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Valsalva Maneuver

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41. Pleural Sliding During Valsalva and Muller Maneuvers

Pleural Sliding During Valsalva and Muller Maneuvers Pleural Sliding During Valsalva and Muller Maneuvers - Full Text View - ClinicalTrials.gov Hide glossary Glossary Study record managers: refer to the if submitting registration or results information. Search for terms x × Study Record Detail Saved Studies Save this study Warning You have reached the maximum number of saved studies (100). Please remove one or more studies before adding more. Pleural Sliding During Valsalva and Muller Maneuvers (...) lung sliding and seashore sign were found during each deep spontaneous breath. These findings have led to the hypothesis that these artifacts may be due to the contraction of the intercostal muscles. The objective of the present study is to reproduce such artifacts during contraction of the inspiratory and expiratory muscles with closed glottis (Valsalva and Muller maneuvers): in this condition each subject is not ventilating and the two pleural layers are not sliding one over each other. Condition

2015 Clinical Trials

42. Autonomic Responses During the Valsalva Maneuver and Deep Breathing Test Depend on the Experimental Setup

Autonomic Responses During the Valsalva Maneuver and Deep Breathing Test Depend on the Experimental Setup Autonomic Responses During the Valsalva Maneuver and Deep Breathing Test Depend on the Experimental Setup - Full Text View - ClinicalTrials.gov Hide glossary Glossary Study record managers: refer to the if submitting registration or results information. Search for terms x × Study Record Detail Saved Studies Save this study Warning You have reached the maximum number of saved studies (100 (...) ). Please remove one or more studies before adding more. Autonomic Responses During the Valsalva Maneuver and Deep Breathing Test Depend on the Experimental Setup The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our for details. ClinicalTrials.gov Identifier: NCT02397681 Recruitment Status : Completed First Posted : March 25, 2015 Last Update Posted

2015 Clinical Trials

43. A unique case of valsalva retinopathy in a conch blower (Full text)

A unique case of valsalva retinopathy in a conch blower Valsalva hemorrhagic retinopathy is a form of preretinal hemorrhage that develops after a valsalva maneuver, leading to rupture of the superficial retinal capillaries. Here, we report a case of valsalva retinopathy secondary to blowing a conch, the first case report of its kind. The patient blew conch, which was part of his daily ritual to pray to God as he was a Hindu priest.A 58-year-man developed an acute decrease in vision to 5/60 (...) in his right eye after blowing the conch while performing "Puja," which is the act of praying to God in Hindu culture. Ophthalmoscopy showed a fresh preretinal hemorrhage over the macula in his right eye. YAG laser membranotomy was performed, and his vision returned to 6/6.Conch "Shankha" is a religious instrument used routinely in Hindu culture. Its mechanism is very much similar to that of a wind instrument. This is the first case report of valsalva retinopathy caused by conch blowing.

2017 American journal of ophthalmology case reports PubMed

44. The effects of Valsalva maneuver on venipuncture pain in children: comparison to EMLA(®) (lidocaine-prilocaine cream). (PubMed)

The effects of Valsalva maneuver on venipuncture pain in children: comparison to EMLA(®) (lidocaine-prilocaine cream). Venipuncture is one of the most painful events for children in hospitals. Valsalva maneuver (VM) decreases the incidence and severity of pain on venipuncture pain in adults. This study was designed to evaluate VM as compared with Eutectic Mixture of Local Anesthetic (EMLA(®)) cream for venipuncture pain in children.In this study, we evaluated the effect of VM on venipuncture

2014 Irish journal of medical science

45. Cerebral hemodynamics during graded Valsalva maneuvers. (Full text)

Cerebral hemodynamics during graded Valsalva maneuvers. The Valsalva maneuver (VM) produces large and abrupt changes in mean arterial pressure (MAP) that challenge cerebral blood flow and oxygenation. We examined the effect of VM intensity on middle cerebral artery blood velocity (MCAv) and cortical oxygenation responses during (phases I-III) and following (phase IV) a VM. Healthy participants (n = 20 mean ± SD: 27 ± 7 years) completed 30 and 90% of their maximal VM mouth pressure for 10 s

