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SOGC CLINICAL PRACTICE GUIDELINE| Volume 42, ISSUE 3, P316-348.e9, March 2020

No. 396-Fetal Health Surveillance: Intrapartum Consensus Guideline

      Abstract

      Objective

      To present evidence and recommendations regarding use, classification, interpretation, response, and documentation of fetal surveillance in the intrapartum period and to provide information to help minimize the risk of birth asphyxia while maintaining the lowest possible rate of obstetrical intervention.

      Intended Users

      Members of intrapartum care teams, including but not limited to obstetricians, family physicians, midwives and nurses, and their learners

      Target Population

      Intrapartum women

      Options

      All methods of uterine activity assessment and fetal heart rate surveillance were considered in developing this document.

      Outcomes

      The impact, benefits, and risks of different methods of surveillance on the diverse maternal-fetal health conditions have been reviewed based on current evidence and expert opinion. No fetal surveillance method will provide 100% detection of fetal compromise; thus, all FHS methods are viewed as screening tests. As the evidence continues to evolve, caregivers from all disciplines are encouraged to attend evidence-based Canadian educational programs every 2 years.

      Evidence

      Literature published between January 1976 and February 2019 was reviewed. Medline, the Cochrane Database, and international guidelines were used to search the literature for all studies on intrapartum fetal surveillance.

      Validation Methods

      The principal and contributing authors agreed to the content and recommendations. The Board of the Society of Obstetricians and Gynaecologists of Canada approved the final draft for publication. The level of evidence has been determined using the criteria and classifications of the Canadian Task Force on Preventive Health Care.

      Benefits, Harm, and Costs

      Consistent interdisciplinary use of the guideline, appropriate equipment, and trained professional staff enhances safe intrapartum care. Women and their support person(s) should be informed of the benefits and harms of different methods of fetal health surveillance.

