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The Valsalva maneuver may help check for a dural tear following certain spinal operations, such as a microdiscectomy. An increase in intra-spinal pressure will cause cerebral spinal fluid (CSF) to leak out of the dura, causing a headache. [citation needed] The Valsalva maneuver has been associated with transient global amnesia. [17] [18] [19 ...
The "Toynbee maneuver": pinching the nose and swallowing. Swallowing pulls open the eustachian tubes while the movement of the tongue, with the nose closed, compresses air which passes through the tubes to the middle ear. [2] The "Valsalva maneuver": pinching the nose and closing the mouth and trying to breathe out through the nose.
CSF pressure has been shown to be influenced by abrupt changes in intrathoracic pressure during coughing (which is induced by contraction of the diaphragm and abdominal wall muscles, the latter of which also increases intra-abdominal pressure), the valsalva maneuver, and communication with the vasculature (venous and arterial systems).
The strength of the urethra can also be tested during this phase, using a cough or Valsalva maneuver, to confirm genuine stress incontinence. Urethral pressure profilometry: measures strength of sphincter contraction. [7] Electromyography (EMG) measurement of electrical activity in the bladder neck.
The Valsalva maneuver leads to an increase in intrathoracic and intra-abdominal pressure. This enhances the structural integrity of the torso—protecting against excessive spinal flexion or extension and providing a secure base to lift heavy weights effectively and securely. [ 15 ]
There is increased intrathoracic pressure and decreased cardiac output following the Valsalva maneuver. This eventually leads to a significant decrease in circulation to the brain and ultimately, loss of consciousness. There is no postictal phase (as is seen with seizures), no incontinence, and the child is fine in between spells.
Episodes can be treated when they occur by Valsalva maneuver, adenosine injection or taking a AV node blocking agent as pill-in-pocket, but regular medication may also be used to prevent or reduce recurrence. While some treatment modalities can be applied to all SVTs, there are specific therapies available to treat some sub-types.
Both Valsalva maneuver and standing decrease venous return to the heart thereby decreasing left ventricular diastolic filling and causing more laxity on the chordae tendineae. This allows the mitral valve to prolapse earlier in systole , leading to an earlier systolic click (i.e. closer to S 1 ), and a longer murmur.