Funnel-web spider bite - Revision history

Rossdonaldson1: /* See Also */

2022-05-29T13:26:12Z

Rossdonaldson1: /* Venom */

2021-11-27T02:13:47Z

Venom

← Revisión anterior		Revisión del 02:13 27 nov 2021
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	*The most clinically relevant species are restricted to Eastern Australia near Sydney and the central coast region of New South Wales and adjacent Blue Mountains.<ref>Leslie V. Boyer, Greta J. Binford, Janice A. Degan. Spider Bites. Paul S. Auerbach. In: Auerbach’s Wilderness Medicine. 7th Ed. 2017: 1002-1003.</ref>		*The most clinically relevant species are restricted to Eastern Australia near Sydney and the central coast region of New South Wales and adjacent Blue Mountains.<ref>Leslie V. Boyer, Greta J. Binford, Janice A. Degan. Spider Bites. Paul S. Auerbach. In: Auerbach’s Wilderness Medicine. 7th Ed. 2017: 1002-1003.</ref>

	==Venom==		===Venom===
	*Components of the venom include Atraxotoxin and Robustoxin which appear to induce widespread neurotransmitter release, resulting in neuromuscular and autonomic stimulation.		*Components of the venom include Atraxotoxin and Robustoxin which appear to induce widespread neurotransmitter release, resulting in neuromuscular and autonomic stimulation.

	==Clinical Features==		==Clinical Features==

Rossdonaldson1 at 02:12, 27 November 2021

2021-11-27T02:12:35Z

← Revisión anterior		Revisión del 02:12 27 nov 2021
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	==Background<ref>Leslie V. Boyer, Greta J. Binford, Janice A. Degan. Spider Bites. Paul S. Auerbach. In: Auerbach’s Wilderness Medicine. 7th Ed. 2017: 1002-1003.</ref>==		==Background==
	*Identification: Glossy black cephalothorax and velvety black abdomen, often with reddish hairs.		[[File:Funnel Web Spider.png\|200px\|thumb\|right\|Female Blue Mountains Funnel-web Spider, (Hadronyche versuta) Image: Mike Gray]]
			*Identification: Glossy black cephalothorax and velvety black abdomen, often with reddish hairs.<ref>Leslie V. Boyer, Greta J. Binford, Janice A. Degan. Spider Bites. Paul S. Auerbach. In: Auerbach’s Wilderness Medicine. 7th Ed. 2017: 1002-1003.</ref>
	**Females grow up to 4cm in length, whereas males are smaller and more delicate.		**Females grow up to 4cm in length, whereas males are smaller and more delicate.
	**Females dig a funnel shaped burrow under rocks, logs or building foundation and rarely stray, whereas males wander after reaching maturity and may enter buildings		**Females dig a funnel shaped burrow under rocks, logs or building foundation and rarely stray, whereas males wander after reaching maturity and may enter buildings
	**Aggressive behavior, 4-5mm fangs which can penetrate a chicken skull, and potent venom make these among the deadliest spiders in the world.		**Aggressive behavior, 4-5mm fangs which can penetrate a chicken skull, and potent venom make these among the deadliest spiders in the world.
	*Genus: ''Atrax'' and ''Hadronyche''		*Genus: ''Atrax'' and ''Hadronyche''<ref>Leslie V. Boyer, Greta J. Binford, Janice A. Degan. Spider Bites. Paul S. Auerbach. In: Auerbach’s Wilderness Medicine. 7th Ed. 2017: 1002-1003.</ref>
	*The most clinically relevant species are restricted to Eastern Australia near Sydney and the central coast region of New South Wales and adjacent Blue Mountains.		*The most clinically relevant species are restricted to Eastern Australia near Sydney and the central coast region of New South Wales and adjacent Blue Mountains.<ref>Leslie V. Boyer, Greta J. Binford, Janice A. Degan. Spider Bites. Paul S. Auerbach. In: Auerbach’s Wilderness Medicine. 7th Ed. 2017: 1002-1003.</ref>
	~~[[File~~:~~Funnel Web Spider~~.~~png\|200px\|thumb\|right\|Female Blue Mountains Funnel~~-~~web Spider, (Hadronyche versuta) Image: Mike Gray]]~~

	==Venom==		==Venom==
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	==References==		==References==
	<references/>		<references/>

			[[Category:Environmental]]
			[[Category:Dermatology]]

