The Use of Autologous Amniotic Fluid at Cesarean Wound Closure

  • End date
    Mar 23, 2022
  • participants needed
  • sponsor
    Recibio, Inc.
Updated on 23 September 2021
cesarean section


The purpose of this study is to determine the feasibility of collecting amniotic fluid at delivery that will be immediately processed and then applied as a spray to the various layers of cesarean wound closure.


This is a single-site, prospective pilot study involving the collection of amniotic fluid at cesarean delivery followed by the immediate processing and re-application to the closure among twenty women at term undergoing cesarean delivery at Duke University Hospital. The objective of the study is to determine the feasibility of collection and application of autologous amniotic fluid at cesarean delivery.

VISIT 1: Screening/Enrollment Visit:

Once informed consent is obtained, demographic information, as well as medical and surgical history will be obtained. A medical release form will also be signed so that in the event that the subject is seen outside the Duke Health system after delivery, the study team will be able to request pertinent medical records.

VISIT 2: Day of Surgery Visit:

At presentation for delivery, study team members will reconfirm eligibility criteria. Subjects will then undergo cesarean delivery as per standard care.

The Recibio kit includes the following supplies, all of which are packaged in a sterile kit and will be opened onto the sterile surgical field:

  • Mucous trap
  • Yankauer suction device
  • Tubing to connect to wall suction
  • 10 ml syringe
  • 1 ml syringe
  • Syringe spray applicator and spray tip with attached syringes - the spray device is included in sterile packaging and manufactured and distributed by Recibio, Inc. Ratio Applicator Kit, Ref # 2101 with an have FDA clearance via Class 1 exempt device FDA listing number D377967.

10% calcium chloride vials will be provided separately. Vials will not be placed on the sterile field as it will likely not have sterile packaging. The calcium chloride solution will either be poured into a small sterile bowl so that it may be drawn up into the1 cc device syringe in a sterile manner OR drawn up into the device syringe directly by a member of the sterile surgical team while a member of the study team holds the non-sterile portion of the vial.

The sterile supplies will be placed on the surgical table and set up for use prior to the start of the cesarean section. The surgery will begin and be completed as part of standard of care.

Once the uterine incision has been made the following steps will be taken:

Following incision of the lower uterine segment, the amniotic sac will be opened with an amniotic perforator.

The Yankauer will be used to suction the amniotic fluid into the mucous trap as it escapes from the amniotic cavity.

After delivery of the newborn and placenta and the uterine incision closed, the amniotic fluid will be drawn from the mucous trap into the 10 ml syringe

The 10 mL syringe containing the amniotic fluid will then be observed for gross contamination (i.e. vertex, meconium-staining) and then attached to the spray device.

The 1 ml syringe containing 1 ml of 10% calcium chloride will then also be attached to the spray device via the second port (final concentration of 1% once sprayed).

The amniotic fluid-calcium chloride mixture will then be sprayed (1.5 to 2.0 ml) across the closed uterine incision and lower uterine segment.

Next the fascia will be closed and the fascial incision sprayed (1.5 to 2.0 ml).

Finally, the subcutaneous tissue will be closed and sprayed (1.5 to 2.0 ml) and then the skin will be closed and sprayed (1.5 to 2.0 ml).

A photo of the closed incision will be taken prior to the application of any bandages.

The incision will then be dressed as part of standard practice.

Any extra amniotic fluid will be kept and stored at -80 degrees in the Duke Reproductive Biology and Perinatal Research Laboratory for potential future research.

Since this study is testing product feasibility, only licensed investigators that are included as study personnel will be permitted to apply CeaLogic to the various tissue layers as described above.

Data elements regarding certain time points during surgery, use of the CeaLogic, and any complications will be recorded. These include, but are not limited to:

Procedure start time (incision time)

Time of uterine incision

Approximate volume of amniotic fluid collected

Description of amniotic fluid (color, presence/absence of vertex, blood, or meconium-staining)

Time that uterine closure is complete

Approximate spray volume to closed uterine incision

Approximate spray volume to closed abdominal fascia

Approximate spray volume to closed subcutaneous tissue

Approximate spray volume to closed skin

Procedure end time

Estimated blood loss

Type of skin closure

VISIT 3: Day of Discharge Visit:

The subject will receive routine post-operative care during the immediate post-operative period. Most cesarean section patients are discharged home on post-operative day 2 or 3. The following study activities will occur at this visit:

A photo of the incision site

Assessment of the incision site that includes presence of redness, swelling, induration, as well as pain at rest and with gentle pressure

The amount of pain medication used since delivery (non-steroidal anti-inflammatory agents and narcotics)

The patient will be provided with a memory aid to record pain level and any pain medications that she takes once she goes home.

An instruction form on how to complete the memory aid, as well as study team contact information, should the patient have questions or problems related to her incision.

Scheduling of the first follow up visit that will occur 6-8 days after surgery.

