Chloroprocaine

[3] Chloroprocaine was developed to meet the need for a short-acting spinal anaesthetic that is reliable and has a favourable safety profile to support the growing need for day-case surgery.

These data are based upon a retrospective review of 672 patients suitable for spinal anesthesia in surgical procedures less than 60 minutes' duration using 30–40 mg chloroprocaine.

The results showed good surgical anesthesia, a fast onset time, and postoperative mobilization after 90 minutes without complications.

[9] In the early 1980s, several cases were reported of neurological deficits after inadvertent intrathecal injections intended for epidural delivery.

Fetal pH is slightly lower than maternal (7.32 to 7.38), thus most unionized drugs are "ion trapped" to a degree, even in a healthy fetus.

Chloroprocaine (pKa 8.7) is the drug of choice for epidural analgesia and a decompensating fetus, because it does not participate in ion trapping.

Chloroprocaine synthesis: H.C. Marks, H.I. Rubin, U.S. patent 2,460,139 (1949 to Wallace & Tiernan Inc).