2014 Frontiers in physiology PubMed

46. The cerebrovascular response to graded Valsalva maneuvers while standing. (Full text)

The cerebrovascular response to graded Valsalva maneuvers while standing. The Valsalva maneuver (VM) produces large and abrupt increases in mean arterial pressure (MAP) at the onset of strain (Phase I), however, hypotension, sufficient to induce syncope, occurs upon VM release (phase III). We examined the effect of VM intensity and duration on middle cerebral artery blood velocity (MCAv) responses. Healthy men (n =10; mean ± SD: 26 ± 4 years) completed 30%, 60%, and 90% of their maximal VM

2014 Physiological reports PubMed

47. The Effect of Modified Valsalva Maneuver on Filling Degree of Internal Jugular Vein

The Effect of Modified Valsalva Maneuver on Filling Degree of Internal Jugular Vein The Effect of Modified Valsalva Maneuver on Filling Degree of Internal Jugular Vein - Full Text View - ClinicalTrials.gov Hide glossary Glossary Study record managers: refer to the if submitting registration or results information. Search for terms x × Study Record Detail Saved Studies Save this study Warning You have reached the maximum number of saved studies (100). Please remove one or more studies before (...) adding more. The Effect of Modified Valsalva Maneuver on Filling Degree of Internal Jugular Vein The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our for details. ClinicalTrials.gov Identifier: NCT02095002 Recruitment Status : Completed First Posted : March 24, 2014 Last Update Posted : March 26, 2014 Sponsor: Fudan University Information provided

2014 Clinical Trials

48. Doppler ultrasonography measurement of hepatic hemodynamics during Valsalva maneuver: healthy volunteer study (Full text)

Doppler ultrasonography measurement of hepatic hemodynamics during Valsalva maneuver: healthy volunteer study The aim of our study was to assess the hemodynamic change of liver during the Valsalva maneuver using Doppler ultrasonography.Thirty healthy men volunteers were enrolled (mean age, 25.5±3.64 years). The diameter, minimal and maximal velocities, and volume flow of intrahepatic inferior vena cava (IVC), middle hepatic vein (MHV), and right main portal vein (RMPV) was measured during both (...) rest and Valsalva maneuver. These changes were compared using paired t-test.The mean diameters (cm) of the intrahepatic IVC at rest and Valsalva maneuver were 1.94±0.40 versus 0.56±0.66 (P<0.001). The mean diameter (cm), minimal velocity (cm/sec), maximal velocity (cm/sec), and volume flow (mL/min) of MHV at rest and Valsalva maneuver were 0.60±0.15 versus 0.38±0.20 (P<0.001), -7.98±5.47 versus 25.74±13.13 (P<0.001), 21.34±6.89 versus 35.12±19.95 (P=0.002), and 106.94±97.65 versus 153.90±151.80 (P

2014 Ultrasonography PubMed

49. The Association Between Kristeller Maneuver and Pelvic Floor Trauma After Vaginal Delivery

is to investigate levator ani muscle (LAM) injury, loss of tenting, biometric measurements of LAM and genital hiatus after vaginal delivery and investigate the association between fundal pressure in the second stage of labor (Kristeller maneuver). All recruited women will be invited to undergo a transperineal 3D ultrasound (TPUS) scan at 24 hours after delivery. we will acquire two 3D volumes for each patient: one under maximum pelvic floor muscle contraction (PFMC) and the other under maximum Valsalva's (...) maneuver. Ballooning" will diagnosed with a pelvic hiatal area of more than 25 cm2 during maximum Valsalva. A complete avulsion of the puborectalis muscle will diagnose if an abnormal insertion of the muscle will be detected on all three central slices. We will use a levator-urethral gap more than 2.5 cm to define an abnormal insertion. Secondary Outcome Measures : Urogenital prolapse [ Time Frame: 3 months ] Evaluation of pelvic floor damage after vaginal delivery. Urogenital prolapse will be defined

