Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation

Search Page

MyNCBI Filters
Results by year

Table representation of search results timeline featuring number of search results per year.

Year Number of Results
1980 1
1988 1
1991 3
1992 1
1993 4
1994 18
1995 14
1996 14
1997 20
1998 20
1999 26
2000 24
2001 25
2002 10
2003 22
2004 21
2005 27
2006 21
2007 21
2008 13
2009 32
2010 19
2011 18
2012 14
2013 26
2014 16
2015 20
2016 21
2017 33
2018 19
2019 4
2020 0
Text availability
Article attribute
Article type
Publication date

Search Results

499 results
Results by year
Filters applied: . Clear all
Page 1
Standard (head-down tilt) versus modified (without head-down tilt) postural drainage in infants and young children with cystic fibrosis.
Freitas DA, et al. Cochrane Database Syst Rev 2015 - Review. PMID 25756796 Free PMC article.
OBJECTIVES: To compare the effects of standard postural drainage (greater (30° to 45° head-down tilt) and lesser (15° to 20° head-down tilt)) with modified postural drainage (greater (30º head-up tilt) or lesser (15º to 20º head-up tilt)) with regard to gastroesophageal reflux in infants and young children up to six years old with cystic fibrosis in terms of safety and efficacy. ...The 20º head-down postural drainage position was not found to be significantly different from the 20º head-up tilt modified position. ...
OBJECTIVES: To compare the effects of standard postural drainage (greater (30° to 45° head-down tilt) and lesser (15° t …
Analogs of microgravity: head-down tilt and water immersion.
Watenpaugh DE. J Appl Physiol (1985) 2016 - Review. PMID 26869710 Free article.
These methods include horizontal bed rest (BR), head-down tilt bed rest (HDT), head-out water immersion (WI), and head-out dry immersion (DI; immersion with an impermeable elastic cloth barrier between subject and water). ...
These methods include horizontal bed rest (BR), head-down tilt bed rest (HDT), head-out water immersion (WI), an …
Effects of Head-down Tilt on Nerve Conduction in Rhesus Monkeys.
Sun B, et al. Chin Med J (Engl) 2017. PMID 28139516 Free PMC article.
The -6° head-down tilt (HDT) comprises an experimental model used to simulate the space flight environment. This study investigated nerve conduction characteristics of rhesus monkeys before and after prolonged exposure to HDT. ...
The -6° head-down tilt (HDT) comprises an experimental model used to simulate the space flight environment. This study …
MRI-based assessment of acute effect of head-down tilt position on intracranial hemodynamics and hydrodynamics.
Ishida S, et al. J Magn Reson Imaging 2018. PMID 28577333
PURPOSE: To quantify the acute effect of the head-down tilt (HDT) posture on intracranial hemodynamics and hydrodynamics. MATERIALS AND METHODS: We evaluated the intracranial physiological parameters, blood flow-related parameters, and brain morphology in the HDT (-6° and -12°) and the horizontal supine (HS) positions. ...
PURPOSE: To quantify the acute effect of the head-down tilt (HDT) posture on intracranial hemodynamics and hydrodynamic …
Long-duration bed rest as an analog to microgravity
Hargens AR and Vico L. J Appl Physiol (1985) 2016 - Review. PMID 26893033 Free article.
Later concerns about the lack of similarity between headward fluid shifts in space and those with horizontal bed rest encouraged the use of 6 degree head-down tilt (HDT) bed rest as pioneered by Russian investigators. Headward fluid shifts in space may redistribute bone from the legs to the head. At present, HDT bed rest with normal volunteers is the most common analog for microgravity simulation and to test countermeasures for bone loss, muscle and cardiac atrophy, orthostatic intolerance, and reduced muscle strength/exercise capacity. ...
Later concerns about the lack of similarity between headward fluid shifts in space and those with horizontal bed rest encouraged the use of …
Effect of head-down tilt on cardiovascular control in healthy subjects: a spectral analytic approach.
Weise F, et al. Clin Sci (Lond) 1995. PMID 7705007
The effect of head-down tilt on finger blood pressure and heart rate fluctuations was studied by means of power spectral analysis in 12 healthy men. 2. ...Forearm vascular resistance was estimated to validate the head-down procedure. 3. Forearm vascular resistance decreased significantly from 19.82 (16.34-26.46) mmHg ml-1 min 100 ml to 18.05 (13.69-22.88) mmHg ml-1 min 100 ml (P < 0.01) during head-down tilt (values are medians and 25 and 75 percentiles). ...
The effect of head-down tilt on finger blood pressure and heart rate fluctuations was studied by means of power spectra …
Quantitative Pupillometry for Detection of Intracranial Pressure Changes During Head-Down Tilt.
Soeken TA, et al. Aerosp Med Hum Perform 2018. PMID 30020056
METHODS: Healthy subjects and individuals with idiopathic intracranial hypertension (IIH) underwent pupillometry in different positions (upright, supine, and head-down tilt) and during different physiological maneuvers. ...Quantitative pupillometry for detection of intracranial pressure changes during head-down tilt. Aerosp Med Hum Perform. 2018; 89(8):717-723....
METHODS: Healthy subjects and individuals with idiopathic intracranial hypertension (IIH) underwent pupillometry in different positions (upr …
Dynamic cerebral autoregulation is preserved during isometric handgrip and head-down tilt in healthy volunteers.
Skytioti M, et al. Physiol Rep 2018. PMID 29595918 Free PMC article.
We hypothesized that dynamic cerebral autoregulation is affected by changes in autonomic activity, MAP, and cardiac output (CO) induced by handgrip (HG), head-down tilt (HDT), and their combination. ...
We hypothesized that dynamic cerebral autoregulation is affected by changes in autonomic activity, MAP, and cardiac output (CO) induced by h …
Thermoregulatory response to intraoperative head-down tilt.
Nakajima Y, et al. Anesth Analg 2002 - Clinical Trial. PMID 11772833
We therefore evaluated the effects of head-down tilt on intraoperative thermal and cardiovascular regulation. Thirty-two patients undergoing lower-abdominal surgery were randomly assigned to the 1) supine, 2) 15 degrees -20 degrees head-down tilt, 3) leg-up, or 4) combination of leg-up and head-down tilt position. ...However, head-down tilt (Trendelenburg position) does not reduce the vasoconstriction threshold or aggravate hypothermia. The head-down tilt position thus does not require special perioperative thermal precautions or management unless the leg-up position is used simultaneously....
We therefore evaluated the effects of head-down tilt on intraoperative thermal and cardiovascular regulation. Thirty-tw …
499 results
Jump to page
Feedback