KIKUCHI, R., SASAKI, T. and TAKISHIMA, T. Disappearance Curves and Single-Breath DLCO from Consecutive Samples during Slow Expiration. Tohoku J. exp. Med., 1982, 136 (4), 419-431 The disappearance of CO in three expirates consecutively sampled after various breath holding periods was measured in seven normal subjects. The CO disappearance curves in the three expired portions were nearly linear ...

BACKGROUND Breath-holding attacks are common during childhood. Iron supplementation has been claimed to reduce the frequency or severity, or both, of breath-holding attacks in children. OBJECTIVES To assess the effect of iron supplementation on the frequency and severity of breath-holding attacks in children. SEARCH STRATEGY We searched the Cochrane Central Register of Controlled Trials (CE...

BACKGROUND AND PURPOSE Blood flow of the internal jugular vein and intracranial venous sinuses is affected by respiratory state. The purpose of this study was to clarify the changes in flow velocity and direction and signal intensities of sigmoid sinuses on phase-contrast (PC) MR images obtained with regular breathing and with deep inspiratory breath holding. METHODS One hundred seven subject...

Ambulatory blood pressure measurement, which has been confined to research for many years, is now an accepted investigation in clinical practice [ l ] . In an effort to ensure that the devices meet the requirements of clinical practice the British Hypertension Society (BHs) has published a comprehensive protocol for the evaluation of blood pressure measuring devices with special reference to am...

BACKGROUND Experience with the original protocols of the Association for the Advancement of Medical Instrumentation (AAMI) and the British Hypertension Society (BHS) for validating blood pressure has provided valuable insight into the methodological problems associated with device validation and has influenced both the BHS and the AAMI in revising their protocols. OBJECTIVES To review the rev...

Introduction In whole body MRI with continuously moving table (CMT-MRI) the acquisition time is an important issue. In particular for examinations performed during breath holding, the number of required breath holding phases should be small and the duration of each breath holding phase as short as possible. In the 2D multi-slice approach to CMT-MRI investigated here, parallel imaging with no hi...

OBJECTIVE Ultrasonographic studies have demonstrated transient reduction in spleen volume in relation to apnea diving. We measured spleen volume under various respiratory conditions by MR imaging to accurately determine the influence of ordinary breath holding on spleen volumetry. MATERIALS AND METHODS Twelve healthy adult volunteers were examined. Contiguous MR images of the spleen were acqu...

When a subject is totally immersed in water while holding his breath, a loss of buoyancy occurs.This phenomenon can be demonstrated by resting the subject on 1 pan of a balance, the loss of buoyancy being reflected as a gain in weight on the balance. This gain in weight (or loss of buoyancy) was first observed by us while determining body density by an underwater weighing method (1). This gain ...

Background Cardiac magnetic resonance imaging (CMRI) for infants and young children typically requires sedation. General anaesthesia can eliminate motion artefact and permits controlled ventilation with breath-holding during imaging to limit respiratory artefact, but this technique typically requires frequent changes in respiratory support that may impair pulmonary function, and pauses in image...

The purpose of this study was to investigate how fast three-dimensional (3D) MR image quality is affected by breath-holding and to develop an optimal breath-holding strategy that minimizes artifact in the event of an incomplete breath-hold. A computer model was developed to study variable-duration breath-holds during fast 3D imaging. Modeling was validated by 3D gradient-echo imaging performed ...