scholarly journals Effect of Water Amount Intake before Scuba Diving on the Risk of Decompression Sickness

2021 ◽  
Vol 18 (14) ◽  
pp. 7601
Author(s):  
Kil-Hyung Han ◽  
Gwang-Suk Hyun ◽  
Yong-Seok Jee ◽  
Jung-Min Park
Keyword(s):  
Water Intake ◽  
Decompression Sickness ◽  
Bubble Formation ◽  
Scuba Diving ◽  
Scuba Divers ◽  
Daily Water Intake ◽  
Daily Water ◽  
Left And Right ◽  
The Right ◽  
Water Amount

Background and objective: The aim of this study was to investigate the influence of pre-hydration levels on circulating bubble formation for scuba divers and to evaluate the appropriate volume of water intake for reducing the risk of decompression sickness (DCS). Materials and Methods: Twenty scuba divers were classified into four groups according to the volume of water taken in before scuba diving as follows: no-water-intake group (NWIG), 30%-water-intake group (30WIG), 50%-water intake group (50WIG), and 100%-water-intake group (100WIG). We measured the circulating bubbles using movement status by Doppler on the right and left subclavian veins and precordial regions at pre-dive, post-dive, and 30 min after diving to a depth of 30 m for a duration of 25 min at the bottom. Results: Participants belonging to the 30WIG showed the lowest frequency, percentage, and amplitude of bubbles and consequently the lowest bubble grade in the left and right subclavian veins and precordial region at post-time and 30 min after diving. Conclusions: It can be inferred that pre-hydration with 30% of the recommended daily water intake before scuba diving effectively suppressed the formation of bubbles after diving and decreased the risk of DCS.

scholarly journals Design and test water intake monitor to improve human’s well-being

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Xinyang Li
Keyword(s):  
Water Intake ◽  
Energy Levels ◽  
Well Being ◽  
High Energy ◽  
The Body ◽  
Medical Provider ◽  
Normal Functions ◽  
Daily Water Intake ◽  
Daily Water ◽  
The Right

Water is a substance that the human body needs in order to survive. Drinking the right amount of water has many health benefits, including maximum physical performance, high energy levels, and improved brain function. Dehydration occurs when the body uses or loses more fluid than it takes in. When dehydration happens, the body doesn’t have enough fluids in it to carry out its normal functions. In older adults, dehydration is the most common disorder that can occur. As adults get older, the body’s fluid reserve becomes smaller, and the ability to process and conserve water is reduced. We have designed a sensor to track to the amount of water put into the body. This monitor will help seniors, especially those in a nursing home, to track their daily water intake. The sensor works with other personalized data to create a dashboard to their medical provider for better health care. There are still some limitations of the sensor. We will continue to improve the accuracy of measurement and the material we used.

Decompression Sickness in Women Recreational Scuba Divers

1999 ◽  
Vol 8 (1) ◽  
pp. 47-54
Author(s):  
Jacalyn J. Robert
Keyword(s):  
High Altitude ◽  
Decompression Sickness ◽  
Scuba Diving ◽  
Training Center ◽  
Men And Women ◽  
Recreational Sport ◽  
Scuba Divers ◽  
Hyperbaric Environment ◽  
Recreational Scuba

Recreational sport diving is becoming an increasingly popular sport for women. Women now comprise approximately 25% of the diving community according to Divers Alert Network statistics. In the diving literature it has been stated that women are at a greater risk for decompression sickness than men. Most of these statements were derived from high-altitude (hypobaric environment) studies rather than from a scuba diving (hyperbaric) environment. Data from the naval diving and salvage training center were analyzed, and it was found that women are not more susceptible to decompression sickness than men during dives between 4 and 10 atmospheres. More specific studies on sport diving should be completed on factors contributing to underwater decompression sickness in both men and women.

Self-reported quantity of daily water intake and urine output in healthy young

2012 ◽  
Vol 6 (2) ◽  
pp. 91-93 ◽  
Author(s):  
İnsaf Altun ◽  
Nursan Dede Çınar ◽  
Mağfiret Kara Kaşıkçı
Keyword(s):  
Water Intake ◽  
Urine Output ◽  
Daily Water Intake ◽  
Daily Water

Calculation method for daily water intake components using doubly labeled water

2021 ◽  
Author(s):  
Yosuke Yamada ◽  
Daiki Watanabe ◽  
Hiroyuki Sagayama ◽  
Aya Itoi ◽  
Tsukasa Yoshida ◽  
...  
Keyword(s):  
Water Intake ◽  
Elimination Rate ◽  
Total Energy Expenditure ◽  
Doubly Labeled Water ◽  
Accurate Assessment ◽  
Water Production ◽  
Daily Water Intake ◽  
Dietary Record ◽  
Daily Water ◽  
Metabolic Water