The study team will monitor the subject's medical record for vital signs and record any evidence of post-operative fever (maternal temperature greater than 38 degrees C its source, and action taken by the care team.

Documentation of any adverse events

VISIT 4: 1 Week Follow Up Visit:

Subjects will be seen at the Duke Perinatal Research Center approximately one week following her procedure (post-operative day 6-8).

At this visit the following study procedures will occur:

Photo of the wound

Assessment of the incision

Documentation of any signs or symptoms of infection

Review of the subject's memory aid for pain and pain medication

Documentation of any adverse events

Scheduling of the next study visit (approximately 4 weeks post-delivery)

VISIT 5: 4 Week Follow Up Visit:

Subjects will be seen during the routine postpartum clinic visit at approximately 4 weeks following delivery.

At this visit the following study procedures will occur:

Photo of the wound

Assessment of the incision

Documentation of any signs or symptoms of infection

Documentation of any adverse events

Review of the subject's memory aid for pain and pain medication

VISIT 6: Phone Call Follow Up Visit:

The subject will be contacted by telephone by a member of the study team approximately 6 weeks after delivery to determine if she had any wound complications since her last visit. If so, the subject's medical record will be reviewed to determine if there were any complications or treatment pertaining to her cesarean section incision. If the subject received this care outside of the Duke Health system, the signed medical records release will be sent to the applicable health care facility to request pertinent to be reviewed. An IRB-approved phone script will be used for this phone call. The subject will also be asked a series of questions pertaining to medication use, pain at the incision site, and activity level. Adverse events will be documented if they have occurred.

Unscheduled Study Visit:

If a study subject contacts the study team with concern for complications with her cesarean section wound, an unscheduled visit will be completed. This visit can happen anytime during the subject's participation(up to 30 days following the procedure where the procedure day is day 1), but after the CeaLogic has been applied.

During this visit, study staff will perform the following study procedures:

Photo of the wound

Assessment of the incision

Documentation of any signs or symptoms of infection

Documentation of adverse events

Review of medical record for any treatment actions taken related to the cesarean section wound

Product Use questionnaire:

In addition to the above study activities, each time a licensed investigator uses CeaLogic, they will be asked to complete a short questionnaire about their experience with using the device. No personal identifying information will be captured in this questionnaire. Information gathered from these questionnaires will be compiled and given to the sponsor for feedback and possible product improvements.

Condition Pregnancy Related, Cesarean Wound Disruption, Cesarean Section; Infection, Cesarean Section; Infection, Cesarean Section; Infection, Cesarean Section; Infection, Cesarean Section; Infection, Cesarean Section; Infection, Cesarean Section; Infection, Cesarean Section; Infection
Treatment Application of Autologous Amniotic Fluid
Clinical Study IdentifierNCT04359472
SponsorRecibio, Inc.
Last Modified on23 September 2021


Yes No Not Sure

Inclusion Criteria

Pregnant female age great than 18 years
Singleton gestation
Plan for cesarean delivery
Planned gestational age of at least weeks at the time of delivery
English speaking
Able to provide own informed consent
Intention of being available for entire study period and complete all relevant study procedures, including follow-up study visits and phone calls

Exclusion Criteria

Diabetes requiring therapy (type I or type II diabetes, gestational diabetes on medical therapy)
BMI greater than or equal to 40 kg/m2 at the time of enrollment
Placenta previa or placenta accreta
Prior bowel or urologic surgery (except un-ruptured appendectomy or uncomplicated cholecystectomy)
Multiple gestation
Previous history of postpartum hemorrhage requiring medical or surgical treatment
Known or suspected impairment of immunologic function including infection with HIV, hepatitis B or C
Known tobacco or drug use
Any condition which, in the opinion of the investigator, may pose a health risk to the subject or interfere with the evaluation of the study objectives
History of keloid formation
Exclusion criteria at time of surgery
Labor at time of presentation to labor and delivery (regular, painful uterine contractions occurring every 5 minutes with evidence of cervical change)
Chorioamnionitis or other systemic infection at time of presentation for cesarean section, including evidence of lower abdominal skin infection (i.e. yeast, etc)
Need for urgent Cesarean section (examples include, but not limited to: non-reassuring fetal status (category II or III tracing), placental abruption, severe preeclampsia or eclampsia)
Rupture of membranes prior to the start of the surgery
Meconium-stained or blood-stained amniotic fluid
Experiences intraoperative hemorrhage requiring transfusion, disseminated-intravascular coagulopathy (DIC), or other medical or surgical condition during the delivery deemed by the investigator to pose a prohibitively high risk for surgical re-exploration or wound complication
Who, in the investigator's opinion, would have any clinically significant condition that would impair the patient's ability to comply with the study procedures
Need for vertical skin incision
Intraoperative use of hemostatic agent (examples include FLOSEAL and AVIGUARD)
Plan for use of staples at closure of the skin incision
Preeclampsia with severe features
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