaine]] in some cases)		* Ventricular arrhythmias → [[defibrillation]], [[amiodarone]] (avoid [[lidocaine]] in some cases)
	* [[Seizures]] → [[benzodiazepines]]		* [[Seizures]] → [[benzodiazepines]]
	* [[Respiratory failure]] or chemical pneumonitis → consider [[intubation]] and supportive ventilation		* [[Respiratory failure]] or chemical pneumonitis → consider [[intubation]] and supportive ventilation

Rossdonaldson1: /* Referral Considerations */

2025-12-10T22:58:56Z

Referral Considerations

← Older revision		Revision as of 22:58, 10 December 2025
Line 96:		Line 96:
	* No signs of pulmonary or neurologic complications		* No signs of pulmonary or neurologic complications

	===Referral Considerations===		====Referral Considerations====
	* Substance abuse counseling or addiction medicine		* Substance abuse counseling or addiction medicine
	* Consider social work consult for adolescents or vulnerable individuals		* Consider social work consult for adolescents or vulnerable individuals

Rossdonaldson1: /* Referral Considerations= */

2025-12-10T22:58:33Z

Referral Considerations=

← Older revision		Revision as of 22:58, 10 December 2025
Line 96:		Line 96:
	* No signs of pulmonary or neurologic complications		* No signs of pulmonary or neurologic complications

	==Referral Considerations===		===Referral Considerations===
	* Substance abuse counseling or addiction medicine		* Substance abuse counseling or addiction medicine
	* Consider social work consult for adolescents or vulnerable individuals		* Consider social work consult for adolescents or vulnerable individuals

Rossdonaldson1: /* Management */

2025-12-10T22:34:21Z

Management

← Older revision		Revision as of 22:34, 10 December 2025
Line 72:		Line 72:

	==Management==		==Management==
	Supportive Care ~~is the Mainstay~~:		Supportive Care:
	* Airway, breathing, circulation (ABCs)		* Airway, breathing, circulation (ABCs)
	* Supplemental oxygen as needed		* Supplemental [[oxygen]] as needed
	* Continuous cardiac monitoring due to risk of arrhythmia		* Continuous cardiac monitoring due to risk of [[arrhythmia]]
	* Avoid catecholamines (e.g., epinephrine, norepinephrine) unless absolutely necessary—may precipitate fatal arrhythmias		* Avoid catecholamines (e.g., [[epinephrine]], [[norepinephrine]]) unless absolutely necessary—may precipitate fatal arrhythmias

	Treat Complications as They Arise:		Treat Complications as They Arise:
	* Ventricular arrhythmias → defibrillation, amiodarone (avoid lidocaine in some cases)		* Ventricular arrhythmias → defibrillation, [[amiodarone]] (avoid [[lidocaine]] in some cases)
	* Seizures → benzodiazepines		* [[Seizures]] → [[benzodiazepines]]
	* Respiratory failure or chemical pneumonitis → consider intubation and supportive ventilation		* [[Respiratory failure]] or chemical pneumonitis → consider [[intubation]] and supportive ventilation
	* Skin or mucosal injury → treat as chemical burns or frostbite		* Skin or mucosal injury → treat as [[chemical burns]] or [[frostbite]]

	==Disposition==		==Disposition==

Rossdonaldson1 at 22:32, 10 December 2025

2025-12-10T22:32:16Z

← Older revision		Revision as of 22:32, 10 December 2025
Line 4:		Line 4:
	*Though considered non-toxic for industrial use, DFE is increasingly recognized as a substance of abuse, especially among adolescents and young adults, due to its rapid-onset euphoric effects when inhaled—a practice known as "huffing."		*Though considered non-toxic for industrial use, DFE is increasingly recognized as a substance of abuse, especially among adolescents and young adults, due to its rapid-onset euphoric effects when inhaled—a practice known as "huffing."

	== Key Pearls ==		===Key Pearls===
	* Sudden cardiac death from DFE abuse can occur in previously healthy individuals.		* Sudden cardiac death from DFE abuse can occur in previously healthy individuals.
	* Always obtain an EKG and initiate cardiac monitoring.		* Always obtain an EKG and initiate cardiac monitoring.

Rossdonaldson1: /* Differential Diagnosis */

2025-12-10T22:30:09Z

Differential Diagnosis

← Older revision		Revision as of 22:30, 10 December 2025
Line 48:		Line 48:

	==Differential Diagnosis==		==Differential Diagnosis==
			{{Drugs of abuse types}}
			{{Toxic gas exposure DDX}}

	==Evaluation==		==Evaluation==