scholarly journals Ringer's acetate solution-induced precipitation of remimazolam

Author(s):  
Haruka Sasaki ◽  
Hiroshi Hoshijima ◽  
Kentaro Mizuta
2000 ◽  
Vol 53 (7) ◽  
pp. 463-468
Author(s):  
Yoshimasa SAKAMOTO ◽  
Hirofumi ANDO ◽  
Kunio KOBAYASHI ◽  
Hiroharu MATSUSHITA ◽  
Tatsuo SUZUKI ◽  
...  

2004 ◽  
Vol 106 (3) ◽  
pp. 307-313 ◽  
Author(s):  
Dan DROBIN ◽  
Robert G. HAHN

Pre-eclampsia (PE) is a disease of pregnancy associated with peripheral oedema and hypovolaemia, but few details are known about how women with PE handle a volume load of crystalloid fluid compared with healthy pregnant women. To study this issue, Ringer's acetate solution (12.5 ml/kg of body weight) was given by intravenous infusion over 30 min to eight women with PE and to eight healthy pregnant women matched with respect to gestational week (mean, 34 weeks). Venous blood was sampled and excreted urine was collected over 90 min to study the time course of the volume expansion by means of volume kinetic analysis. The results show that the size of the central body fluid space expanded by the infused fluid was smaller in PE (mean, 2940 ml compared with 4240 ml respectively; P<0.04), and the clearance constants for distribution (100 ml/min compared with 43 ml/min; P<0.04) and elimination (125 ml/min compared with 36 ml/min; P<0.02) were higher in the women with PE than in the controls. Less excess volume accumulated in the central body fluid space in the presence of PE, whereas the rates of distribution and elimination were higher during and for 15 min after the infusion. It is concluded that Ringer's acetate solution fluid is both distributed and eliminated faster in women with PE than in matched pregnant controls.


2001 ◽  
Vol 16 (1) ◽  
pp. 9-13 ◽  
Author(s):  
Christer Svensén ◽  
Fredrik Sjöstrand ◽  
Robert G. Hahn

AbstractIntroduction:To study the volume effect of isotonic and hypertonic crystalloid fluid during ambulance transports after mild trauma, a prospective case-control study was initiated, using the ambulance and helicopter transport system in Stockholm.Methods:The hemodilution resulting from intravenous infusion of 1.0 L of Ringer's acetate solution (n = 7) or 250 ml of 7.5% sodium chloride (n = 3) over 30 minutes (min) was measured every 10 min during 1 hour when fluid therapy was instituted at the scene of an accident, or on arrival at the hospital. The dilution was studied by volume kinetic analysis and compared to that of matched, healthy controls who received the same fluid in hospital.Result:The hemodilution at the end of the infusions averaged 7.7% in the trauma patients and 9.1% in the controls, but the dilution was better maintained after trauma. The kinetic analysis showed that the size of the body fluid space expanded by Ringer's solution was 4.6 L and 3.8 L for the trauma and the control patients, respectively, while hypertonic saline expanded a slightly larger space. For both fluids, trauma reduced the elimination rate constant by approximately 30%.Conclusion:Mild trauma prolonged the intravascular persistence of isotonic and hypertonic crystalloid fluid as compared to a control group.


Surgery ◽  
1996 ◽  
Vol 119 (6) ◽  
pp. 684-689 ◽  
Author(s):  
Toshio Nakatani ◽  
Yoshimasa Sakamoto ◽  
Hirofumi Ando ◽  
Kunio Kobayashi

1999 ◽  
Vol 90 (1) ◽  
pp. 81-91 ◽  
Author(s):  
Dan Drobin ◽  
Robert G. Hahn

Background The amount of Ringer's solution needed to restore normal blood volumes is thought to be three to five times the volume of blood lost. This therapy can be optimized by using a kinetic model that takes accounts for the rates of distribution and elimination of the infused fluid. Methods The authors infused 25 ml/kg Ringer's acetate solution into 10 male volunteers who were 23 to 33 yr old (mean, 28 yr) when they were normovolemic and after 450 ml and 900 ml blood had been withdrawn. One-volume and two-volume kinetic models were fitted to the dilution of the total venous hemoglobin and plasma albumin concentrations. Results Withdrawal of blood resulted in a progressive upward shift of the dilution-time curves of both markers. The two-volume model was statistically justified in 56 of the 60 analyzed data sets. The hemoglobin changes indicated that the body fluid space expanded by the infused fluid had a mean total volume of 10.7 l(+/-0.9 SEM). The elimination rate constant (kr) decreased with the degree of hypovolemia and was 133 ml/min (22 ml/min [SEM]), 100 ml/min (39 ml/min [SEM]), and 34 ml/min (7 ml/min [SEM]), respectively (P &lt; 0.01). Plasma albumin indicated a slightly larger body fluid space expanded by the infused fluid, but kr was less (P &lt; 0.02). Hypovolemia reduced the systolic and diastolic blood pressures by approximately 10 mmHg (P &lt; 0.05). Conclusions The dilution of the blood and the retention of infused Ringer's solution in the body increases in the presence of hypovolemia, which can be attributed chiefly to a reduction of the elimination rate constant.


Burns ◽  
2014 ◽  
Vol 40 (5) ◽  
pp. 871-880 ◽  
Author(s):  
Jochen Gille ◽  
Birgit Klezcewski ◽  
Michael Malcharek ◽  
Thomas Raff ◽  
Martin Mogk ◽  
...  

Author(s):  
H.A. Cohen ◽  
W. Chiu ◽  
J. Hosoda

GP 32 (molecular weight 35000) is a T4 bacteriophage protein that destabilizes the DNA helix. The fragment GP32*I (77% of the total weight), which destabilizes helices better than does the parent molecule, crystallizes as platelets thin enough for electron diffraction and electron imaging. In this paper we discuss the structure of this protein as revealed in images reconstructed from stained and unstained crystals.Crystals were prepared as previously described. Crystals for electron microscopy were pelleted from the buffer suspension, washed in distilled water, and resuspended in 1% glucose. Two lambda droplets were placed on grids over freshly evaporated carbon, allowed to sit for five minutes, and then were drained. Stained crystals were prepared the same way, except that prior to draining the droplet, two lambda of aqueous 1% uranyl acetate solution were applied for 20 seconds. Micrographs were produced using less than 2 e/Å2 for unstained crystals or less than 8 e/Å2 for stained crystals.


Author(s):  
O. H. Kapp ◽  
M. Ohtsuki ◽  
N. Robin ◽  
S. N. Vinogradov ◽  
A. V. Crewe

Annelid extracellular hemoglobins are among the largest known proteins (M.W = 3.9 x 106), and together with the hemocyanins are the largest known oxygen carriers. They display oxygen affinities generally higher than those o vertebrate hemoglobins with Hill coefficients ranging from slightly higher than unity to values as high as 5-6. These complex molecules are composed of multiple copies of as many as six different polypeptides and posse: approximately 150 hemes per molecule.The samples were diluted to 100-200 μg/ml with distilled water just before application to a thin carbon film (∽15 Å thick). One percent (w/v) uranyl acetate solution was used for negative staining for 2 minutes and dried in air. The specimens were examined with the high resolution STEM. Their general appearance is that of a hexagonal bilayer (Fig. 1), each layer consisting of six spheroidal subunits. The corner to corner hexagonal dimensic is approximately 300 Å and the bilayer thickness approximately 200 Å.


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