Immune and Physical Recovery Following Cesarean Delivery

Stanford University60 enrolled

Overview

Pregnancy results in an altered immune state compared to the nonpregnant population. A significant proportion of women undergoing cesarean delivery recover poorly. The first step to determining whether this is an immune driven / associated process is to characterise what effects this surgery has on maternal immune function. "Normal" changes will be evaluated in maternal immune function and activity precipitated by surgery and delivery of the neonate. Immune response to surgery will be compared to historical immune data from patients undergoing non-obstetric surgery (orthopaedic patients).

Variations will be evaluated in baseline and postpartum leukocyte subset distribution and singling pathways within leukocyte subsets (including response to surgery) in women undergoing elective cesarean delivery compare to patients undergoing nonobstetric surgery (orthopaedic data from a completed study). This will help to determine whether baseline immune function and response to trauma (surgery) is the same in the pregnant and non-pregnant states. Women will also be evaluated for clinical recovery parameters using validated scoring measures and objective measurement of physical activity through use of a smartwatch (actigraph) around the peripartum period. This information is of significant importance as it brings us one step closer to identifying immune mechanisms that may be involved in or associated with poorer postpartum recovery. Aim- to determine whether perioperative immune function can predict women who are likely to have delayed physical recovery or recover poorly as demonstrated by lower scores on subjective clinical questionnaires and collected via watch actigraphy. This will help to determine whether a pre-existing deficient immune state is responsible for a worse recovery profile, which could be identified preoperatively. Similarly whether an impairment in response to surgery is demonstrable, which predisposes women to worse recovery profiles will be evaluated. Ultimately, earlier identification of at-risk parturients (for example, through a preoperative bedside test) may lead to earlier interventions / patient centred care, in an attempt to improve their recovery trajectory and patient experience.

Study Type

OBSERVATIONAL

Enrollment

Conditions

Cesarean Delivery

Interventions

Elective cesarean deliveryPROCEDURE

scheduled cesarean delivery for maternal / obstetric indications

Eligibility

Sex: FEMALEMin age: 18 YearsMax age: 50 Years

Medical Language ↔ Plain English

Inclusion Criteria: * elective cesarean delivery at Lucile Packard Hospital * age \>20 to \<50 years old, * single pregnancy term * gestational age 37-41 weeks pregnancy, * elective cesarean delivery, * spinal or combined spinal-epidural anesthesia as primary anesthesia mode, * multimodal analgesia regimen (including intrathecal morphine and regular acetaminophen and NSAIDs), single center at Stanford. * ASA grade 1 or 2. * gestational diabetes (not requiring insulin or diabetes medications and pre-eclampsia (without severe features) will be included. * ethnic background: all ethnic backgrounds will be included gender: pregnant women only Exclusion Criteria: * refusal to participate

Locations (1)

Stanford University

Palo Alto, California, United States

Outcomes

Primary Outcomes

Incidence of immune changes from preoperative to day 1 postoperative

immune changes include: leukocyte subset distribution, intracellular signaling pathway activity within leukocyte subsets and cytokine-induced responses to ex-vivo stimulation in leukocyte subsets

Time frame: immediately prior to surgery versus morning following surgery (approximately 24 hrs apart)

change in activity (measured by actigraphy) before and after cesarean

Actigraph smartwatch data will be used to assess how activity changes around the time of delivery and determine physical recovery profiles following elective cesarean delivery. Time to baseline and time to plateau of maximal physical activity will be assessed in the postpartum period up to 6 weeks postoperatively.

Time frame: 2 weeks pre to 6 weeks postoperative

Secondary Outcomes

perioperative response to cytokine stimulation

cytokine stimulation of leucocytes from parturients will be assessed using mass cytometry. blood samples will be taken from all participants preoperatively and on morning following surgery. 10 women will also have: postanesthetic care unit blood, umbilical vein blood and day 2 blood samples taken

Time frame: preoperative, day 1 (and in a subset PACU, umbilical vein, and day 2)

ex-vivo leucocyte response

Leucocytes will be chemically stimulated ex-vivo for each leukocyte subset, plot stimulated and unstimulated levels and delta (change) in levels at each time point 10 women will also have: postanesthetic care unit blood, umbilical vein blood and day 2 blood samples taken

Time frame: preoperative, day 1 (and in a subset PACU, umbilical vein, and day 2)

immune predictors of delayed physical recovery

phenotype (immune profile) associated with delayed physical recovery. determine whether any preoperative immune phenotype (preoperative changes in immune response to chemical stressors) can predict worse activity profiles analysed using actigraph data.

Data from ClinicalTrials.gov

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