      RECOMMENDATIONS

      Communication
      • 1
        Definitions outlined in this guideline should be adapted into facility policies and fetal health surveillance educational programs for consistency and clarity of terminology and communication (II-3 A).
      • 2
        When communicating with colleagues and documenting fetal surveillance, fetal health surveillance terminology should be used to describe the uterine activity, fetal heart rate, and the classification (III-C).
      • 3
        Communication to the interprofessional team should be done clearly and efficiently (III-C).
      Support During Active Labour
      • 4
        Women in active labour should receive continuous close support from an appropriately trained person (I-A).
      • 5
        Fetal surveillance by intermittent auscultation or electronic fetal monitoring requires the presence a professional caregiver (nurse, midwife, and/or physician) with knowledge of fetal surveillance methods, response, and labour support strategies (I-A).
      • 6
        One-to-one care of the woman is recommended, recognizing that the caregivers are really caring for more than 1 patient: the woman and her unborn baby or babies (III-C).
      Principles of Intrapartum Fetal Surveillance
      • 7
        The classified intermittent auscultation and electronic fetal monitoring findings must be interpreted in the context of the overall clinical picture (I-A).
      Selecting the Method of Fetal Heart Rate Monitoring: Intermittent Auscultation or Electronic Fetal Monitoring
      • 8
        Intermittent auscultation, following an established protocol of surveillance and response, is the recommended method of intrapartum fetal surveillance for healthy women between 370 and 413 weeks gestation in spontaneous labour, in the absence of risk factors for adverse perinatal and neonatal outcomes (I-B).
      • 9
        Intermittent auscultation may be used for women who are 414 weeks gestation to 420 weeks, provided there is documentation of a normal non-stress test and normal amniotic fluid volume (III-C).
      • 10
        Electronic fetal monitoring is recommended for pregnancies at risk of adverse perinatal outcome (II-A).
      Paper Speed
      • 11
        Canadian health care facilities should move towards a universal paper speed of 3 cm/minute for electronic fetal monitoring tracings to facilitate national consistency of practice, education, and research (III-B).
      Admission Assessments
      • 12
        Admission intermittent auscultation assessments are recommended for healthy term women presenting in labour, early labour, or query labour in the absence of risk factors for adverse perinatal outcome (I-A).
      • 13
        Admission electronic fetal monitoring assessments are recommended for women with risk factors for adverse perinatal outcome (III-B).
      • 14
        When a woman begins labour following cervical ripening, the method of intrapartum fetal health surveillance monitoring should be determined by the ongoing maternal and fetal risk factors (III-C).
      Epidural Analgesia
      • 15
        Intermittent auscultation may continue to be used to monitor the fetus when epidural analgesia is initiated and used during labour in low-risk, term pregnancies in spontaneous labour provided that a protocol is in place for frequent intermittent auscultation assessment (III-C).
      • 16
        Electronic fetal monitoring is recommended for combined spinal–epidural analgesia (CSE) because CSE is associated with a higher risk of an atypical or abnormal fetal heart pattern than with the use of epidural alone (1-B).
      Intermittent Auscultation in Labour
      • 17
        After establishing the baseline fetal heart rate, fetal heart rate assessments should be conducted by listening and counting immediately after the contraction for 30–60 seconds to ensure that the fetal heart rate is consistent with the established fetal baseline rate and to detect accelerations or decelerations from baseline (II-3 B).
      • 18
        When using intermittent auscultation, if a deceleration is heard or suspected immediately following a contraction, further assessment is required by changing position and listening again or by initiating EFM. If decelerations are confirmed by the further IA, EFM is indicated. Intrauterine resuscitation should be initiated as required (III-C).
      • 19
        When electronic fetal monitoring is initiated in response to abnormal intermittent auscultation, it may be removed when no maternal fetal risk factors are identified based on a review of the overall clinical picture and a normal tracing is observed; a minimum of 20 minutes of electronic fetal monitoring tracing is suggested (III-C).
      Electronic Fetal Monitoring in Labour
      • 20
        When a normal tracing is identified during first stage of labour, it may be appropriate to interrupt the electronic fetal monitoring tracing for up to 30 minutes to facilitate periods of ambulation, hydrotherapy, or position change, providing that (1) the maternal-fetal condition is stable and (2) if oxytocin is being administered, the infusion rate is stable (III-B).
      • 21
        Electronic fetal monitoring is best interpreted with a continuous tracing of the uterine activity and fetal heart rate. If a continuous tracing is not possible, or there is uncertainty of interpretation due to the quality of the tracing, use of an intrauterine pressure catheter and/or fetal spiral electrode could be considered, if available (III-B).