Abstract Daily water intake (DWI) is essential for survival in humans; however, accurate assessment of DWI from drinks and beverages (Wdrinks) or food moisture (Wfoods) is difficult as it depends on self-reported intakes that are prone to inaccuracy. Here, we established an objective method to assess DWI components using doubly labeled water (DLW). Deuterium and H218O were orally administered, and the dilution space and elimination rate of 2H and 18O were measured. DWI was calculated from the deuterium turnover corrected for metabolic water production and insensible water absorption from humidity. Wfoods was estimated using dietary record (Wfoods-DR) or calculated from the total energy expenditure assessed by DLW (Wfoods-DLW). The current results underscore Wfoods-DR underestimation using self-reported dietary assessments, which underestimates food intake. This study proposes novel methods for calculating each DWI component using DLW.

Question About Fluoride in Formulas

PEDIATRICS ◽  
1975 ◽  
Vol 55 (4) ◽  
pp. 572-572
Author(s):  
M. Balasubramaniam
Keyword(s):  
Dental Caries ◽  
Water Intake ◽  
Plain Water ◽  
Daily Water Intake ◽  
Daily Water

The articles on dental caries in children in the August 1974 issue of Pediatrics are interesting and made me think about the following aspect of fluoridation. As far as I can find out, none of the presently available formulas have any fluoride in them. Would it not be a good idea to add an appropriate quantity of fluoride to all the formulas so that we can make sure that babies do get fluoride from birth? Even though a majority of the babies live in areas where the water is fluoridated, the amount of daily water intake (as plain water) in the first six months of life is negligible.

94 The Effects of Weather, Body Weight, and Dry Matter Intake on Total Daily Water Intake in Beef Steers

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 49-50
Author(s):  
Zach S McDaniel ◽  
Zachary K Smith ◽  
Cody Wright ◽  
Michael Gonda ◽  
Himali Wickremasinghe ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Solar Radiation ◽  
Water Intake ◽  
Water System ◽  
Beef Steers ◽  
Beef Calves ◽  
Linear Mixed Effects ◽  
Random Intercept ◽  
Daily Water Intake ◽  
Daily Water

Abstract Weaned angus steers (n = 26; 272.92 + 21.29 kg) were selected to study the effects of weather, predicted daily BW, and DMI on total daily water intake (TDWI) from December 2019 to May 2020 (181 days). Calves were provided with ad libitum access to feed and water, under a monoslope barn, for the duration of the study. In periods of cold stress, cattle were provided with corn stalk bedding within the dry lot, away from the monoslope barn. Measurements of feed and water disappearance were obtained by utilizing an automated feed and water system (Insentec RIC, Hokofarm, Marknesse, Netherlands), where disappearance was assumed to be caused by intake. Calves were weighed every 28 days in order to calculate ADG and therefore predict daily BW for each calf. Daily weather records, including windchill (°C), solar radiation (W/m2), and maximum relative humidity (%), were obtained through the South Dakota Mesonet automated weather station located 3.86 km from where the calves were housed. A linear mixed effects model with both random intercept and slope were used to account for the within subject correlations. Increased TDWI was associated with increased wind chill (0.38-kg per 1°C; P < 0.0001), increased solar radiation (1.04-kg per 1 W/m2; P < 0.0001), and decreased maximum relative humidity (-0.14 kg per 1%; P < 0.0001). For every kg increase in DMI, TDWI increased by 1.07 kg (P < 0.0001). Lastly, for every kg increase in BW, TDWI increased by 0.05 kg (P < 0.0001). Effects of DMI, BW, SRAD, windchill, RHMax were predictive of TDWI in beef calves fed during the winter. This model will be useful for predicting TDWI during the winter months where calves are raised in regions where temperatures are regularly below freezing.