2018 Clinical Trials

50. Fundal pressure in second stage of labor (Kristeller maneuver) is associated with higher risk of levator ani muscle avulsion. (PubMed)

independent risk factors for LAM avulsion.During the study period, 134 women in the Kristeller maneuver group and 128 women in the control group underwent TPU assessment. Women who underwent the Kristeller maneuver had a higher prevalence of LAM avulsion than did controls (38/134 (28.4%) vs 18/128 (14.1%); P = 0.005). In addition, women in the Kristeller-maneuver group had a larger hiatal area on maximum Valsalva maneuver and a greater increase in hiatal area from rest to maximum Valsalva. On multivariate (...) Fundal pressure in second stage of labor (Kristeller maneuver) is associated with higher risk of levator ani muscle avulsion. To investigate the association between application of fundal pressure during the second stage of labor (Kristeller maneuver) and the risk of levator ani muscle (LAM) injury.This was a prospective case-control study of women recruited immediately after their first vaginal delivery in our university hospital between March 2014 and September 2016. Women who underwent

2018 Ultrasound in Obstetrics and Gynecology

51. Influence of sex, menstrual cycle, and oral contraceptives on cerebrovascular resistance and cardiorespiratory function during Valsalva or standing (Full text)

; n = 14, 22.0 ± 0.8 yr old) or without (NOC; n = 12, 21.8 ± 0.5 yr old) oral contraceptive (OC) use underwent the Valsalva maneuver and a supine-sit-stand protocol. Blood pressure, normalized stroke volume [stroke volume index (SVi)], cardiac output index, heart rate, end-tidal CO2, and middle cerebral artery (MCA) blood flow velocity were measured. When subjected to the Valsalva maneuver, all women had a greater increase in diastolic and mean MCA blood flow velocity than men (P ≤ 0.065 (...) , cardiovascular, and/or cerebrovascular physiology.NEW & NOTEWORTHY We have found sex differences in the cerebrovascular response to the Valsalva maneuver and standing. Men have greater cerebral vasoconstriction (or women have greater cerebral vasodilation) during late phase II of the Valsalva maneuver, and the cerebrovascular resistance index increases in men, but not in women, during standing. Furthermore, our findings indicate that both the menstrual cycle phase and oral contraceptive use can influence

2017 Journal of Applied Physiology PubMed

52. Comparison of Force Exerted on the Sternum During a Sneeze Versus During Low-, Moderate-, and High-Intensity Bench Press Resistance Exercise With and Without the Valsalva Maneuver in Healthy Volunteers. (PubMed)

Comparison of Force Exerted on the Sternum During a Sneeze Versus During Low-, Moderate-, and High-Intensity Bench Press Resistance Exercise With and Without the Valsalva Maneuver in Healthy Volunteers. Sternal precautions are intended to prevent complications after median sternotomy, but little data exist to support the consensus recommendations. To better characterize the forces on the sternum that can occur during everyday events, we conducted a prospective nonrandomized study of 41 healthy (...) volunteers that evaluated the force exerted during bench press resistance exercise and while sneezing. A balloon-tipped esophageal catheter, inserted through the subject's nose and advanced into the thoracic cavity, was used to measure the intrathoracic pressure differential during the study activities. After the 1 repetition maximum (1-RM) was assessed, the subject performed the bench press at the following intensities, first with controlled breathing and then with the Valsalva maneuver: 40% of 1-RM

2013 American Journal of Cardiology

53. Autonomic dysfunction in patients with orthostatic dizziness: validation of orthostatic grading scale and comparison of Valsalva maneuver and head-up tilt testing results. (PubMed)

