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Bladder function in spinal anaesthesia.

K Axelsson, K Möllefors, J O Olsson

    Acta Anaesthesiologica Scandinavica
    |April 1, 1985
    PubMed
    Summary
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    Spinal anesthesia with bupivacaine or tetracaine rapidly blocks the micturition reflex. Bladder function recovery takes 7-8 hours, with motor function returning sooner than detrusor strength.

    Area of Science:

    • Anesthesiology
    • Urology

    Background:

    • Spinal anesthesia is commonly used for surgical procedures.
    • Understanding its effects on bladder function is crucial for patient care.

    Purpose of the Study:

    • To compare the effects of bupivacaine and tetracaine spinal anesthesia on urodynamic parameters.
    • To evaluate the recovery of bladder function and motor strength after spinal anesthesia.

    Main Methods:

    • 21 patients received spinal anesthesia with bupivacaine or tetracaine.
    • Urodynamic studies (CO2 cystometry) assessed bladder filling, capacity, and detrusor contraction.
    • Motor block was quantified for hip flexion, knee extension, and toe plantar flexion.

    Main Results:

    • Spinal anesthesia rapidly blocked the micturition reflex, with bladder paralysis observed within 5 minutes.

    Related Experiment Videos

  • Complete recovery of detrusor strength took 7-8 hours and did not significantly differ between anesthetic agents.
  • Motor strength in lower limbs recovered 40-140 minutes before detrusor strength.
  • Urethral pressure decreased by 48% and normalized around the time of detrusor recovery.

    • Conclusions:

    • Spinal anesthesia significantly impacts bladder function, causing temporary paralysis.
    • Recovery of bladder control is prolonged compared to motor function recovery.
    • Bupivacaine and tetracaine show similar effects on bladder function recovery time.