      Classification of Intrapartum Fetal Surveillance
      • 22
        The terms normal and abnormal are used to classify intermittent auscultation (III-C).
      • 23
        The presence of uterine tachysystole during IA classifies intermittent auscultation fetal health surveillance assessment as abnormal, and electronic fetal monitoring should be initiated (III-C).
      • 24
        The terms normal, atypical, and abnormal are used to classify electronic fetal monitoring (III-C).
      Maternal Heart Rate
      • 25
        Assess and document the maternal heart rate concurrently with the fetal heart rate, when using either IA or EFM, to differentiate maternal from fetal heart rate:
        • a
          At initial assessment when determining baseline fetal heart rate
        • b
          At any time when there is uncertainty between the maternal heart rate and fetal heart rate
        • c
          Based on the stage of labour:
          • i
            In the active first stage and passive second stage of labour: every 4 hours with intact membranes
          • ii
            In the active first stage and passive second stage of labour: every 2 hours with ruptured membranes
          • iii
            In the active second stage of labour: every 15–30 minutes (III-C)
      Fetal Health Surveillance Assessment in the Active Second Stage of Labour
      • 26
        Intermittent auscultation is recommended if the woman continues to meet the criteria for intermittent auscultation assessments (IB).
      • 27
        Electronic fetal monitoring should be used for pregnancies at risk of adverse perinatal outcomes (IIA).
      Intrauterine Resuscitation
      • 28
        Maternal vital signs should be obtained as part of intrauterine resuscitation (III-C).
      • 29
        Maternal oxygen should be administered for confirmed maternal hypoxia or hypovolemia, and NOT routinely used as a resuscitative measure for atypical or abnormal fetal heart tracings (1-A).
      • 30
        An intravenous bolus should be used only in the event of maternal hypovolemia and/or hypotension (III-C).
      Digital Fetal Scalp Stimulation
      • 31
        Digital fetal scalp stimulation is recommended as an indirect assessment of acid-base status in response to atypical or abnormal electronic fetal monitoring tracings (II-B).
      • 32
        The absence of an acceleration with digital fetal scalp stimulation does not necessarily indicate fetal compromise. When acceleration does not occur:
      • Fetal scalp blood sampling should be considered when available (II-B).
      • If fetal scalp blood sampling is not possible, consider ongoing vigilant evaluation of the fetal health surveillance tracing if other elements of the fetal health surveillance and the clinical situation are normal or prompt delivery depending on the overall clinical situation (III-C).
      Fetal Scalp Blood Sampling
      • 33
        Where facilities and expertise exist, fetal scalp blood sampling for assessment of fetal acid-base status (using lactate or pH) is recommended in women at gestations >34 weeks when delivery is not imminent and when
        • a
          atypical/abnormal electronic fetal monitoring tracings are identified and not resolved with intrauterine resuscitation measures (III-C);
        • b
          digital fetal scalp stimulation does not result in an acceleratory fetal heart rate response (III-C).
      • 34
        Fetal scalp lactate blood sampling is a reliable tool to assess intrapartum fetal acidosis and may be used when clinically indicated, available, and with resources to respond (I-A).
      Umbilical Cord Blood Gases
      • 35
        Cord blood sampling of both umbilical arterial and umbilical venous blood is recommended for ALL births (III-C).
      Documentation
      • 36
        Fetal health surveillance terminology should be used to describe the uterine activity, fetal heart rate and the classification in documentation (III-A).
      • 37
        Classification should be included whenever fetal health surveillance is documented (III-A).
      • 38
        Recommended criteria for frequency of assessment, classification, and documentation vary based on the stage of labour, maternal fetal status, and method of fetal surveillance (III-B).
      Fetal Surveillance Technology Not Recommended
      • 39
        Fetal pulse oximetry, with or without electronic fetal surveillance, is not recommended (III-C).
      • 40
        ST waveform analysis for the intrapartum assessment of the compromised fetus is not recommended (I-A).
      • 41
        Computer-based interpretation of electronic fetal monitoring tracing is not recommended (I-D).
      Fetal Health Surveillance Education
      • 42
        All providers of intrapartum obstetrical care (physicians, nurses, midwives) should be required to commit to formal education in fetal health surveillance and maintain up-to-date competence with formal education review of both intermittent auscultation and electronic fetal monitoring every 2 years (II-B).
      • 43
        Each facility should provide opportunities for all intrapartum care providers (physicians, nurses, midwives) to regularly attend an interdisciplinary educational discussion of fetal health surveillance clinical situations, including both intermittent auscultation and electronic fetal monitoring, to ensure common terminology and shared understanding and to foster the concept of team responsibility (III-C).

