Pediatric anesthesia & critical care

Second infant spinal anesthetic: Incidence, dose modification, and adverse events after initial failure

Paediatr AnaesthPublished Retrospective cohort study

Authors' conclusion

Infant spinal anesthesia is associated with high success rates if experienced anesthetists are present or performing the block. Repeat spinal anesthesia may be associated with an increased incidence of high spinal block.

Study context

Population
Infants (premature and ex-premature) receiving spinal anaesthesia, May 2016 to June 2023mean postmenstrual age 42.9 weeks
Participants
551 infants
Outcome
Overall spinal failure rate, incidence of second spinal attempts and adverse events with a second spinal anesthetic
Methodological detailssingle-centre, quaternary centre
  • Single-centre
  • Quaternary centre

Main finding

As reported in the abstract

Spinal anesthesia success and failure
Success on first attempt
86.5%
Successful second spinal after initial failure
5.1%
Failure requiring conversion to GA
9.4%
Repeat spinal performed after initial failure (cases)
28
Repeat spinal successful
92.8%
Awake caudal successful (after initial failure)
7.2%

Observational data: associations, not effects.

Further findings

OutcomeStylettedNon stylettedOR (95% CI)P value
Spinal failure by anesthetist performing <5 spinals per year2.21 (1.28–3.83)P = 0.004
Spinal failure by needle type21.4%9.2%2.68 (1.23–5.86)P = 0.012
  • Spinal failure by anesthetist performing <5 spinals per year: only weakly associated with years of pediatric anesthetic experience

Causes of failed spinal anesthetic

Dry tap
4.2%
Inadequate motor blockade
2.9%
Repeated bloody taps
2.2%

Safety

Perioperative apnoea

Overall incidence
6.7%
Failed spinal converted to GA (highest rate)
25%

High spinal blockade

Total cases
3
After a single spinal
1
After a repeat spinal (both required intubation and brief resuscitation)
2

Original publication

Second infant spinal anesthetic: Incidence, dose modification, and adverse events after initial failure. Paediatr Anaesth. Published 26 December 2023. doi:10.1111/pan.14831

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