Autonomic dysfunction in patients with orthostatic dizziness: validation of orthostatic grading scale and comparison of Valsalva maneuver and head-up tilt testing results. To investigate whether the Korean version of the Orthostatic Grading Scale (KOGS) is a reliable and valid measure for evaluating the severity of symptoms of orthostatic intolerance (OI) and to compare the diagnostic accuracy of Valsalva maneuver (VM) and head-up tilt test (HUTT) in identifying sympathetic adrenergic failure

2013 Journal of the neurological sciences

54. Comparison of the Effect on Right Atrial Pressure of Abdominal Compression Versus the Valsalva Maneuver. (PubMed)

Comparison of the Effect on Right Atrial Pressure of Abdominal Compression Versus the Valsalva Maneuver. When the right atrial pressure (RAP) exceeds the left atrial pressure, right-to-left shunting can occur. Normally, the Valsalva maneuver is used to facilitate elevation of RAP. However, performing the Valsalva maneuver can be problematic in certain situations. The aim of this study was to test the hypothesis that the application of abdominal pressure would increase the pressure within (...) the right atrium compared with the left atrium, making it an adequate alternative to the Valsalva maneuver. Twelve patients were prospectively evaluated during right-sided cardiac catheterization with the application of abdominal pressure as well as a Valsalva maneuver. RAP and left atrial pressure were measured simultaneously. In 11 patients, the mean RAP was lower than the mean pulmonary capillary wedge pressure at baseline. The mean RAP was significantly higher than the mean pulmonary capillary wedge

2013 American Journal of Cardiology

55. No Effect of Valsalva Maneuver or Trendelenburg Angle on Axillary Vein Size. (PubMed)

No Effect of Valsalva Maneuver or Trendelenburg Angle on Axillary Vein Size. A new technique for establishing ultrasound-guided central access involves the use of the axillary vein, the distal projection of the subclavian vein, via the lateral chest.To examine the effects of Valsalva maneuver and Trendelenburg positioning on axillary vein cross-sectional area (CSA).Using a group-sequential design, we enrolled stable emergency patients and measured their axillary veins sonographically. Patients (...) were measured while supine, then after a Valsalva maneuver, and then at 5°, 10°, 15°, and 17° of Trendelenburg positioning, pausing 2 min after each change. We asked patients to score their discomfort from 0 to 10 in each position.We enrolled 30 adult patients with a median age of 39 years (range, 20-66 years). Treating physicians considered 11 of these patients to have hypovolemia. The Valsalva maneuver decreased CSA (Mean difference = -0.03 cm(2)), (95% confidence interval [CI] -0.10-0.04

2013 Journal of Emergency Medicine

56. Comparison of the use of the Valsalva maneuver and the eutectic mixture of local anesthetics (EMLA(®)) to relieve venipuncture pain: a randomized controlled trial. (PubMed)

Comparison of the use of the Valsalva maneuver and the eutectic mixture of local anesthetics (EMLA(®)) to relieve venipuncture pain: a randomized controlled trial. Intravenous cannulation is a painful and stressful procedure. The objective of this study was to compare the analgesic efficacy of the eutectic mixture of local anesthetics (EMLA(®)) with that of the Valsalva maneuver in adult patients during i.v. cannulation.One hundred ninety-five patients were randomized prospectively to three (...) groups. The dorsum of the nondominant hand was covered with a thick paste of 2.5 g of EMLA(®) cream in the EMLA(®) group (group E) and left for a minimum of 30 min before venipuncture. In the control group (group C), the same procedure was applied except that Vaseline(®) was used instead of the EMLA(®). The Valsalva group (group V) were punctured during a Valsalva maneuver. The patients were placed in the supine position during venipuncture. The patients then scored the amount of pain on cannulation

