Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)Burkett, Ray D.
Science
Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)
Burkett, Ray D.
Agkistrodon piscivorus; Snakes
Advocates of the L-C method warn against making incisions unless they
are absolutely necessary, the theory being that each cut permits
additional bacterial infection and does little good in removing venom.
However, McCollough and Gennaro (1963:963) demonstrated that, in bites
where the fangs had only slightly penetrated the skin, more than 50 per
cent of the venom was removed in some instances if suction was started
within three minutes after the injection. With deeper injection the
amount of venom recovered sometimes reached 20 per cent of the dose.
Stahnke suggested that an incision be made at the site of the bite only
after the site has been refrigerated for at least 30 minutes.
Stimson and Engelhardt (_loc. cit._) stated that two constricting bands
should be used between the bite and the body and that cracked ice in a
cloth should be applied to the bite before reaching a hospital. In
addition, they suggested the following procedure. Rings of incisions
should follow the swelling, and suction should continue for several
hours. After the edema has receded, the limb should be wrapped in a
towel containing crushed ice. Antivenin should be given only in severe
cases. Calcium gluconate and gas gangrene antitoxin as well as
antibiotics are helpful.
The most recent and up-to-date summary of snakebite treatment is that by
McCollough and Gennaro (1963). Following is a brief summary of their
suggestions:
1. Immobilization--Systemic immobilization is effected by body
rest and locally by splinting the bitten area.
2. Tourniquet--A lightly occlusive tourniquet during a 30- to
60-minute period of incision and suction would seem to possess
some advantages. In severe cases where medical attention is
hours away, a completely occlusive tourniquet may be necessary
to prevent death. Sacrifice of the extremity may be necessary
for the preservation of life.
3. Incision and suction--Suction should begin three to five
minutes after injection of venom if symptoms of poisoning are
present. Incisions one-fourth inch to an inch long across each
fang mark should be made in order to open the wound for more
efficient suction. Multiple incisions are not useful for the
removal of venom but may be employed under hospital conditions
to reduce subcutaneous tensions and ischemia.
4. Cryotherapy--An ice cap over the site of the bite for relief
of pain would seem to be permissible, especially prior to the
administration of antivenin. It must be remembered that cooling
during the administration of the antivenin radically reduces
the access of the antiserum to the bite area.
Public-domain text, read in full here on John Shaqi.
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