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Supine Hypotensive SyndromeNCT05654324

The Effect of Pelvic Floor Muscle Exercises on the Inferior Vena Cava

A study testing pelvic floor muscle exercises in people with Supine Hypotensive Syndrome, run by Izmir University of Economics at 1 site in Turkey (Türkiye).

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

The aim of this study is to examine the effect of pelvic floor muscle exercises on the hemodynamic responses of the vena cava inferior in pregnant and non-pregnant women. Read more about this study

Who is it for?
Ages 18 to 40 years, women onlyHealthy volunteers can take part
Conditions the study is for
Supine Hypotensive Syndrome
What is being tested?
pelvic floor muscle exercises
Could I receive a placebo?
No, everyone receives an active treatment
How many people
51 participants
Where
1 siteTurkey (Türkiye)
Study dates
1 May 2023to 2 Oct 2023
Phase
Interventional
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 40 years
  • Women only
  • Healthy volunteers accepted
  • Adult

Who may be able to join

  • Experimental group
  • Being pregnant between the ages of 18-40,
  • At least primary school graduate and able to read and write,
  • The gestational age is 20-40 weeks,
  • Not having any mental problems that prevent cooperation and understanding.
  • Control group
Show all 9Show fewer
  • Being a non-pregnant woman who is in the same age range as the experimental group,
  • At least primary school graduate and able to read and write,
  • Not having any mental problems that prevent cooperation and understanding.

Who cannot join

  • Pregnant women with acute or chronic diseases with poor placental adaptation and vascular damage such as diabetes, chronic arterial hypertension and preeclampsia, as the fetus is closer to the threshold of hypoxia and acidemia and adaptive phenomena may fail,
  • Pregnant women with intra-uterine growth restriction and fetal anomaly,
  • Pregnant women with cardiovascular disease,
  • Pregnant women considered as high risk by the obstetrician,
  • Pregnant women with premature, premature birth or miscarriage risk,
  • Pregnant women diagnosed with neurological disease,
Show all 13Show fewer
  • Obese women (body mass index > 30),
  • Women whose IVC measurements cannot be made with ultrasonography,
  • Women with severe low back pain (not able to do housework regularly),
  • Women who have been diagnosed with a psychiatric illness,
  • Women with a history of gynecological surgery,
  • Women with pelvic floor dysfunction,
  • Women who cannot lie in the supine position.

Trial locations and contacts

1 site in 1 country.

Turkey (Türkiye)1 site
  • Health Sciences University İzmir Tepecik Education and Research Hospital Gynecology and Obstetrics Clinic

    Izmir

Other trials in Turkey (Türkiye)

About this study

Official title: Investigation of Acute Effect of Pelvic Floor Muscle Exercises on Inferior Vena Cava

The aim of this study is to examine the effect of pelvic floor muscle exercises on the hemodynamic responses of the vena cava inferior in pregnant and non-pregnant women.

Read the detailed description

The IVC is responsible for approximately two-thirds of the total venous return to the heart. The blood flow in the IVC is affected by the respiratory and cardiac cycle. One of the factors affecting blood flow is pregnancy. Studies have shown that the hemodynamic responses of the IVC may vary depending on the position, and that the supine position puts pressure on the IVC during pregnancy.

Compression of the growing fetus against the IVC can cause supine hypotensive syndrome and fetal danger. However, there is no definite finding about the effects of exercise performed in the supine position. Jefferys et al. reported that the reduction in blood flow at rest is twice that that occurs during exercise and that the level of blood flow should not be a cause for concern in healthy asymptomatic women who choose to exercise in the supine position in late pregnancy. Based on this information, we predict that pelvic floor muscle exercises can change the hemodynamic responses of the IVC and reduce the compression on it.

In order to evaluate the effect of pelvic floor muscle exercises on hemodynamic responses of IVC and compression on it, pregnant and non-pregnant women will be measured by ultrasonography. Women eligible for the study will be seated and rested for 30 minutes before taking the measurement. Then, he will be taken to the supine position, rested for 2 minutes, and the first measurements will be taken at the 3rd minute. pelvic floor muscle exercises will be applied for 5 minutes as stated in the literature. Ultrasonographic measurements will be repeated in the supine position immediately after the pelvic floor exercises and 5 minutes after the exercise. Measurements will be applied to all participants in the same order. During the exercises blood pressure, heart rate and peripheral oxygen saturation will be monitored. Before and after the exercises, the heart rate and blood pressure parameters of the women will be recorded.

