Autotransplantation

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(Redirected from
Autologous
)
For other uses of "autogenous", see Autogenesis.
"autologous" redirects here. Not to be confused with
autological
.
Autotransplantation
Autotransplantation of wisdom tooth
MeSHD014182

Autotransplantation is the

tissues, or even particular proteins from one part of the body to another in the same person (auto- meaning "self" in Greek[1]
).

The autologous tissue (also called autogenous, autogeneic, or autogenic tissue) transplanted by such a procedure is called an autograft or autotransplant.[2]

It is contrasted with allotransplantation (from other individual of the same species), syngeneic transplantation (grafts transplanted between two genetically identical individuals of the same species) and xenotransplantation (from other species).

A common example is the removal of a piece of bone (usually from the hip) and its being ground into a paste for the reconstruction of another portion of bone.

Autotransplantation, although most common with blood, bone, or skin, can be used for a wide variety of organs. One of the rare examples is autotransplantation of a kidney from one side of the body to the other. Kidney autotransplantation is used as a treatment for nutcracker syndrome.[3]

Autologous blood donation

See also: Intraoperative blood salvage

In

blood banking terminology, autologous blood donation refers to a blood donation marked for use by the donor, typically for a scheduled surgery. (Generally, the notion of "donation" does not refer to giving to oneself, though in this context it has become somewhat acceptably idiomatic.) They are commonly called "autos" by blood bank personnel, and it is one major form of the more general concept of autotransfusion (the other being intraoperative blood salvage
).

Some advantages of autologous blood donation are:

The disadvantages are:

  • Higher cost due to individualized processing, record-keeping, and management.
  • In most cases, the blood is discarded if it is not used instead of being added to the general supply.
  • Blood donation prior to colorectal cancer surgery seemed causative for a worse overall and colorectal cancer specific survival.[4]

Autologous blood is not routinely tested for infectious diseases markers such as HIV antibodies. In the United States, autologous blood is tested only if it is collected in one place and shipped to another.

There is also a risk that, in an emergency or if more blood is required than has been set aside in advance, the patient could still be exposed to donor blood instead of autologous blood. Autologous donation is also not suitable for patients who are medically unable to or advised not to give blood, such as

cardiac patients or small children and infants.[5]

Bone autograft

Illustration depicting bone autograft
See also: Bone grafting § Autologous bone grafting

In

allograft and bone morphogenetic proteins and synthetic graft materials are often used as alternatives. Autografts have long been considered the "Gold Standard" in oral surgery and implant dentistry because it offered the best regeneration results. Lately, the introduction of morphogen-enhanced bone graft substitutes have shown similar success rates and quality of regeneration; however, their price is still very high.[medical citation needed
]

Organ autotransplantation

Autotransplantation of selected organs is often preceded by ex vivo (also bench, back-table, or extracorporeal) surgery.[6] For example, ex vivo liver resection and autotransplantation is used in the treatment of selected cases of conventionally unresectable hepatic tumors.[7] It can also be implemented in rare scenarios of a blunt abdominal trauma.[8] Kidney autotransplantation is a method of a nephron-sparing renal tumor excision or complex renal artery aneurysm management.[9][10] The uses of ex vivo surgery followed by autotransplantation were reported also for heart, lungs and intestines, including multivisceral approaches.[6]

See also

References

  1. ^ "Definition of auto- in Greek | Dictionary.com". www.dictionary.com. Retrieved 2019-06-25.
  2. ^ Andreasen, J.; Paulsen, HU; Yu, Z.; Ahlquist, R (1990). A long-term study of 370 autotransplanted premolars. Part I. Surgical procedures and standardized techniques for monitoring healing. Eur J Orthod. pp. 12: 3– 13.
  3. ^ Boodman, Sandra D. (October 24, 2020). "Stomach pain was ruining her life. Then a scan provided a life-changing clue". Washington Post.
  4. S2CID 35798344
    .
  5. PMID 30243765
    – via Plum xMetrics.
  6. ^
    PMID 25358862
    .
  7. PMID 32727659
    .
  8. PMID 16508504
    .
  9. PMID 29463251
    .
  10. PMID 18804939
    .
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