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Alexandria Journal of Anaesthesia and Intensive Care<br />

<strong>Autoclaved</strong> <strong>Gelatin</strong> (<strong>Haemagel</strong>) <strong>Versus</strong> <strong>6%</strong> <strong>Hydroxyethyl</strong> <strong>Starch</strong><br />

<strong>200</strong>/0.5 (Haes-steril) For Plasma Volume Expansion In Critically-ill<br />

Patients<br />

Magdy Ali Omera, MD * , Salah A. Ismail, MD *<br />

* Assistant Prof. of Anaesthesia, Faculty of Medicine, Suez Canal University.<br />

ABSTRACT<br />

Synthetic colloids are used to optimize hemodynamics in the critically ill patients and a<br />

debate about the most suitable one is still present. The influence of short term infusion of<br />

autoclaved gelatin (<strong>Haemagel</strong>) and <strong>6%</strong> hydroxyethyl starch <strong>200</strong>/0.5 (Haes-steril) on<br />

hemodynamic, respiratory, coagulation, renal and oncotic parameters were examined in a<br />

prospective randomized study.<br />

Method: Thirty patients suffering from systemic hypoperfusion due to sepsis in ICU of Suez<br />

Canal University Hospital were assigned into 2 equal groups. In GEL group: 1000 ml of<br />

<strong>Haemagel</strong> was infused within an hour, while in HES group: 1000 ml of <strong>6%</strong> Haes-steril<br />

<strong>200</strong>/0.5 was given within an hour. The hemodynamic, respiratory, hematological,<br />

coagulation, renal and colloidal osmotic pressure parameters were recorded before and after<br />

infusion of both colloids.<br />

Results: There was a significant similar increase in hemodynamic variables (Mean arterial<br />

pressure, central venous pressure, cardiac index, stroke volume index and left ventricular<br />

stroke work index) in both groups. Also, a significant improvement in tissue perfusion as<br />

judged by decreased arterial lactate was found. There were no significant differences in any<br />

of the measured respiratory parameters (respiratory rate, arterial oxygen saturation, arterial<br />

blood gases and intrapulmonary shunt) in the studied groups. No significant intergroup<br />

difference in any haemodynamic or respiratory variable was demonstrated. A significant<br />

expansion in plasma volume as indicated by the significant reduction in haematocrit was<br />

detected. There were insignificant changes in coagulation profile (prothrombin time,<br />

activated partial thromboplastin time, bleeding time and fibrinogen) in either group except the<br />

platelet count which was significantly reduced in both groups without any recorded bleeding<br />

complications. Creatinine, blood urea nitrogen, sodium and potassium didn't change and<br />

were comparable in the two groups. Colloidal osmotic pressure and urine output increased<br />

significantly in either group. Anaphylactic reactions were not observed in any of the patients.<br />

However, no significant differences between both groups in haematological, coagulation,<br />

renal and oncotic parameters were found.<br />

Conclusion: Both autoclaved gelatin (<strong>Haemagel</strong>) and <strong>6%</strong> hydroxyethyl starch <strong>200</strong>/0.5<br />

(Haes-steril) are safe and equally effective colloids for plasma volume expansion in critically<br />

ill patients without apparent adverse effects on respiration, coagulation and renal functions.<br />

INTRODUCTION<br />

In critically-ill patients, acute circulatory<br />

failure is often associated with<br />

intravascular volume depletion which<br />

contributes to inadequate cardiac output,<br />

tissue hypoperfusion, and development of<br />

multiple organ failure (1) . Replacement of<br />

intravascular deficit remains the most<br />

important therapeutic maneuver in management<br />

of those patients to ensure adequate<br />

cardiac output (2) . Whilst crystalloids<br />

are virtually free of major side effects,<br />

they don ' t necessarily ensure adequate<br />

volume replenishment or hemodynamic<br />

AJAIC-Vol. (8) No. 2 June <strong>200</strong>5<br />

44<br />

stabilization. There are several studies<br />

showing the advantages of colloid solution<br />

over crystalloid volume replacement (3,4)<br />

and a debate about the choice of specific<br />

colloid is still present (5) . Although the<br />

naturally occurring colloidal agent (albumin)<br />

is effective for fluid resuscitation, it is also<br />

very expensive with the potential risk of<br />

infection (6) . Dextran has not been widely<br />

used because it might result in increased<br />

bleeding, allergic reaction, possible renal<br />

toxicity and problems with blood crossmatching<br />

(7) .