Being tested
pelvic floor muscle exercises

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • pelvic floor muscle exercisesOther

    Before the pelvic floor exercises are taught to all women participating in the study, a brief informational training about the function and structure of the pelvic floor and pelvis will be given using visuals. The application protocol will be given by experienced specialist physiotherapists who have received special training on pelvic floor muscle training. In this study, the training protocol described by Mørkved et al and Bø et al will be used. An exercise series will consist of slow and fast muscle contractions of the pelvic floor muscles. The exercise series will include 10 reps of maximum pelvic floor muscle contraction held for 6 seconds followed by three rapid muscle contractions. A 10-second rest period will be given between each exercise series. A total of 5 minutes, 4 repetitions of pelvic floor muscle contraction series will be applied, including the rest period.

Study groups in NCT05654324
Study groupRoleWhat they receive
Pregnant womenExperimentalPregnant women aged 18-40, 20-40 weeks of gestation.
Receives: Other: pelvic floor muscle exercises
Non-PregnantActive comparatorBeing a non-pregnant woman who is in the same age range as the experimental group.
Receives: Other: pelvic floor muscle exercises

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Change of the collapsibility index (%) of IVC

    The collapsibility index (%) of IVC will be calculated using the formula:

    [(Maximum IVC diameter - Minimum IVC diameter)/Maximum IVC diameter] × 100.

    Measured: immediately after the intervention

  2. Change of Pulsatility index of IVC

    Doppler (Toshiba Medical Systems, Aplio 400, Berlin) flow velocimetry will be evaluated.

    Measured: immediately after the intervention

  3. Changes of IVC diameters

    M mode ultrasonography will be used for expiratory (IVC d min) and end-inspiratory (IVC d min) diameter measurement.

    Measured: immediately after the intervention

Secondary outcomes (3)
  1. Change of the collapsibility index (%) of IVC

    The collapsibility index (%) of IVC will be calculated using the formula:

    [(Maximum IVC diameter - Minimum IVC diameter)/Maximum IVC diameter] × 100.

    Measured: 5 minutes after the intervention

  2. Change of Pulsatility index of IVC

    Doppler (Toshiba Medical Systems, Aplio 400, Berlin) flow velocimetry will be evaluated.

    Measured: 5 minutes after the intervention

  3. Changes of IVC diameters

    M mode ultrasonography will be used for expiratory (IVC d min) and end-inspiratory (IVC d min) diameter measurement.

    Measured: 5 minutes after the intervention

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted16 Dec 2022
  2. Study start1 May 2023
  3. Primary completion1 Oct 2023
  4. Study completion2 Oct 2023

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Prevention
Allocation
Non-randomised
Intervention model
Parallel groups
Model description
This research is a prospective and controlled study. The data of the study will be collected from pregnant women (Experimental group) and non-pregnant women (Control group).
Masking
Double blind
Who is masked
Participant, Outcomes assessor
Enrolment
51 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05654324
Sponsor's protocol ID
İEÜ_SYY
Status last verified
Nov 2023
First submitted
30 Nov 2022
Last updated
2 Nov 2023
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Publications

  • Klein-Weigel PF, Elitok S, Ruttloff A, Reinhold S, Nielitz J, Steindl J, Lutfi P, Rehmenklau-Bremer L, Hillner B, Fuchs H, Wrase C, Herold T, Beyer L. Inferior vena cava-syndrome. Vasa. 2021 Jul;50(4):250-264. doi: 10.1024/0301-1526/a000919. Epub 2021 Jan 18.

    PubMed 33459041
  • Gagne MP, Richebe P, Loubert C, Drolet P, Gobert Q, Denault A, Zaphiratos V. Ultrasound evaluation of inferior vena cava compression in tilted and supine term parturients. Can J Anaesth. 2021 Oct;68(10):1507-1513. doi: 10.1007/s12630-021-02051-w. Epub 2021 Jul 1.