      Key Words

      Abbreviations:

      BD (Base deficit), BMI (Body mass index), bpm (Beats per minute), CP (Cerebral palsy), CD (Cesarean delivery), CTG (Cardiotocography), EFM (Electronic fetal monitoring), FHR (Fetal heart rate), FHS (Fetal health surveillance (UA and FHR)), FSBS (Fetal scalp blood sampling), FSE (Fetal spiral electrode), HIE (Hypoxic-ischemic encephalopathy), IA (Intermittent auscultation), IUPC (Intrauterine pressure catheter), MHR (Maternal heart rate), MVU (Montevideo units), toco (Tocodynamometer), TOLAC (Trial of labour after CD), UA (Uterine activity)
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      REFERENCES

        • Royal Australian and New Zealand College of Obstetricians and Gynaecologists
        Intrapartum Fetal Surveillance Clinical Guideline – Third Edition 2014.
        Royal Australian and New Zealand College of Obstetricians and Gynaecologists, East Melbourne, Australia2014
        • Mann S
        • Pratt SD.
        Team approach to care in labor and delivery.
        Clin Obstet Gynecol. 2008; 51: 666-679
        • Zwarenstein M
        • Bryant W.
        Interventions to promote collaboration between nurses and doctors.
        Cochrane Database Syst Rev. 2000; 2CD000072
      1. The Joint Commission. Sentinel Event Data Root Causes by Event Type 2004-2013. 2014.