Alexandria Journal of Anaesthesia and Intensive Care<br />

<strong>Hydroxyethyl</strong> starch (HES), a synthetic<br />

colloid with a high volume expanding<br />

effect, is produced by hydroxylation of<br />

the starch amylopectin. HES (<strong>200</strong>/0.5)<br />

has a molecular weight (<strong>200</strong>,000 D)<br />

which allows rapid elimination by kidney<br />

(8) . It also has a low molar substitution<br />

ratio (0.5) making it more rapidly and<br />

completely degraded by circulating<br />

amylase with less tissue retention (8) .<br />

Since HES has the fewest<br />

anaphylactoid reactions among the<br />

artificial colloids, it is the most comm.only<br />

clinically used colloid (9) . However,<br />

large doses of this solution may<br />

increase bleeding by inducing coagulopathy<br />

through an effect on factor VIII<br />

activity (8, 10-12) .<br />

Different colloid solutions containing<br />

gelatin have been developed. Collagen<br />

is degraded via both a thermal effect<br />

producing oxypolygelatin (OPG), and an<br />

enzymatic effect producing either<br />

modified fluid gelatin (Gelofusine), or<br />

urea cross-linked gelatin (Haemaccel),<br />

while double degradation and autoclaving<br />

producing (<strong>Haemagel</strong>). <strong>Haemagel</strong><br />

is a balanced salt gelatin-based<br />

colloidal solution (100 mL contains 4 g<br />

gelatin). It has a higher half-life, no<br />

pseudo agglutination, and no possible<br />

contamination (13) . Although researchers<br />

have studied gelatin for volume<br />

replacement, its safety and efficacy<br />

have not been fully investigated (14-18) .<br />

So, this study compared autoclaved<br />

gelatin (<strong>Haemagel</strong>) with <strong>6%</strong> hydroxylethyl<br />

starch <strong>200</strong>/0.5 (Haes-steril) in term<br />

of efficacy and safety as a short term<br />

volume expander in critically-ill patients.<br />

PATIENTS AND METHODS<br />

After approval of the local ethics<br />

committee and an informed consent<br />

from each patient or his/her family, thirty<br />

critically-ill patients in ICU of Suez Canal<br />

University Hospital suffering from systemic<br />

hypoperfusion due to sepsis were<br />

enrolled in this study. Inclusion criteria<br />

were patients who required fluid therapy<br />

AJAIC-Vol. (8) No. 2 June <strong>200</strong>5<br />

45<br />

on a clinical ground in the presence of<br />

sepsis and systemic hypo-perfusion.<br />

Sepsis was diagnosed, in addition to<br />

positive blood culture, by the presence<br />

of 3 of the following 5 criteria;<br />

tachycardia (HR >100 beat/min), tachypnea<br />

(RR >25 breath/min), temperature<br />

(>38 0 C or 15,000 or 100 mg/dl), cerebral hemorrhage,<br />

patients having PT >18 sec, aPTT >45<br />

sec, fibrinogen < 150 mg/dl or Hct


Alexandria Journal of Anaesthesia and Intensive Care<br />

heart rate (HR), core temperature<br />

(Temp), respiratory rate (RR), arterial<br />

oxygen saturation (SaO2) and noninvasive<br />

mean arterial blood pressure<br />

(MAP) measurement through a continuous<br />

display (S/5, Datex Ohmeda, Instrumentation<br />

Corp, Finland).<br />

Baseline data were recorded before the<br />

start of infusion;<br />

A] Patient characteristics: Age, sex,<br />

