Different Intra-abdominal Pressures and Optic Nerve Size
Condition: Major Surgery; Intraabdominal Hypertension; Optic Nerve Congestion
MeSH terms: Intra-Abdominal Hypertension
Study type: Observational [Patient Registry]

Summary: 
      In intensive care patients, high intraabdominal pressure is frequently encountered.
      Intra-abdominal pressure is often measured as high, especially after major abdominal surgery
      procedures. In recent years, various studies have reported that the increase in optic nerve
      diameter measured by ultrasound correlates with the level of intracranial pressure. Optic
      nerve diameter measurement with ultrasound is a non-invasive procedure. Intra-abdominal
      pressure measurements are also routinely performed in intensive care patients. In the
      measurement of abdominal pressure, the bladder catheter, which is already available in every
      patient who comes to intensive care, is used. In this study, the intra-abdominal pressure
      values present in the file of each patient undergoing major abdominal surgery who were taken
      to intensive care unit will be taken. Orbital USG will be performed on the 6th, 12th and 24th
      hours on admission to the intensive care unit to measure the diameter of the optic nerve, and
      the relationship between the intra-abdominal pressure value and optic nerve diameters will be
      investigated.
    

Detailed description: 
      In intensive care patients, high intraabdominal pressure is frequently encountered.
      Intra-abdominal pressure is often measured as high, especially after major abdominal surgery
      procedures. This situation creates ischemia in the abdominal organs in the patient, decreases
      venous return as a result of inferior vena cava compression and leads to a decrease in
      cardiac output. In addition, intracranial pressure frequently increases as a result of the
      venous circulation being affected. In recent years, various studies have reported that the
      increase in optic nerve diameter measured by ultrasound correlates with the level of
      intracranial pressure. Optic nerve diameter measurement with ultrasound is a non-invasive
      procedure. Intra-abdominal pressure measurements are also routinely performed in intensive
      care patients. In the measurement of abdominal pressure, the bladder catheter, which is
      already available in every patient who comes to intensive care, is used. In this study, the
      intra-abdominal pressure values present in the file of each patient undergoing major
      abdominal surgery who were taken to intensive care unit will be taken. Orbital USG will be
      performed on the 6th, 12th and 24th hours on admission to the intensive care unit to measure
      the diameter of the optic nerve, and the relationship between the intra-abdominal pressure
      value and optic nerve diameters will be investigated.
    

Intervention name(s): Intraabdominal pressure and optic nerve diameters
Intervention type(s): Procedure
Intervention description(s): Measuring Intraabdominal pressure with a Foley cathater and measuring optic nerve diameters with a USG
Observational model: Case-Crossover
Time perspective: Prospective
Sampling method: Non-Probability Sample
Study population: 
        Postoperative patients followed in intensive care