Athorne: /* Management */

2021-08-02T00:49:26Z

Management

← Revisión anterior		Revisión del 00:49 2 ago 2021
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	==Management==		==Management==
	*Pressure Immobilization Dressing		*[[Pressure Immobilization Dressing]]
	**Wrap the length of the bitten extremity with an elastic bandage		**Wrap the length of the bitten extremity with an elastic bandage
	**Splint the extremity in neutral position to immobilize		**Splint the extremity in neutral position to immobilize
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	**2-8amps total dose reported		**2-8amps total dose reported
	**No difference in dosing between adults and peds.		**No difference in dosing between adults and peds.
	**No adverse effects reported in 40 patients over 10 years		**No adverse effects reported in 40 patients over 10 years

	==Disposition==		==Disposition==

Athorne: Created page with "==BackgroundLeslie V. Boyer, Greta J. Binford, Janice A. Degan. Spider Bites. Paul S. Auerbach. In: Auerbach’s Wilderness Medicine. 7th Ed. 2017: 1002-1003.== *Id..."

2021-07-31T18:11:23Z

Created page with "==Background<ref>Leslie V. Boyer, Greta J. Binford, Janice A. Degan. Spider Bites. Paul S. Auerbach. In: Auerbach’s Wilderness Medicine. 7th Ed. 2017: 1002-1003.</ref>== *Id..."

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==Background<ref>Leslie V. Boyer, Greta J. Binford, Janice A. Degan. Spider Bites. Paul S. Auerbach. In: Auerbach’s Wilderness Medicine. 7th Ed. 2017: 1002-1003.</ref>==
*Identification: Glossy black cephalothorax and velvety black abdomen, often with reddish hairs.
**Females grow up to 4cm in length, whereas males are smaller and more delicate.
**Females dig a funnel shaped burrow under rocks, logs or building foundation and rarely stray, whereas males wander after reaching maturity and may enter buildings
**Aggressive behavior, 4-5mm fangs which can penetrate a chicken skull, and potent venom make these among the deadliest spiders in the world.
*Genus: ''Atrax'' and ''Hadronyche''
*The most clinically relevant species are restricted to Eastern Australia near Sydney and the central coast region of New South Wales and adjacent Blue Mountains.
[[File:Funnel Web Spider.png|200px|thumb|right|Female Blue Mountains Funnel-web Spider, (Hadronyche versuta) Image: Mike Gray]]

==Venom==
*Components of the venom include Atraxotoxin and Robustoxin which appear to induce widespread neurotransmitter release, resulting in neuromuscular and autonomic stimulation.

==Clinical Features==
*90% of bites will not involve significant envenomation.
*Local Symptoms:
**Intense pain, wheal with erythema at injection site, localized sweating with piloerection,
**Lasts for 30min
**Is not thought to produce skin necrosis
*Systemic Symptoms
**Earliest: Perioral tingling, diaphoresis, nausea/vomiting, salivation, and lacrimation.
**Severe:
***Pulmonary edema with dyspnea
***Peripheral neuromuscular syndrome including fasciculations, tremors, and spasms
***Impaired consciousness
***Death due to pulmonary edema, hypotension, or cardiac arrest

==Differential Diagnosis==
{{Bites and stings DDX}}

==Evaluation==
*Generally a clinical diagnosis

==Management==
*Pressure Immobilization Dressing
**Wrap the length of the bitten extremity with an elastic bandage
**Splint the extremity in neutral position to immobilize
**Immobilize victim and transport to medical care
**''If a patient presents with a tourniquet or pressure immobilization dressing, obtain IV access for potential resuscitation before removing.''
*Supportive Care
**O2, mechanical ventilation if needed
**Gentle IV fluids
**[[Atropine]] for sialorrhea bronchorrhea
*Antivenom
**Specific IgG antivenom has been developed by Commonwealth Serum Laboratories
**Empiric treatment with 2 amps (100mg/amp) of IgG in the setting of systemic signs/symptoms
**2amps repeated Q15 min until symptom resolution occurs
**2-8amps total dose reported
**No difference in dosing between adults and peds.
**No adverse effects reported in 40 patients over 10 years

==Disposition==
*May discharge those without systemic signs after period of ED observation
*Admit those with systemic signs or requiring antivenom

==See Also==
*[[Envenomations, bites and stings]]

==External Links==

==References==
<references/>

← Revisión anterior		Revisión del 13:26 29 may 2022
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	==See Also==		==See Also==
	*[[~~Envenomations,~~ bites ~~and stings~~]]		*[[Spider bites]]

	==External Links==		==External Links==