weight, height, body surface area (BSA),<br />

temperature and clinical diagnosis.<br />

B] Hemodynamic parameters: HR,<br />

MAP, CVP, CI, SVI, LVSWI and SVRI<br />

were measured in supine position.<br />

C] Respiratory data: RR, SaO2, arterial<br />

blood gases [pH, arterial oxygen tension<br />

(PaO2), arterial carbon dioxide tension<br />

(PaCO2), bicarbonate (HCO3)] and<br />

intrapulmonary shunt [obtained through<br />

ABL 520 Radiometer].<br />

D] Hematological and coagulation<br />

parameters: Haematocrit (Hct), platelet<br />

count, prothrombin time (PT), activated<br />

partial thromboplastin time (aPTT),<br />

bleeding time (BT) and fibrinogen (22) .<br />

E] Renal function and electrolytes: Urine<br />

output (UOP), serum creatinine, blood<br />

urea nitrogen (BUN), serum sodium<br />

(Na + ) and potassium (K + ) (22) .<br />

F] Colloidal osmotic pressure (COP)<br />

and arterial lactate (AL) were also<br />

measured.<br />

Using a randomized sequence, the<br />

patients were prospectively assigned to<br />

one of the following groups:<br />

1) Group (GEL): where 1000 ml of<br />

<strong>Haemagel</strong> (each 100 ml contains:<br />

<strong>Autoclaved</strong> gelatin 4 g, glycine 1 g, NaCl<br />

0.859 g, KCl 0.0389 g and CaCl 0.029<br />

g, Vacsera, Holding company for<br />

biological products and vaccines, Egypt)<br />

was infused during an hour.<br />

2) Group (HES): where 1000 ml of <strong>6%</strong><br />

Haes-steril (HES <strong>200</strong>/0.5, MW <strong>200</strong>,000,<br />

DS 0.5, Fresenius Kabi, Bad Hamburg,<br />

Germany) was infused during an hour.<br />

After the end of infusion, all the previous<br />

parameters were recorded again by a<br />

AJAIC-Vol. (8) No. 2 June <strong>200</strong>5<br />

46<br />

physician not involved in the study and<br />

who was blind to the grouping.<br />

All results are expressed as means ±<br />

SD. The change in different parameters<br />

compared to the baseline values was<br />

analyzed using paired t-test. The<br />

difference between the two groups was<br />

assessed by one way analysis of variant<br />

(ANOVA). A p value


Alexandria Journal of Anaesthesia and Intensive Care<br />

both groups. In addition, there was a<br />

significant decrease in platelet count in<br />

GEL and HES groups. However, no<br />

significant differences between both<br />

groups in any hematological or coagulation<br />

parameter were detected (table<br />

4).<br />

Renal function and electrolytes<br />

Urine volume increased significantly<br />

after infusion of both colloids without<br />

significant differences between both<br />

groups. Creatinine, BUN and electrolytes<br />

(Na + and K + ) were not changed<br />

and were comparable in both groups<br />

(table 5).<br />

Colloidal osmotic pressure<br />

In both groups, the baseline COP<br />

was within normal range (more than 18<br />

mmHg). After infusion, there was a<br />

significant increase in both groups<br />

without intergroup differences (table 6).<br />

No allergic reactions or bleeding<br />

complications were recorded in any<br />

studied patient<br />

DISCUSSION<br />

Hypovolemia is a common clinical<br />

occurrence in severe sepsis and fluid<br />

resuscitation remains one of the most<br />

important interventions. However, it is<br />

