Valsalva maneuver VM non-invasive test was described for the first time by Antonio Maria Valsalva an Italian anatomist, physician, and surgeon in 1704. It was first used in otolaryngology, in 1851 was used for the cardiovascular purpose for the first time by Edward Weber so it sometimes named Valsalva- Edward maneuver.
Valsalva maneuver is a forced expiration against a closed glottis, associated with an increase in the intrathoracic and intra-abdominal pressure. It is simple but associated with complex cardiovascular changes, controlling the arterial blood pressure was one of the first aims as it is affected by signals of the baroreceptor.
The maneuver/ test may be associated with signs during applications most are visible for example; blushing, headache, dizziness, jugular vein distension. special care should be taken when dealing with a patient having a history of coronary artery disease, congenital heart disease, intraocular lens implantation as there is an increase in intra-ocular and intra-abdominal pressure.
Valsalva test is used widely with different specialties and has different instruments and different applications according to the field and the target it is used for.
- Neurological cases, lumbar and cervical radiculopathy, the test is associated with an increase in intrathoracic pressure, and a slight increase in the intraspinal pressure cause radicular pain exacerbation, which may indicate the nerve is compressed by an intervertebral disc or nearby anatomy.
- Women health is used as a urodynamic test for assessment of pelvic organ prolapse, and urinary incontinence to assess sphincter function by using valsalva leak pressure point, that indicates the pressure at which urine leakage occurs.
- As a diagnostic and treatment maneuver for cardiovascular disease, diagnosis of heart abnormalities specifically with using ECG. heart murmurs, a marker to heart failure, and treatment for supraventricular tachycardia carried at clinical labs with precautions and emergency equipment.
- Normalize middle ear pressure, during the hyperbaric oxygen therapy to protect middle ear trauma.
There are various descriptions for this test to carry depending on the target and the condition it is used for, the patient can perform it from sitting, supine, or semi-recumbent position, but sitting is the preferred position.
First take a normal, deep breath, hold the breath, close your glottis, then exhale against your closed glottis (close your nose and mouth) or as bearing down.
It is done for 10-15 seconds followed by normal breathing.
The test is positive if there is radicular pain exacerbate in the upper or the lower limb in neurological conditions.
A manometer with pressure 40mmHg is used during autonomic dysfunction evaluation when continuous heart rate and blood pressure monitoring is important.
When it is carried to assess the pelvic prolapse it is done during imaging, at this situation valsalvometer, or sphygmomanometer is used to better understand the maneuver, the patient blowing into a restricted flow tube starts with pressure 30–40 cm H2O, the prolapse depends on the duration the test is last and the repitition
To diagnosis heart failure the Valsalva test has 86% sensitivity, 54% specificity, and a positive likelihood ratio 1.86 when compared with electrocardiography. In addition, 100% sensitivity, 64% specificity, and a positive likelihood ratio 2.8 when compared with NT-proBNP ( a blood test for a protein produced in large amounts by heart)
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