        • Healthcare Insurance Reciprocal of Canada (HIROC), Canadian Medical Protective Association (CMPA)
        Delivery in Focus: Strengthening Obstetrical Care in Canada: 10-Year Review of CMPA and HIROC Data.
        HIROC and CMPA, Ottawa2018 (Available at:)
        • Royal College of Obstetricians and Gynaecologists
        Each baby counts: 2018 progress report.
        Royal College of Obstetricians and Gynaecologists, London2015
      2. Canadian Medical Protection Agency. Good Practices Guide: Safe care — reducing medical-legal risk. Available at: https://www.cmpa-acpm.ca/serve/docs/ela/goodpracticesguide/pages/index/index-e.html. Accessed on June 3, 2019.

        • Association of Women's Health, Obstetric and Neonatal Nurses
        Fetal heart monitoring: principles and practices.
        3rd ed. Association of Women's Health, Obstetric and Neonatal Nurses, Washington, DC2003
        • American College of Obstetricians and Gynecologists
        Informed consent. Ethics in obstetrics and gynecology.
        2nd ed. American College of Obstetricians and Gynecologists, Washington, DC2004: 9-17
        • Bohren MA
        • Hofmeyr GJ
        • Sakala C
        • et al.
        Continuous support for women during childbirth.
        Cochrane Database Syst Rev. 2017; 7CD003766
      3. Fetal heart monitoring.
        J Obstet Gynecol Neonatal Nurs. 2015; 44: 683-686
        • National Institute for Health and Care Excellence
        Addendum to intrapartum care: care of healthy women and their babies during childbirth. Clinical guideline 190.1.
        National Institute for Health and Care Excellence, London2016
        • Alfirevic Z
        • Devane D
        • Gyte GM
        • et al.
        Continuous cardiotocography (CTG) as a form of electronic fetal monitoring (EFM) for fetal assessment during labour.
        Cochrane Database Syst Rev. 2017; 2CD006066
        • Nelson KB
        • Sartwelle TP
        • Rouse DJ
        Electronic fetal monitoring, cerebral palsy, and caesarean section: assumptions versus evidence.
        BMJ. 2016; 355: i6405
        • Vintzileos AM
        • Nochimson DJ
        • Guzman ER
        • et al.
        Intrapartum electronic fetal heart rate monitoring versus intermittent auscultation: a meta-analysis.
        Obstet Gynecol. 1995; 85: 149-155
        • Guidetti DA
        • Divon MY
        • Langer O
        Postdate fetal surveillance: is 41 weeks too early?.
        Am J Obstet Gynecol. 1989; 161: 91-93
        • Bochner CJ
        • Williams 3rd, J
        • Castro L
        • et al.
        The efficacy of starting postterm antenatal testing at 41 weeks as compared with 42 weeks of gestational age.
        Am J Obstet Gynecol. 1988; 159: 550-554
        • Clement D
        • Schifrin BS
        • Kates RB
        Acute oligohydramnios in postdate pregnancy.
        Am J Obstet Gynecol. 1987; 157: 884-886
        • Smith KA
        • Bryce S.
        Trauma in the pregnant patient: an evidence-based approach to management.
        Emerg Med Pract. 2013; 15 (quiz 19): 1-18
        • Jain V
        • Chari R
        • Maslovitz S
        • et al.
        Guidelines for the management of a pregnant trauma patient.
        J Obstet Gynaecol Can. 2015; 37: 553-574
        • Davies GAL
        • Maxwell C
        • McLeod L
        No. 239-obesity in pregnancy.
        J Obstet Gynaecol Can. 2018; 40: e630-e639
        • Ashwal E
        • Melamed N
        • Hiersch L
        • et al.
        The impact of isolated single umbilical artery on labor and delivery outcome.
        Prenat Diagn. 2014; 34: 581-585
        • Kim HJ
        • Kim JH
        • Chay DB
        • et al.
        Association of isolated single umbilical artery with perinatal outcomes: systemic review and meta-analysis.
        Obstet Gynecol Sci. 2017; 60: 266-273
        • Luo QQ
        • Zou L
        • Gao H
        • et al.
        Idiopathic polyhydramnios at term and pregnancy outcomes: a multicenter observational study.
        J Matern Fetal Neonatal Med. 2017; 30: 1755-1759
        • Sweha A
        • Hacker TW
        • Nuovo J
        Interpretation of the electronic fetal heart rate during labor.
        Am Fam Physician. 1999; 59: 2487-2500
        • Sinkin JA
        • Craig WY
        • Jones M
        • et al.
        Perinatal outcomes associated with isolated velamentous cord insertion in singleton and twin pregnancies.
        J Ultrasound Med. 2018; 37: 471-478
        • Kong CW
        • Chan LW
        • To WW
        Neonatal outcome and mode of delivery in the presence of nuchal cord loops: implications on patient counselling and the mode of delivery.
        Arch Gynecol Obstet. 2015; 292: 283-289
        • Desseauve D
        • Bonifazi-Grenouilleau M
        • Fritel X
        • et al.
        Fetal heart rate abnormalities associated with uterine rupture: a case-control study: a new time-lapse approach using a standardized classification.
        Eur J Obstet Gynecol Reprod Biol. 2016; 197: 16-21
        • Hattler J
        • Klimek M
        • Rossaint R
        • et al.
        The effect of combined spinal-epidural versus epidural analgesia in laboring women on nonreassuring fetal heart rate tracings: systematic review and meta-analysis.
        Anesth Analg. 2016; 123: 955-964
        • German Society of Gynecology and Obstetrics, Maternal Fetal Medicine Study Group, German Society of Prenatal Medicine and Obstetrics
        S1-guideline on the use of CTG during pregnancy and labor: long version - AWMF registry no. 015/036.
        Geburtshilfe Frauenheilkd. 2014; 74: 721-732
        • Toivonen E
        • Palomaki O
        • Huhtala H
        • et al.
        Cardiotocography in breech versus vertex delivery: an examiner-blinded, cross-sectional nested case-control study.
        BMC Pregnancy Childbirth. 2016; 16: 319
      4. Kiely DJ, Oppenheimer LW, Dornan JC. Cardiotocography-associated fetal and neonatal deaths reported to the US FDA 2009–2019. 2019: Dataset Project. Available at: https://figshare.com/projects/Cardiotocography-associated_fetal_and_neonatal_deaths_reported_to_the_US_FDA_2009-2019/67928. Accessed October 14, 2019.