AJAIC-Vol. (8) No. 2 June <strong>200</strong>5<br />

47<br />

still uncertain which solution is most<br />

suitable for fluid resuscitation in these<br />

patients (9) . The goal in fluid resuscitation<br />

is to maintain an effective intravascular<br />

blood volume, subsequently, enhancing<br />

cardiac output, oxygen delivery and<br />

tissue perfusion (1,2,6) . However, to achieve<br />

these goals, attempts are tried to<br />

minimize possible deterioration in<br />

pulmonary, renal and other system<br />

functions.<br />

The aim of this study was to<br />

compare the effect of short-term infusion<br />

of autoclaved gelatin and <strong>6%</strong> hydroxylethyl<br />

starch on hemodynamic, respiratory,<br />

hematologic, coagulation, renal<br />

and oncotic pressure variables in a<br />

controlled prospective manner.<br />

In the present study, MAP, CVP, CI,<br />

SVI and LVSWI were significantly<br />

increased in both groups. While SVRI<br />

and AL were significantly decreased,<br />

HR did not change significantly during<br />

the study. However, no significant<br />

differences between the studied groups<br />

in these parameters were found. The<br />

improvement in these hemodynamic<br />

variables and arterial lactate levels are<br />

always associated with favorable<br />

prognosis in critically-ill patients (1, 2) .<br />

Table 1: Demographic data in both <strong>Haemagel</strong> (GEL) and Haes-steril (HES)<br />

groups.<br />

Parameter<br />

Age (years)<br />

Sex ( M/F)<br />

Weight (kg)<br />

BSA (m 2 )<br />

Temperature ( 0 C)<br />

GEL group<br />

55 ± 11<br />

7/8<br />

73 ± 12<br />

1.88 ± 0.20<br />

37.3 ± 0.4<br />

Number of patients<br />

15<br />

Diagnosis: Pneumonia<br />

6<br />

Peritonitis<br />

6<br />

Urinary infection<br />

3<br />

Data are represented as means ± SD unless otherwise noted.<br />

M = Male, F = Female, BSA = Body surface area.<br />

HES group<br />

53 ± 13<br />

8/7<br />

75 ± 10<br />

1.86 ± 0.23<br />

38.0 ± 0.3<br />

15<br />

7<br />

6<br />

2


Alexandria Journal of Anaesthesia and Intensive Care<br />

Table 2: Hemodynamic and arterial lactate changes in both <strong>Haemagel</strong> (GEL)<br />

and Haes-steril (HES) groups.<br />

Parameter<br />

Group Baseline data Post infusion data<br />

HR (beat/min)<br />

GEL<br />

100 ± 7<br />

99 ± 8<br />

HES<br />

102 ± 5<br />

103 ± 7<br />

MAP (mmHg)<br />

GEL 62.2 ± 2.7<br />

74.3 ± 5.1*<br />

HES 60.5 ± 7.6<br />

73.1 ± 4.3*<br />

CVP (cmH2O)<br />

GEL<br />

5.6 ± 1.4<br />

9.3 ± 1.5*<br />

HES<br />

4.8 ± 1.9<br />

8.5 ± 1.3*<br />

CI (L/min.m GEL<br />

2.2 ± 0.3<br />

3.5 ± 0.6*<br />

HES<br />

2.3 ± 0.2<br />

3.5 ± 0.4*<br />

2 )<br />

SVI (ml/m GEL 29.0 ± 6.6<br />

37.5 ± 3.8*<br />

HES 27.7 ± 3.1<br />

35.5 ± 4.6*<br />

2 )<br />

LVSWI (gm.m/m GEL 20.8 ± 3.6<br />

35.6 ± 3.3*<br />

HES 21.6 ± 5.4<br />

35.2 ± 4.2*<br />

2 )<br />

SVRI (dyne.sec/cm GEL 1861 ± 149 1558 ± 246*<br />

HES 1978 ± 222 1660 ± 234*<br />

5 .m 2 )<br />

AL (mmol/L)<br />

GEL<br />

2.7 ± 1.6<br />

1.4 ± 1.2*<br />

HES<br />

2.9 ± 1.4<br />

1.5 ± 1.5*<br />

Data are presented as means ± SD.<br />

*A significant difference within each group compared to baseline P < 0.05.<br />

HR = Heart rate, MAP = Mean arterial pressure, CVP = Central venous pressure, CI<br />

