Baricity

Baricity

Baricity refers to the density of a substance compared to the density of human cerebral spinal fluid. Baricity is used in anesthesia to determine the manner in which a particular drug will spread in the intrathecal space.

Solutions that have a baricity approaching 1.000 are referred to as isobaric, as the density of the cerebral spinal fluid is approximately 1.0003+/- 0.0003. Solutions with a baricity less than 0.999 are termed hypobaric, and are usually created by mixing the local anesthetic with distilled water. Hyperbaric solutions are created by mixing dextrose 5-8% with the desired local anesthetic.

Hyperbaric solutions will flow in the direction of gravity and settle in the most dependent areas of the intrathecal space. Conversely, hypobaric mixtures will rise in relation to gravitational pull. These properties allow the anesthesia provider to preferentially control the spread of the block by choice of mixture and patient positioning.cite book |author=Barash, Paul G.; Cullen, Bruce F.; Stoelting, Robert K. F|title= Clinical Anesthesia |publisher=Lippincott-Raven |location=Phila,USA |year=1997 |pages= |isbn=0-397-51482-4|oclc= |doi=]

References


Wikimedia Foundation. 2010.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • baricity — noun The density of a substance compared to the density of human cerebral spinal fluid. Baricity is used in anesthesia to determine the manner in which a particular drug will spread in the intrathecal space …   Wiktionary

  • baricity — The weight of one substance compared to the weight of an equal volume of another substance at the same temperature. [G. baros, weight] …   Medical dictionary

  • Cerebrospinal fluid — 4 vials of CSF Cerebrospinal fluid (CSF), Liquor cerebrospinalis, is a clear, colorless, salty bodily fluid, that occupies the subarachnoid space and the ventricular system around and inside the brain and spinal cord. In essence, the brain floats …   Wikipedia

  • Spinal anaesthesia — Spinal analgesia, (or commonly called spinal anesthesia or sub arachnoid block (S.A.B.)) is a form of regional anaesthesia involving injection of a local anaesthetic into the cerebrospinal fluid (CSF), generally through a fine needle, usually 3.5 …   Wikipedia

  • Anesthesia — Not to be confused with Paresthesia. For other uses, see Anesthesia (disambiguation). Anesthesia, or anaesthesia (see spelling differences; from Greek αν , an , without ; and αἴσθησις, aisthēsis, sensation ), traditionally meant the condition of… …   Wikipedia

  • Local anesthesia — Intervention MeSH D000772 Local anesthesia is any technique to induce the absence of sensation in part of the body,[1] generally fo …   Wikipedia

  • Reference range — Reference ranges edit in: blood urine CSF feces In health related fields, a reference range or reference interval usually describes the variations of a measurement or value in healthy i …   Wikipedia

  • Medical monitor — as used in anesthesia A medical monitor or physiological monitor or display, is an electronic medical device used in medical monitoring that displays the monitored data, and may or may not have the ability to transmit the data on a monitoring… …   Wikipedia

  • Midazolam — Systematic (IUPAC) name 8 chloro 6 (2 fluorophenyl) 1 methyl 4H imidazo[1,5 …   Wikipedia

  • Malignant hyperthermia — Classification and external resources Abnormalities in the Ryanodine receptor 1 gene are commonly detected in malignant hyperthermia ICD 10 T …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”