        • Freeman RK
        • Garite TJ
        • Nageotte MP
        • et al.
        Fetal heart rate monitoring.
        4th ed. Lippincott Williams & Wilkins, Philadelphia, PA2012
        • Miller DA
        • et al.
        Intrapartum fetal evaluation.
        in: Gabbe SG Niebyl JR Simpson JL Obstetrics: normal and problem pregnancies. 7th ed. Elsevier, Philadelphia, PA2017
        • Paquette S
        • Moretti F
        • O'Reilly K
        • et al.
        The incidence of maternal artefact during intrapartum fetal heart rate monitoring.
        J Obstet Gynaecol Can. 2014; 36: 962-968
        • Peleg D
        • Ram R
        • Warsof SL
        • et al.
        The effect of chart speed on fetal monitor interpretation.
        J Matern Fetal Neonatal Med. 2016; 29: 1577-1580
        • Devane D
        • Lalor JG
        • Daly S
        • et al.
        Cardiotocography versus intermittent auscultation of fetal heart on admission to labour ward for assessment of fetal wellbeing.
        Cochrane Database Syst Rev. 2017; 1CD005122
        • Smith V
        • Begley C
        • Newell J
        • et al.
        Admission cardiotocography versus intermittent auscultation of the fetal heart in low-risk pregnancy during evaluation for possible labour admission - a multicentre randomised trial: the ADCAR trial.
        BJOG. 2019; 126: 114-121
        • Lindqvist PG
        • Biasoletto G.
        Re: Admission cardiotocography versus intermittent auscultation of the fetal heart in low-risk pregnancy during evaluation for possible labour admission-a multicentre randomised trial: the ADCAR trial: Is admission cardiotocography effective? The result of a randomized controlled trial.
        BJOG. 2019; 126: 428-429
        • Vricella LK
        • Louis JM
        • Mercer BM
        • et al.
        Impact of morbid obesity on epidural anesthesia complications in labor.
        Am J Obstet Gynecol. 2011; 205 (e1–6): 370
        • Capogna G.
        Effect of epidural analgesia on the fetal heart rate.
        Eur J Obstet Gynecol Reprod Biol. 2001; 98: 160-164
        • National Institute for Health and Care Excellence
        Inducing Labour, Clinical guideline 70.
        National Institute for Health and Care Excellence, London2008 (Available at:)
        https://www.nice.org.uk/guidance/cg70
        Date accessed: June 3, 2019
        • Leduc D
        • Biringer A
        • Lee L
        • et al.
        Induction of labour.
        J Obstet Gynaecol Can. 2013; 35: 840-857
        • Jozwiak M
        • Bloemenkamp KW
        • Kelly AJ
        • et al.
        Mechanical methods for induction of labour.
        Cochrane Database Syst Rev. 2012; 3CD001233
        • Royal College of Obstetricians and Gynaecologists
        Birth After Previous Caesarean Birth, Green-top Guideline No. 45.
        Royal College of Obstetricians and Gynaecologists, London2015 (Available at:)
      5. Practice bulletin no. 184: vaginal birth after cesarean delivery.
        Obstet Gynecol. 2017; 130: e217-e233
        • Macones GA
        • Hankins GD
        • Spong CY
        • et al.
        The 2008 National Institute of Child Health and Human Development workshop report on electronic fetal monitoring: update on definitions, interpretation, and research guidelines.
        J Obstet Gynecol Neonatal Nurs. 2008; 37: 510-515
        • Canadian Perinatal Programs Coalition
        Fundamentals of fetal health surveillance: a self-learning manual.
        4th ed. NS: Canadian Perinatal Programs Coalition, Halifax, NS2009
      6. Antepartal and intrapartal fetal monitoring. In Murray ML (ed). Learning resources international, 2nd ed. Alburquerque, NM: Springer Publishing Company; 1997.

      7. Chandraharan E, Evans S, Frueger D, editors. Physiological CTG Interpretation: Intrapartum Fetal Monitoring Guideline. 2018. Available at:https://physiological-ctg.com/guideline/Intrapartum%20Fetal%20Monitoring%20Guideline.pdf. Accessed on June 3, 2019.