= Cardiac index, SVI = Stroke Volume index, LVSWI = Left ventricular stroke work<br />

index, SVRI = Systemic vascular resistance index, AL = Arterial lactate.<br />

Table 3: Respiratory changes in both <strong>Haemagel</strong> (GEL) and Haes-steril (HES)<br />

groups.<br />

Parameter<br />

Group Baseline data Post infusion data<br />

RR (breath/min)<br />

GEL<br />

20.0 ± 2<br />

19.0 ± 3<br />

HES<br />

22.0 ± 4<br />

21.0 ± 3<br />

SaO2 (%)<br />

GEL<br />

96.0 ± 1.7<br />

97.1 ± 1.3<br />

HES<br />

97.5 ± 0.5<br />

98.6 ± 0.7<br />

pH<br />

GEL 7.33 ± 0.06 7.37 ± 7.34 ± 0.05 7.38 ±<br />

HES<br />

0.03<br />

0.02<br />

PaO2 (mmHg)<br />

GEL<br />

88.0 ± 16<br />

90.0 ± 12<br />

HES<br />

86.0 ± 18<br />

88.0 ± 14<br />

PaCO2 (mmHg)<br />

GEL<br />

33.0 ± 2.7<br />

35.0 ± 2.3<br />

HES<br />

36.0 ± 1.5<br />

38.0 ± 2.0<br />

HCO3 (mmol/L)<br />

GEL<br />

19.3 ± 2.3<br />

20.0 ± 1.7<br />

HES<br />

17.9 ± 1.5<br />

18.4 ± 1.4<br />

Qs/Qt (%)<br />

GEL<br />

16.5 ± 3<br />

17.1± 5<br />

HES<br />

18.3 ± 4<br />

19.0 ± 5<br />

Data are presented as means ± SD and percentage.<br />

RR = Respiratory rate, SaO2 = Arterial oxygen saturation, PaO2 = Arterial oxygen<br />

tension, PaCO2 = Arterial carbon dioxide tension, HCO3 = Bicarbonate and Qs/Qt =<br />

Intra-pulmonary shunt fraction.<br />

AJAIC-Vol. (8) No. 2 June <strong>200</strong>5<br />

48


Alexandria Journal of Anaesthesia and Intensive Care<br />

Table 4: Hematologic and coagulation changes in both <strong>Haemagel</strong> (GEL) and<br />

Haes-steril (HES) groups.<br />

Parameter<br />

Group Baseline data Post infusion data<br />

Hct (%)<br />

GEL 38.8 ± 3.4<br />

30.2 ± 3.2*<br />

HES 36.9 ± 2.8<br />

29.5 ± 4.7*<br />

PT (sec)<br />

GEL 14.7 ± 0.5<br />

15.0 ± 0.8<br />

HES 13.9 ± 1.2<br />

14.4 ± 0.6<br />

aPTT (sec)<br />

GEL 35.7 ± 3.3<br />

37.2 ± 3.1<br />

HES 38.5 ± 2.9<br />

39.8 ± 2.4<br />

BT (min)<br />

GEL<br />

6.2 ± 0.4<br />

6.4 ± 0.2<br />

HES 5.8 ± 0.6<br />

6.0 ± 0.3<br />

Fibrinogen (mg/dl) GEL<br />

300 ± 88<br />

295 ± 64<br />

HES 320 ± 77<br />

310 ± 45<br />

Platelets (1000/mm GEL<br />

<strong>200</strong> ± 48<br />

150 ± 86*<br />

HES 210 ± 55<br />

150 ± 37*<br />

3 )<br />

Data are presented as means ± SD.<br />

*A significant difference within each group compared to baseline P < 0.05.<br />

Hct = Hematocrit, PT = Prothrombin time, aPTT = Activated partial thromboplastin<br />

time, BT = Bleeding time.<br />

Table 5: Electrolytes and renal changes in both <strong>Haemagel</strong> (GEL) and Haessteril<br />