    PubMed 34212308
  • Fields JM, Catallo K, Au AK, Rotte M, Leventhal D, Weiner S, Ku BS. Resuscitation of the pregnant patient: What is the effect of patient positioning on inferior vena cava diameter? Resuscitation. 2013 Mar;84(3):304-8. doi: 10.1016/j.resuscitation.2012.11.011. Epub 2012 Nov 21.

    PubMed 23178869
  • Practice Guidelines for Obstetric Anesthesia: An Updated Report by the American Society of Anesthesiologists Task Force on Obstetric Anesthesia and the Society for Obstetric Anesthesia and Perinatology. Anesthesiology. 2016 Feb;124(2):270-300. doi: 10.1097/ALN.0000000000000935. No abstract available.

    PubMed 26580836
  • Supine lying during pregnancy. Journal of Pelvic, Obstetric and Gynaecological Physiotherapy. 2018; 122:77-83

  • Jeffreys RM, Stepanchak W, Lopez B, Hardis J, Clapp JF 3rd. Uterine blood flow during supine rest and exercise after 28 weeks of gestation. BJOG. 2006 Nov;113(11):1239-47. doi: 10.1111/j.1471-0528.2006.01056.x. Epub 2006 Sep 15.

    PubMed 16978230
  • Kim DR, Wang E. Prevention of supine hypotensive syndrome in pregnant women treated with transcranial magnetic stimulation. Psychiatry Res. 2014 Aug 15;218(1-2):247-8. doi: 10.1016/j.psychres.2014.04.001. Epub 2014 Apr 12.

    PubMed 24768354
  • Finnerty NM, Panchal AR, Boulger C, Vira A, Bischof JJ, Amick C, Way DP, Bahner DP. Inferior Vena Cava Measurement with Ultrasound: What Is the Best View and Best Mode? West J Emerg Med. 2017 Apr;18(3):496-501. doi: 10.5811/westjem.2016.12.32489. Epub 2017 Feb 24.

    PubMed 28435502
  • Shailja S, Gupta I, Suri V. Inferior vena cava diameters in pregnant women for prediction of pregnancy-induced hypertension. Int J Gynaecol Obstet. 2004 Feb;84(2):164-5. doi: 10.1016/S0020-7292(03)00157-7. No abstract available.

    PubMed 14871520
  • Singh Y, Anand RK, Gupta S, Chowdhury SR, Maitra S, Baidya DK, Singh AK. Role of IVC collapsibility index to predict post spinal hypotension in pregnant women undergoing caesarean section. An observational trial. Saudi J Anaesth. 2019 Oct-Dec;13(4):312-317. doi: 10.4103/sja.SJA_27_19.

    PubMed 31572075
  • Dodhy AA. Inferior Vena Cava Collapsibility Index and Central Venous Pressure for Fluid Assessment in the Critically Ill Patient. J Coll Physicians Surg Pak. 2021 Nov;31(11):1273-1277. doi: 10.29271/jcpsp.2021.11.1273.

    PubMed 34689482
  • Morkved S, Bo K, Schei B, Salvesen KA. Pelvic floor muscle training during pregnancy to prevent urinary incontinence: a single-blind randomized controlled trial. Obstet Gynecol. 2003 Feb;101(2):313-9. doi: 10.1016/s0029-7844(02)02711-4.

    PubMed 12576255
  • Yakit Yesilyurt S, Ramazanoglu I, Tosun G, Ozer M, Celiker Tosun O. Does Pelvic Floor Muscle Exercise Change the Hemodynamic Responses of the Inferior Vena Cava in Pregnant Women? A Prospective-Controlled Study. Int Urogynecol J. 2024 Aug;35(8):1653-1662. doi: 10.1007/s00192-024-05860-x. Epub 2024 Jul 4.

    PubMed 38963506

Questions about this trial

What is this clinical trial studying?

A study testing pelvic floor muscle exercises in people with Supine Hypotensive Syndrome, run by Izmir University of Economics at 1 site in Turkey (Türkiye).

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 9 inclusion and 13 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 2 Nov 2023. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Turkey (Türkiye). Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Change of the collapsibility index (%) of IVC (time frame: immediately after the intervention). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT05654324, which also lists 13 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 2 Nov 2023.

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