2013 Journal of anesthesia

57. Spectral-domain Optical Coherence Tomography of the Choroid During Valsalva Maneuver. (PubMed)

Spectral-domain Optical Coherence Tomography of the Choroid During Valsalva Maneuver. To evaluate the influence of Valsalva maneuver on the morphology and thickness of the choroid at the macular area.Prospective interventional case series.Institutional setting. Nine healthy volunteers performed macular spectral-domain optical coherence tomography using enhanced-depth imaging at rest and during a Valsalva maneuver. Horizontal and vertical B-scans centered on the fovea were acquired. Subfoveal (...) and average choroidal thickness in the central 3 mm were compared in the resting position and during the Valsalva maneuver using manual and semiautomatic measuring tools. Changes in choroidal thickness were evaluated.There was no statistically significant difference in choroidal thickness at rest or during Valsalva maneuver in any of the compared groups. The subfoveal thickness difference was -4.1 μm on horizontal scans (P = .28) and 1.4 μm on vertical scans (P = .75). The mean choroidal thickness

2012 American Journal of Ophthalmology

58. Dynamic changes in anterior segment morphology during the Valsalva maneuver assessed with ultrasound biomicroscopy. (Full text)

Dynamic changes in anterior segment morphology during the Valsalva maneuver assessed with ultrasound biomicroscopy. We evaluated dynamic changes in anterior segment morphology during the Valsalva maneuver with ultrasound biomicroscopy (UBM).For this prospective observational study, a group of patients with narrow angles and a group of normal subjects were recruited. The anterior segment of subjects was imaged and analyzed quantitatively using UBM before and during the Valsalva maneuver. Changes (...) in anterior segment parameters from baseline and during the Valsalva maneuver, and the differences in parameters between the narrow angle and control groups were analyzed.Of 151 subjects recruited for the study, 68 (45.0%) were men and 83 (54.9%) had narrow angles. For the overall group, during Valsalva maneuver, the subjects' central anterior chamber depth (ACD) became shallower (from 2.286-2.262 mm, P < 0.001), and the anterior chamber angle became narrower (from 14.673-13.370 degrees, P = 0.004

2012 Investigative Ophthalmology & Visual Science PubMed

59. Cerebrovascular reactivity during the Valsalva maneuver in migraine, tension-type headache and medication overuse headache (Full text)

Cerebrovascular reactivity during the Valsalva maneuver in migraine, tension-type headache and medication overuse headache The aim of this study was to investigate, by means of transcranial Doppler ultrasound (TCD), cerebrovascular reactivity during the Valsalva maneuver (VM) during the headache-free interval in patients with migraine (M), migraine plus tension-type headache (M+TTH), and migraine plus medication overuse headache (M+MOH). A total of 114 patients (n=60 M, n=38 M+TTH, n=16 M+MOH (...) ) and n=60 controls were investigated; diagnoses were made according to the International Headache Society criteria. All subjects underwent TCD monitoring and, simultaneously, non-invasive assessment of arterial blood pressure and end-tidal CO2. Two indices were determined: the cerebrovascular Valsalva ratio (CVR) was calculated as the maximum end-diastolic flow velocity acceleration during the late straining phase of the VM [cm/s2] and the centroperipheral Valsalva ratio (CPVR) was defined

2012 Functional Neurology PubMed

60. Finger photoplethysmography during the Valsalva maneuver reflects left ventricular filling pressure (Full text)

Finger photoplethysmography during the Valsalva maneuver reflects left ventricular filling pressure It is often challenging to assess cardiac filling pressure clinically. An improved system for detecting or ruling out elevated cardiac filling pressure may help reduce hospitalizations for heart failure. The blood pressure response to the Valsalva maneuver reflects left heart filling pressure, but its underuse clinically may be due in part to lack of continuous blood pressure recording along (...) for assessing clinically meaningful categories of left heart filling pressure, using simple analysis of the waveform after a Valsalva maneuver effort that most patients can achieve.

2012 American Journal of Physiology - Heart and Circulatory Physiology PubMed

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