(HES) groups.<br />

Parameter<br />

Group Baseline data Post infusion data<br />

UOP (ml/h)<br />

GEL 50 ± 15<br />

90 ± 20*<br />

HES 55 ± 10<br />

95 ± 15*<br />

Creatinine (mg/dl) GEL 1.2 ± 0.4<br />

1.3 ± 0.2<br />

HES 1.3 ± 0.5<br />

1.3 ± 0.3<br />

BUN (mg/dl)<br />

GEL 20.5 ± 2.3<br />

20.1 ± 1.5<br />

HES 22.2 ± 1.4<br />

21.8 ± 1.9<br />

Na GEL 138 ± 6<br />

137 ± 5<br />

HES 136 ± 9<br />

136 ± 7<br />

+ (mmol/L)<br />

K GEL 3.9 ± 0.4<br />

4.0 ± 0.2<br />

HES 4.1 ± 0.2<br />

4.1 ± 0.6<br />

+ (mmol/L)<br />

Data are presented as means ± SD.<br />

*A significant difference within each group compared to baseline P < 0.05.<br />

UOP = Urine output, BUN = Blood urea nitrogen, Na + = Sodium, K + = Potassium.<br />

Table 6: Changes in colloidal osmotic pressure (mmHg) in both <strong>Haemagel</strong><br />