        • Woods JR
        • Flynn K
        • Glantz JC
        • Pittinaro D
        Case #680: Fetal Heart Rate Monitoring in 2006.
        PeriFACTS, 2006
        • Nensi A
        • De Silva DA
        • von Dadelszen P
        • et al.
        Effect of magnesium sulphate on fetal heart rate parameters: a systematic review.
        J Obstet Gynaecol Can. 2014; 36: 1055-1064
        • Afors K
        • Chandraharan E.
        Use of continuous electronic fetal monitoring in a preterm fetus: clinical dilemmas and recommendations for practice.
        J Pregnancy. 2011; 2011848794
        • Holzmann M
        • Wretler S
        • Nordstrom L
        Absence of accelerations during labor is of little value in interpreting fetal heart rate patterns.
        Acta Obstet Gynecol Scand. 2016; 95: 1097-1103
        • Skupski DW
        • Rosenberg CR
        • Eglinton GS
        Intrapartum fetal stimulation tests: a meta-analysis.
        Obstet Gynecol. 2002; 99: 129-134
        • Cahill AG
        • Tuuli MG
        • Stout MJ
        • et al.
        A prospective cohort study of fetal heart rate monitoring: deceleration area is predictive of fetal acidemia.
        Am J Obstet Gynecol. 2018; 218 (e1–12): 523
        • Hamilton E
        • Warrick P
        • O'Keeffe D
        Variable decelerations: do size and shape matter?.
        J Matern Fetal Neonatal Med. 2012; 25: 648-653
        • Jorgensen JS
        • Weber T.
        Fetal scalp blood sampling in labor–a review.
        Acta Obstet Gynecol Scand. 2014; 93: 548-555
        • Silberstein T
        • Sheiner E
        • Salem SY
        • et al.
        Fetal heart rate monitoring category 3 during the 2nd stage of labor is an independent predictor of fetal acidosis.
        J Matern Fetal Neonatal Med. 2017; 30: 257-260
        • Clark SL
        • Meyers JA
        • Frye DK
        • et al.
        Recognition and response to electronic fetal heart rate patterns: impact on newborn outcomes and primary cesarean delivery rate in women undergoing induction of labor.
        Am J Obstet Gynecol. 2015; 212 (e1–6): 494
        • Mercier FJ
        • Dounas M
        • Bouaziz H
        • et al.
        Intravenous nitroglycerin to relieve intrapartum fetal distress related to uterine hyperactivity: a prospective observational study.
        Anesth Analg. 1997; 84: 1117-1120
      8. Roque H, Gillen-Goldstein J, Funai EF. Amnionfusion: technique. Up to Date. 2012.

        • Damos JR
        • Deutchman ME
        • Ratcliffe SD
        Intrapartum procedures.
        in: Ratcliffe SD Byrd JE Sakornbut EL Handbook of pregnancy and perinatal care in family practice: science and practice. Hanley & Belfus, Philadelphia, PA1996: 360-390
        • Hamel MS
        • Anderson BL
        • Rouse DJ
        Oxygen for intrauterine resuscitation: of unproved benefit and potentially harmful.
        Am J Obstet Gynecol. 2014; 211: 124-127
      9. Intrapartum Fetal Heart Rate Monitoring. perinatology.com. Available at:http://www.perinatology.com/Fetal%20Monitoring/Intrapartum%20Monitoring.htm. Accessed on June 3, 2019.

