The Effect of Different Bed-Head Angles on the Haemodynamic Parameters of Intensive Care Patients Lying in the Supine Position

Study Overview
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Brief Summary
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Aim: The aim of this study was to examine the effect of different bed-head angles given to patients lying in the supine position in an intensive care unit on the haemodynamic parameters of central venous pressure, systolic and diastolic blood pressure, heart rate, breathing rate and peripheral oxygen saturation. Methods: The study was conducted with 50 intensive care patients aged 18 and over in a general surgery intensive care unit in Turkey. With each patient in the supine position, the bed-head was raised to an angle of 0, 20, 30 and 45 degrees without a pillow, and the haemodynamic parameters of central venous pressure, systolic and diastolic blood pressure, heart rate, breathing rate and peripheral oxygen saturation were recorded after 0 and 10 minutes.

Detailed Description
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Aim: The aim of this study was to examine the effect of different bed-head angles given to patients lying in the supine position in an intensive care unit on the haemodynamic parameters of central venous pressure, systolic and diastolic blood pressure, heart rate, breathing rate and peripheral oxygen saturation. Design: This was a non-randomised quasi-experimental repeated measures study. Settings: The study was conducted with 50 intensive care patients aged 18 and over in a general surgery intensive care unit in Turkey. Methods: With each patient in the supine position, the bed-head was raised to an angle of 0, 20, 30 and 45 degrees without a pillow, and the haemodynamic parameters of central venous pressure, systolic and diastolic blood pressure, heart rate, breathing rate and peripheral oxygen saturation were recorded after 0 and 10 minutes. The data obtained was evaluated using the Mann-Whitney test, the Kruskal Wallis test and the Bonferroni test.

Official Title
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The Effect of Different Bed-Head Angles on the Haemodynamic Parameters of Intensive Care Patients

Conditions
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Thyroidectomy, Colon Surgery, Cholecystectomy, Inguinal Hernia

Intervention / Treatment
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* Other: the bed-head was raised to an angle of 0, 20, 30 and 45 degrees


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: participating voluntarily in the study being aged over 18 years, having stayed in the General Surgery Intensive Care Unit for at least 24 hours, being monitored for 24 hours, having a central venous catheter inserted, having central venous pressure measured. Exclusion Criteria: being less than 18 years of age, not wanting to participate in the study, or during the course of the research, wishing to withdraw from the study, receiving sedation treatment, receiving haemodialysis treatment, having an oxygen saturation value of less than 90%, being unable to tolerate a 0° prone position (hypovolemic or bradycardic).

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 80 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Supportive Care
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: the different bed-head angles in the supine position<br>The researcher brought the patient to the supine position with the bed-head at 0 degree, and immediately (minute 0) made haemodynamic measurements: central venous pressure, systolic and diastolic blood pressure, heart rate, breathing rate and peripheral oxygen saturation. It was taken into account that this could change haemodynamic parameters, and immediately after a 10-minute period of rest, the same haemodynamic measurements were repeated. After this, the bed-head was adjusted to an angle of 20 degree, and the same procedure was repeated, with measurements after 0 and 10 minutes. The same procedure was followed with the bed-head raised to 30 degree and then to 45 degree. In positioning the patients' bed-heads to different angles, a spirit level and a protractor were used. | Other: the bed-head was raised to an angle of 0, 20, 30 and 45 degrees<br>* With each patient in the supine position, the bed-head was raised to an angle of 0, 20, 30 and 45 degrees without a pillow, and the haemodynamic parameters of central venous pressure, systolic and diastolic blood pressure, heart rate, breathing rate and peripheral oxygen saturation were recorded after 0 and 10 minutes.<br>* Other names: haemodynamic parameters were recorded;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| central venous pressure | central venous pressure in mmHg | 4 months | 
| blood pressure | blood pressure pressure in mmHg | 4 months | 
| heart rate | heart rate in beats | 4 months | 
| breathing rate | breathing rate in breaths | 4 months | 
| peripheral oxygen saturation | peripheral oxygen saturation in % | 4 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| weight | weight in kilograms | 4 months | 
| height | height in meters | 4 months | 
| BMI | BMI in kg/m^2 | 4 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Intensive care units, haemodynamic parameters, central venous pressure, supine position, bed-head angle