(GEL) and Haes-steril (HES) groups.<br />

Group<br />

Baseline data Post infusion data<br />

GEL<br />

19.6 ± 1.1<br />

22.1 ± 1.4*<br />

HES<br />

18.5 ± 1.5<br />

21.2 ± 1.2*<br />

Data are presented as means ± SD.<br />

*A significant difference within each group compared to baseline P


Alexandria Journal of Anaesthesia and Intensive Care<br />

better normalization of the hypoxic<br />

gastric mucosal acidosis with Gelofusine<br />

(15)<br />

rather than HES. Beyer et al ,<br />

compared <strong>6%</strong> HES <strong>200</strong>/0.5 with<br />

Gelofusine for volume replacement in<br />

patients undergoing orthopedic surgery.<br />

They studied the effect of either colloid<br />

on hemodynamic, colloidal osmotic<br />

pressure and blood clotting. Equivalent<br />

hemodynamic effects were found<br />

without alteration of coagulation profile.<br />

Molnar et al (23) investigated the short<br />

term cardio-respiratory effects of 250 ml<br />

Gelofusine versus 250 ml HES <strong>200</strong>/0.6<br />

in patients with septic shock and acute<br />

lung injury. They found significant<br />

increases in CI and O2 delivery in both<br />

groups with insignificant differences in<br />

extra vascular lung water (no interstitial<br />

or pulmonary edema).<br />

The respiratory and blood gas<br />

parameters did not change significantly<br />

in both groups and were similar during<br />

the study. Consistent results were<br />

demonstrated in previous studies (2, 6) .<br />

Also, Ritto et al (16) showed no changes<br />

in arterial blood gases after Gelofusine<br />

or HES infusion, with no shunt affection.<br />

Expansion of plasma volume as<br />

indicated by the significant decrease in<br />

hematocrit was similar in both groups.<br />

Both colloids have been shown to cause<br />

a slight insignificant prolongation in PT,<br />

aPTT and BT in addition to an<br />

insignificant decrease in fibrinogen. This<br />

could be attributed to hemodilution<br />

which in another previous study (24) , was<br />

proven to be dose related. There was a<br />

significant decrease in platelet count<br />

without significant change in bleeding<br />

time in any group of the current study.<br />

The present work showed neither<br />

significant differences between the two<br />

colloids with respect to coagulation<br />

parameters, nor bleeding complications.<br />

Several previous researches studied the<br />

influence of hydroxyethyl starch and<br />

gelatin on coagulation and bleeding<br />

parameters (10,11,17,24-29) . Fries et al (10)<br />

analyzed the influence of different<br />

AJAIC-Vol. (8) No. 2 June <strong>200</strong>5<br />

50<br />

colloids (<strong>6%</strong> HES 130/0.4, <strong>6%</strong> HES<br />

<strong>200</strong>/0.5 and Gelofusine) on the<br />

coagulation system using Rotation<br />

Thrombelastography (ROTEG). They<br />

found that Gelofusine had the lowest<br />

effect on coagulation. Haisch et al (11)<br />

examined the influence of HES 130/0.4<br />

versus Gelofusine on coagulation and<br />

hemodynamic data in patients undergoing<br />

major abdominal surgery, where<br />

both colloids were effective with<br />

insignificant changes in coagulation<br />

variables or blood loss. The effect of<br />

progressive in vitro hemodilution on<br />

coagulation was measured by<br />

SONOCLOT (17) , where HES showed the<br />

largest impact on markers of<br />

coagulation compared with gelatin or<br />

lactated Ringer's solution. In an<br />

experimental study (25) , HES infusion in<br />

excess of 20 ml /kg was associated with<br />

an increase in bleeding time, thrombin<br />

time together with a decrease in platelet<br />

count and serum fibrinogen. Also, Van<br />

Wyk et al (26) did not find any evidence<br />

that haemaccel affects haemostasis;<br />

neither does it increase bleeding relative<br />

to Ringer's lactate in plasma expansion<br />

during reduction mammoplasty. In<br />

addition, Amany et al (27) showed only<br />

minor effects on clotting variables and<br />

platelet aggregation compared to <strong>6%</strong><br />

HES <strong>200</strong>/0.5, even at doses more than<br />

20 ml/Kg /day in patients undergoing<br />

major abdominal surgery. On the<br />

contrary, limited data suggest that<br />

gelatin based solutions may affect<br />

coagulation (28, 29) .<br />

The significant increase in UOP was<br />

probably due to increased blood volume<br />

in both groups. Creatinine, BUN, Na +<br />

and K + did not change significantly and<br />

were comparable in both groups<br />

indicating insignificant effects on kidney<br />

functions. These results are consistent<br />

with Vogt et al study (12) . In contrast,<br />

Amany et al found that creatinine<br />

clearance was significantly decreased in<br />

HES group compared to <strong>Haemagel</strong><br />

group (27) .


Alexandria Journal of Anaesthesia and Intensive Care<br />

Colloidal osmotic pressure (COP)<br />

could be a desirable goal in volume<br />

replacement because it maintains<br />

normal extravascular water content in<br />

many organs (1, 6) . Profound reduction in<br />

COP may reduce left ventricular<br />

compliance, increase pulmonary extravascular<br />

water content and decrease<br />

tissue oxygen delivery (19) . In this study<br />

GEL and HES were effective in<br />

maintaining COP without significant<br />

differences between both groups. This<br />

was also documented by several studies<br />

where plasma volume and colloid<br />

osmotic pressure were maintained even<br />

in septic shock with capillary leak (30-32) .<br />

In fact, no allergic reactions to either<br />

colloid were observed in any patient of<br />

the present study. This is agrees with<br />

previous researches on either colloid<br />

where extremely low incidence of such<br />

reaction was reported (9, 33) .<br />

In conclusion, autoclaved gelatin<br />

(<strong>Haemagel</strong>) showed similar efficacy and<br />

safety as <strong>6%</strong> hydroxyethyl starch<br />

<strong>200</strong>/0.5 (Haes-steril) for plasma volume<br />

expansion in critically ill patients. Both<br />

solutions improved the hemodynamic<br />

responses and tissue perfusion without<br />

apparent adverse effects on respiration,<br />

coagulation, and renal functions. A<br />

further study may be required to<br />

evaluate the effects of prolonged<br />

administration or larger doses of this<br />

gelatin solution (<strong>Haemagel</strong>) in critically<br />

ill patients.<br />

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