        • Freeman RK
        • Garite TJ
        • Nageotte MP
        Fetal heart monitoring.
        3rd ed. Lippincott Williams & Wilkins, Philadelphia, PA2003
        • Elimian A
        • Figueroa R
        • Tejani N
        Intrapartum assessment of fetal well-being: a comparison of scalp stimulation with scalp blood pH sampling.
        Obstet Gynecol. 1997; 89: 373-376
        • Clark SL
        • Gimovsky ML
        • Miller FC
        The scalp stimulation test: a clinical alternative to fetal scalp blood sampling.
        Am J Obstet Gynecol. 1984; 148: 274-277
        • Young C
        • Ryce A.
        CADTH rapid response reports. fetal scalp lactate testing during intrapartum pregnancy with abnormal fetal heart rate: a review of clinical effectiveness, cost-effectiveness, and guidelines.
        Canadian Agency for Drugs and Technologies in Health, Ottawa2018
        • East CE
        • Leader LR
        • Sheehan P
        • et al.
        Intrapartum fetal scalp lactate sampling for fetal assessment in the presence of a non-reassuring fetal heart rate trace.
        Cochrane Database Syst Rev. 2015; 5CD006174
        • Wiberg-Itzel E
        • Lipponer C
        • Norman M
        • et al.
        Determination of pH or lactate in fetal scalp blood in management of intrapartum fetal distress: randomised controlled multicentre trial.
        BMJ. 2008; 336: 1284-1287
        • Wang M
        • Chua SC
        • Bouhadir L
        • et al.
        Point-of-care measurement of fetal blood lactate - time to trust a new device.
        Aust N Z J Obstet Gynaecol. 2018; 58: 72-78
        • Lewis D
        • Downe S
        • FIGO Intrapartum Fetal Monitoring Expert Consensus Panel
        FIGO consensus guidelines on intrapartum fetal monitoring: intermittent auscultation.
        Int J Gynaecol Obstet. 2015; 131: 9-12
        • Rorbye C
        • Perslev A
        • Nickelsen C
        Lactate versus pH levels in fetal scalp blood during labor–using the Lactate Scout System.
        J Matern Fetal Neonatal Med. 2016; 29: 1200-1204
        • Westgate J
        • Garibaldi JM
        • Greene KR
        Umbilical cord blood gas analysis at delivery: a time for quality data.
        Br J Obstet Gynaecol. 1994; 101: 1054-1063
        • Lievaart M
        • de Jong PA
        Acid-base equilibrium in umbilical cord blood and time of cord clamping.
        Obstet Gynecol. 1984; 63: 44-47
        • Manor M
        • Blickstein I
        • Hazan Y
        • et al.
        Postpartum determination of umbilical artery blood gases: effect of time and temperature.
        Clin Chem. 1998; 44: 681-683
        • Duerbeck NB
        • Chaffin DG
        • Seeds JW
        A practical approach to umbilical artery pH and blood gas determinations.
        Obstet Gynecol. 1992; 79: 959-962
        • Armstrong L
        • Stenson B.
        Effect of delayed sampling on umbilical cord arterial and venous lactate and blood gases in clamped and unclamped vessels.
        Arch Dis Child Fetal Neonatal Ed. 2006; 91: F342-F345
        • Philip AGS
        • Saigal S.
        When should we clamp the umbilical cord?.
        Neoreviews. 2004; 5: e142
        • Sabol BA
        • Caughey AB.
        Acidemia in neonates with a 5-minute Apgar score of 7 or greater - what are the outcomes?.
        Am J Obstet Gynecol. 2016; 215 (e1–6): 486
        • King T
        • Parer J.
        The physiology of fetal heart rate patterns and perinatal asphyxia.
        J Perinat Neonatal Nurs. 2000; 14 (quiz 102–3): 19-39
      10. HIROC. Strategies for Improving Documentation A Guide for Healthcare Providers and Administrators. Totonto ON: 2017.

        • East CE
        • Begg L
        • Colditz PB
        • et al.
        Fetal pulse oximetry for fetal assessment in labour.
        Cochrane Database Syst Rev. 2014; 10CD004075
        • Neilson JP
        Fetal electrocardiogram (ECG) for fetal monitoring during labour.
        Cochrane Database Syst Rev. 2015; 12CD000116
        • Blix E
        • Brurberg KG
        • Reierth E
        • et al.
        ST waveform analysis versus cardiotocography alone for intrapartum fetal monitoring: a systematic review and meta-analysis of randomized trials.
        Acta Obstet Gynecol Scand. 2016; 95: 16-27
        • Saccone G
        • Schuit E
        • Amer-Wahlin I
        • et al.
        Electrocardiogram ST analysis during labor: a systematic review and meta-analysis of randomized controlled trials.
        Obstet Gynecol. 2016; 127: 127-135
        • INFANT Collaborative Group
        Computerised interpretation of fetal heart rate during labour (INFANT): a randomised controlled trial.
        Lancet. 2017; 389: 1719-1729
        • Campanile M
        • D'Alessandro P
        • Della Corte L
        • et al.
        Intrapartum cardiotocography with and without computer analysis: a systematic review and meta-analysis of randomized controlled trials.
        J Matern Fetal Neonatal Med. 2018; : 1-7
        • Pehrson C
        • Sorensen JL
        • Amer-Wahlin I
        Evaluation and impact of cardiotocography training programmes: a systematic review.
        BJOG. 2011; 118: 926-935
        • Brown LD
        • Permezel M
        • Holberton JR
        • et al.
        Neonatal outcomes afterintroduction of a national intrapartum fetal surveillance education program: a retrospective cohort study.
        J Matern Fetal Neonatal Med. 2017; 30: 1777-1781

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