The effect of posture and baricity
on the spread of intrathecal bupivacaine for elective caesarean delivery.
DH Lambert and BGM Caovino (1987) studied the effect of baricity
of local anaesthetic solution on the level of anaesthesia.
of local anesthetic has an important role on spinal blockade effects.
1,15) Several studies have been undertaken in the past to evaluate the clinical efficacy and toxicology of these local anaesthetics in different dosage and baricity
Thirdly, different baricity
of intrathecal solution of ropivacaine may be another factor.
a strict unilateral block was achieved by manipulating different factors influencing the spread of anaesthetic agent such as local anaesthetic baricity
, patient's position during and after injection, anaesthetic dose and injection site.
The majority of previous work did not show any effect of baricity
on the drug spread within the cerebrospinal fluid in the obstetric population.
EVE, intrathecal drug baricity
and patient position
Factors affecting the spread of the local anaesthetic solution Factor Mechanism Baricity
of the local Blocks can be better controlled with anaesthetic solution hyperbaric solutions Position of the Level of the block may change if the patient patient's position is altered Concentration of and A higher concentration produces a denser volume injected block; a larger volume produces a block over a larger area Speed of injection Rapid injection produces eddy currents within the CSF and a less predictable spread Increased abdominal Leads to engorgement of the epidural pressure veins and reduction in CSF volume
However addition of fentanyl can change the baricity
of the local anaesthetic and can alter the effect of intended unilateral spinal analgesia.
Alterations in the baricity
of a solution to the extent of 0.
Besides, by using both the isobaric solution, the bias of baricity
was eliminated in our study.