Reflex regulation and the functional assessment possibility of the cardiorespiratory system in pregnancy: a systematic review

INTRODUCTION: Anesthesia planning for cesarean section requires knowledge of physiological and functional features a pregnant patient has in her gestational age. Proper reduced the perioperative critical incidents risk. OBJECTIVE: Search data on methods results assessing cardiorespiratory status women using that involve such key mechanisms arterial baroreflex (ABR) peripheral chemoreflex (PCR) mechanisms. MATERIAL AND METHODS: We performed systematic review literature accordance with PRISMA guidelines. The bibliographic search was December 2022 Medline (Pubmed), RSCI (eLibrary.ru) Cochrane Library databases. keywords were: “pregnancy breath holding test”, chemoreflex”, baroreflex”, “Valsalva test pregnancy”. RESULTS: 110 documents were found, after deleting 68 papers various reasons 42 full-text sources analyzed, including detailed comparative analysis 8 met totally inclusion criteria. design, objectives, methods, availability, outcomes studies heterogeneous, so meta-analysis not performed. Were extracted summarized changes work system during pregnancy sensitivity chemoreflex. CONCLUSIONS: PCR can be assessed by inhalation hyperoxic, hypercapnic isooxic-hypercapnic gas mixtures (rebreathing test). ABR phenylephrine test, Valsalva orthostatic spectral sequences blood pressure values R-R interval. full-term increases. progressively decreases from beginning to end second trimester increases postpartum period initial level; third pregnancy, are individual do have single trend.