Pulmonary vein-atrial junction stretch receptors and the inhibition of drinking

1982 ◽  
Vol 242 (5) ◽  
pp. R452-R457 ◽  
Author(s):  
M. J. Moore-Gillon ◽  
J. T. Fitzsimons
Keyword(s):  
Left Atrium ◽  
Pulmonary Vein ◽  
Water Intake ◽  
Balloon Inflation ◽  
Daily Water Intake ◽  
Daily Water ◽  
Left Pulmonary Vein ◽  
First Time ◽  
Conscious Animals ◽  
Isoproterenol Infusion

A chronically implanted inflatable balloon was used to produce distension of a left pulmonary vein at its junction with the left atrium in trained conscious dogs. Balloon inflation caused a fall in the amounts of water drunk in response to injection of isoproterenol, infusion of hypertonic NaCl, or overnight water deprivation. There was also a significant increase in heart rate, but arterial, central venous, and left atrial pressures were unaltered. Blockade of the left vagosympathetic nerve prevented the inhibitory action of distension of a pulmonary vein on water intake in response to injection of isoproterenol. In experiments where the balloon was left inflated for 24 h, distension also caused a fall in the spontaneous daily water intake, whereas food intake was unaffected. Despite the fall in water intake, urine flow increased so that the dog went into negative fluid balance. In conclusion, distension of a pulmonary vein at its junction with the left atrium causes reduction in both spontaneous and induced water intake, and this inhibition is not secondary to circulatory changes or fluid retention by the kidney. The action of the receptors concerned may complement the actions of the same or similar receptors on renal function whose effects have been observed previously in acute experiments in anesthetized animals and here for the first time in conscious animals.

scholarly journals Effect of Increased Daily Water Intake and Hydration on Health in Japanese Adults

Nutrients ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 1191 ◽  
Author(s):  
Yumi Nakamura ◽  
Hiroshi Watanabe ◽  
Aiko Tanaka ◽  
Masato Yasui ◽  
Jun Nishihira ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Blood Glucose ◽  
Body Temperature ◽  
Water Intake ◽  
Fasting Blood Glucose ◽  
Intervention Group ◽  
Glucose Levels ◽  
Daily Water Intake ◽  
Daily Water ◽  
Water Supplementation

Increased hydration is recommended as healthy habit with several merits. However, supportive data are sparse. To assess the efficacy of increased daily water intake, we tested the effect of water supplementation on biomarkers in blood, urine, and saliva. Twenty-four healthy Japanese men and 31 healthy Japanese women with fasting blood glucose levels ranging from 90–125 mg/dL were included. An open-label, two-arm, randomized controlled trial was conducted for 12 weeks. Two additional 550 mL bottles of water on top of habitual fluid intake were consumed in the intervention group. The subjects drank one bottle of water (550 mL) within 2 h of waking, and one bottle (550 mL) 2 h before bedtime. Subjects increased mean fluid intake from 1.3 L/day to 2.0 L/day, without changes in total energy intake. Total body water rate increased with associated water supplementation. There were no significant changes in fasting blood glucose and arginine vasopressin levels, but systolic blood pressure was significantly decreased in the intervention group. Furthermore, water supplementation increased body temperature, reduced blood urea nitrogen concentration, and suppressed estimated glomerular filtration rate reduction. Additionally, existence of an intestinal microbiome correlated with decreased systolic blood pressure and increased body temperature. Habitual water supplementation after waking up and before bedtime in healthy subjects with slightly elevated fasting blood glucose levels is not effective in lowering these levels. However, it represents a safe and promising intervention with the potential for lowering blood pressure, increasing body temperature, diluting blood waste materials, and protecting kidney function. Thus, increasing daily water intake could provide several health benefits.

Regulatory and secondary water intake in rats with lesions of the zona incerta

1976 ◽  
Vol 230 (4) ◽  
pp. 1049-1057 ◽  
Author(s):  
MD Evered ◽  
GJ Mogenson
Keyword(s):  
Water Intake ◽  
Fluid Balance ◽  
Zona Incerta ◽  
Water Losses ◽  
Daily Food Intake ◽  
Excretory Function ◽  
Daily Food ◽  
Daily Water Intake ◽  
Electrolytic Lesions ◽  
Daily Water

Bilateral electrolytic lesions of the zona incerta (ZI) permanently reduced daily water intake of rats by 20-30%. Lesioned rats did not differ from controls in daily food intake, body weight, hematocrit, or serum osmolality, Na+ or K+ levels. The hypodipsia was not caused by changes in water requirements or excretory function or by a nonspecific depression of behavior. Compensatory reductions in water losses maintained fluid balance. Lesioned rats drank as much water as controls in response to intracellular and extracellular dehydration, but unlike controls, appeared to restrict their daily water intake to these regulatory responses. Lesions of the ZI attenuated the ingestion of extra water observed when rats were maintained on a liquid diet adequate to meet fluid requirements, and daily water intake of lesioned but not control rats closely followed changes in water needs. It was concluded that lesions of the ZI reduce daily water intake towards minimal requirements for fluid balance by attenuating secondary drinking (drinking independent of water needs for fluid homeostasis.

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