How can we help?

You can also find more resources in our Help Center.

65 terms

Embalming Chemistry

chapter 14 embalming chemistry
STUDY
PLAY
most commonly used solvent for arterial fluids and cavity fluids
water
Hydrogen Hydroxide
Water
vehicle for embalming solutions
water
universal solvent for primary and secondary dilutions of embalming fluids
water
embalming chemistry
the study of the chemical post-mortem changes, the composition of embalming fluids, and the interaction between each
disinfection, preservation, and restoration of a dead human body
embalming process
disinfection
the killing or removal of all pathogenic organisms from a substances
temporary halting of the natural decomposition processes which occur in a body after death
preservation
killing or removal of all pathogenic organisms from a substance
disinfection
preservation
temporary halting of the natural decomposition processes which occur in a body after death
dual purpose agents
chemical agents which can both disinfect and preserve at teh same time
three families of disinfectant/preservative agents used in the manufacture of embalming fluids
aldehyde, alcohol, phenolic compounds
aldehyde compounds
formaldehyde and gluteraldehyde are two of the most common used
formaldehyde and gluteraldehyde
aldehyde compounds
alcohol compounds
3 that can be used in embalming fluids: methanol, ethanol, and secondary propanol
methanol
wood alcohol
ethanol
grain alcohol
secondary propanol
isopropyl alcohol or rubbing alcohol
phenolic compounds
(coal tar derivatives) most commonly used are phenol and cresol and lysol
phenol
carbolic acid
first action of the three families of dual purpose agents
Neutralize unstable chemical ions created created by the deamination and decarboxylization of protein and amino acids during hydrolytic autolysis
preservative demand
formaldehyde demand
formaldehyde demand
must be met in order to preserve the body
number of ions present in the dead human body at the time of embalming
formaldehyde demand
longer amount of time between death and embalming
higher formaldehyde demand
preservative residual
number of molecules of a preservative injected into the body in excess of the formaldehyde demand
purpose of injecting preservative residual
ensure that some preservative will be available if any further unexpected decomposition occurs in the body after injection fur to the pressence of copious amounts of water left behind to re-initiate hydrolytic decomposition of the protein of amino acid
number of molecules of a preservative injected into the body in excess of the preservative demand
preservative residual
higher formaldehyde demand
longer time between death and embalming
1 common action between the 3 families of dual purpose agents
inhibit the further decomposition of the body by creating a protein coagulate which is resistant to hydrolysis
preservative agents
slow down or delay the decomp for an extended period of time
presence of excessive amount of water around the protein coagulate
may dislodge the preservative from the amino acid and allow the peptide bond to be reestablished
what may dislodge the preservative from the amino acid and allow the peptide bond to be reestablished
excessive amounts of water in or around the protein coagulate
1 common action between the 3 families of dual purpose agents
inactivate the enzymes which are present in the body at the time of embalming
1 common action between the 3 famiies of dual purpose agents
kill microorganisms which are present in the body at the time of embalming
1 common action between the 3 families of dual purpose agents
destrow teh odors of decomp and prevent their further production
odor of decomp
atomized particles of the decomposing body
most often used type of preservative in embalming fluids
aldehyde family
aldehyde family
most often used type of preservative in embalming fluid
methanal
formaldehyde
most often used aldehyde
formaldehyde
colourless, water-soluble gas with a pungent, irritating odor
formaldehyde
formaldehyde is:
colourless
water-soluble gas
pungent, irritating odour
how is formaldehyde gas created
oxidation of methanol
saturated aqueous solution of formaldehyde
37% formaldehyde by weight and 40% by volume
37% formaldehyde by weight and 40% formaldehyde by volume
saturated aqeous solution of formaldehyde
Methylene glycol
formaldehyde gas molecules and water molecules combine
formaldehydegas gas molecules and water molecules combine to form
methylene glycol
unstable compounds
methylene glycol
methylene glycol molecules can return to formaldehyde and water by exposure to:
air, light, heat, and/or cold
methylene glycol polymerize into
paraformaldehyde
paraformaldehyde
solid(powder) state of formaldehyde
shaking the bottle of fluid does not return the paraformaldehyde particulates into
methylene glycol
what prevents the polymerization of methylene glycol
methyl alcohol
anti-polymerization agen in embalming fluids
methyl alcohol
formaldehyde substances have an affinity for
nitrogen based substances
lipid substances of the body
do not contain nitrogen
formaldehyde can not
embalm lipids
lipids are encased in
fibers of protein which contain nitrogen
proteins and amino acids contain
nitrogen which can be embalmed
fat is
indirectly embalmed
shell embalming
embalming fluids are allowed to follow the path of least resistance ad embalm only those tissues which are open to easy penetration
effect of shell embalming
hard on the outside and soft on the inside
superficial tissues are over embalmed or chemically seared and the deep tissues are not exposed to enough formaldehyde to cause any reasonable amount of fixation
shell embalming
avoiding shell embalming
use a low rate of flow and pressure and use a combination of continuous injection accompanied by intermittent drainage procedures