Clinical Procedure
 
Aliases:
Intrathecal anaesthesia (Adult)
Spinal Anaesthesia (Adult)
Intrathecal Anesthesia (Adult)

Topic aliases are alternate phrasings for a particular topic.


"With [intrathecal] morphine 0.05 to 0.5mg, the NNH for respiratory depression varied between 26 and 30 depending on the definition of respiratory depression chosen." Review paper 2011 refl.in/na

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A subdural injection resulting in a patchy block may occur if the spinal needle is not sufficiently through the dura and arachnoid mater.

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Consider the elevated risk of spinal haematoma if the patient has reduced platelet function. (eg renal failure, antiplatelet agents, thrombocytopaenia)

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Contraindicated in anticoagulated patients ( Warfarin, Coumadin, therapeutic clexane)

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Inadequate dose may be delivered if the spinal needle is not sufficiently through the dura.

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Only morphine preparations free of sodium metabisulfite should be used in the intrathecal space.
www.tga.gov.au/hp/informa...

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Long acting antiplatelet ADP inhibitors (clopidogrel) should be withheld 7-10 days prior to performing a neuraxial block. ASRA Guidelines 3rd Edition refl.in/bv

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Comparison of different spinal needle types.

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Quinke needle (cutting) refl.in/9d

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Sprotte pencil point needle refl.in/9d

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Whitacre pencil point needle refl.in/9d

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Dose for prolonged knee surgery eg total knee replacement.

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May 18, 2011
2.5-3.5ml 0.5% bupivicaine plus 15mcg Fentanyl #ref
Dose for cesarian section

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May 18, 2011
1.8-2.5ml 0.5% heavy bupivicaine with 15mcg fentanil #ref
Only co-loading with intravenous fluids has been shown to reduce hypotension due to neuraxial block, not preloading.

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Dec 31, 2011
Good summary of evidence here. refl.in/1j p43
Systematic review of all trials with randomisation to intraoperative neuraxial blockade or not. (?what are the patient groups?). Neuraxial blockade reduces postoperative mortality and other serious complications compared with general anaesthesia. Review article, BMJ 321 : 1493. 2000 refl.in/88

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