- ICH GCP
- Amerikanska kliniska prövningsregistret
- Klinisk prövning NCT01115166
Blood Volume and Fluid Kinetics in Patients Undergoing Extracorporal Circulation
Studieöversikt
Status
Betingelser
Detaljerad beskrivning
In many clinical situations, such as extensive surgery, it is of value to determine blood volume and rate of fluid loss from the intravascular space, since hypo- and hypervolemia are combined with increased morbidity and mortality. In this study we which to use the large variations in hemoglobin during extracorporal to calculate both these variables.
Hemoglobin is measured every 5 minutes during one hour beginning shortly before start of the heart-lung machine. When the extracorporal circulation begins the hemoglobin decreases due to the quick mix and dilution of the priming fluid from the heart-lung machine with the patients blood.
From the amount of priming fluid and the fall of the hemoglobin, the blood volume can be calculated. If no further fluid is given the next 20 to 30 minutes, the hemoglobin concentration will in most cases increase as a result of the fluid loss from the vascular space. This increase in combination with the diureses can be used to calculate the intravascular fluid loss to the interstitium during surgery.
Sodium concentration will also be measured in parallel with the hemoglobin concentration.
The Sodium concentrations in combination with given and excreted (urine)Sodium can be used in a mass balance to calculate if intracellular edema is induced.
Studietyp
Inskrivning (Faktisk)
Kontakter och platser
Studieorter
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-
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Linkoeping, Sverige, 581 85
- University Hospital, Thoracic operation ward
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Deltagandekriterier
Urvalskriterier
Åldrar som är berättigade till studier
Tar emot friska volontärer
Kön som är behöriga för studier
Testmetod
Studera befolkning
Beskrivning
Inclusion Criteria:
- open heart surgery, with extracorporal circulation
- consent to participation
Studieplan
Hur är studien utformad?
Designdetaljer
Kohorter och interventioner
Grupp / Kohort |
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Cardiac surgery
Patients subjected to open cardiac surgery with the help of extracorporal circulation.
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Vad mäter studien?
Primära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
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Blood Volume
Tidsram: 30 minutes after start of CPB
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volume kinetic technique: During start of cardio pulmonary by-pass a known amount of fluid will expand the blood volume and dilute the hemoglobin.
To achieve the blood volume prior to anesthesia a hemoglobin value before anesthesia and the last hemoglobin value before CPB are used to correct the blood volume calculation. In this way blood volume prior to anaesthesia can be calculated. |
30 minutes after start of CPB
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Sekundära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
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Intracellular Edema
Tidsram: 30 minutes after CPB
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Mass balance based on repeated Sodium concentration, fluid volume given, given and excreted Sodium. A positive value indicating intracellular fluid accumulation and a negative value indicating cell dehydration. This is the change that will occur during the first 30 min after start of cardio pulmonary bypass. |
30 minutes after CPB
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Andra resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
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Fluid Extravasation
Tidsram: Two distribution half-times. Approximately 16 minutes.
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Rate of fluid transfer from the intravascular to the extravascular compartment during two distribution half-times.
Graph derived from the hemoglobin change during 20 to 30 minutes after start of cardio pulmonary by-pass.
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Two distribution half-times. Approximately 16 minutes.
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Samarbetspartners och utredare
Sponsor
Utredare
- Huvudutredare: Joachim Zdolsek, MD, PhD, University Hospital, Linköping, Sweden
Publikationer och användbara länkar
Studieavstämningsdatum
Studera stora datum
Studiestart
Primärt slutförande (Faktisk)
Avslutad studie (Faktisk)
Studieregistreringsdatum
Först inskickad
Först inskickad som uppfyllde QC-kriterierna
Första postat (Uppskatta)
Uppdateringar av studier
Senaste uppdatering publicerad (Uppskatta)
Senaste inskickade uppdateringen som uppfyllde QC-kriterierna
Senast verifierad
Mer information
Termer relaterade till denna studie
Nyckelord
Andra studie-ID-nummer
- BVECC
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