View clinical trials related to Perfusion Index.
Filter by:BACKGROUND: The steep Trendelenburg position and pneumoperitoneum are used to improve surgical visibility in robot-assisted laparoscopic radical prostatectomy (RALRP). However, these procedures can lead to hemodynamic changes. This study aimed to investigate the effects of these interventions on the perfusion index (PI) and the Pleth variability index (PVI) in patients undergoing RALRP under general anesthesia. METHODS: Fifty-three patients scheduled for RALRP underwent standard monitoring; PI and PVI values were monitored using a finger probe. PI, PVI, hemodynamic and respiratory parameters, and intraabdominal pressure were recorded before and after anesthesia induction, after adopting the Trendelenburg position, after pneumoperitoneum, after pneumoperitoneum and the Trendelenburg position, at 15 min, 30 min, in the supine position, after carbon dioxide (CO2) desufflation, and after extubation.
The study is a prospective, randomised, controlled double-blind clinical trial. The primary aim was to evaluate the efficacy of caudal block and ilioinguinal-iliohypogastric nerve block with PI and PVI in pediatric inguinal hernia operations under general anesthesia. The secondary aim is to evaluate postoperative analgesic agent consumption and to evaluate the correlation of PI and PVI values with hemodynamic parameters. Pediatric patients between the ages of 2-8 years who are planned to undergo elective inguinal hernia operation will be included in the study. After the patients scheduled for inguinal hernia surgery are admitted to the operating room, routine monitoring will be performed as performed. In addition to routine monitoring, a Radical-97TM Pulse CO-OximeterTM (Masimo Corp, Irvine, CA, USA) probe will be attached to the toe to monitor PI and PVI. Patients will be given anaesthetic drugs as routinely administered. After LMA by randomisation by closed envelope method, caudal or ilioinguinal-iliohypogastric nerve block will be performed by an experienced anaesthetist as the investigators routinely perform in patients other than the control group.. PI, PVI, pulse, saturation, noninvasive arterial pressure values will be recorded before induction, after induction, after LMA, before applied block, after applied block (after surgical incision) at 0, 5, 10, 15, 20, 25 and 30 minutes and at the end of anaesthesia. All patients will be given paracetamol 10mg/kg iv, which is a routine intravenous (iv) analgesic, at the end of surgery. In case of perioperative complications, the complications will be recorded. Flacc pain scale (Face, Legs, Activity, Cry, Consolability) will be applied at 0, 2, 6 hours postoperatively. Postoperative analgesic use and discharge time will be recorded. Flacc pain scale will be performed by an anaesthetist blinded to the study.
The purpose of this pilot feasibility study is to evaluate the ability of the Perfusion Index to predict the return to spontaneous circulation of the out-of-hospital cardiac arrest patient during cardiopulmonary resuscitation. The performance of the perfusion index will also be compared to the current gold standard, end-tidal CO2 (EtCO2).
Spinal anesthesia (SA) is the most preferred method of anesthesia in cesarean deliveries because it eliminates the potential risks associated with airway management in pregnant women. Spinal anesthesia poses a risk of hypotension with an incidence of approximately 70%, resulting from decreased vascular tone due to sympathetic block. Hypotension can cause dizziness in the mother, nausea and vomiting, and acidosis in the fetus. Therefore, the prevention and treatment of postspinal hypotension has been an important area of research in obstetric anesthesia. The Perfusion Index (PI) is the ratio of pulsatile blood flow (arterial chamber) to non-pulsatile static blood flow (venous and capillaries) in a patient's peripheral tissue, such as the fingertip, toe, or earlobe. This can be obtained from a pulse oximeter. This is non-invasive and continuous monitoring. The pulse variability index (PVI) represents changes in PI that occur during one or more complete respiratory cycles. PVI is found by calculating over PI changes. Allows evaluation of intravascular volume; and a higher PVI is associated with greater responsiveness to fluid volumes. In our work; We will simultaneously observe PI and PVI changes in the lower and upper extremities in the study group patients. When we look at the previous studies; we see that the parameters (PI and PVI) that we will look at are evaluated with different combinations in our study group patients. When we look at these studies again; We saw that contradictory results were obtained for the same parameters. In our study, patients will be verbally informed in detail about the study in the preoperative period and their consent will be obtained. While the patients are taken to the operating room and monitored, the saturation probe will be connected to the 2nd finger of the upper and lower extremities of the patients, and the PI and PVI values in both extremities will be measured simultaneously. PI and PVI values and vital values (SAB, MAP, HR, SPO2) in both extremities before spinal anesthesia; intraoperative SAP, MAP, HR, SPO2, ephedrine requirement, atropine requirement and PI and PVI values in both extremities will be recorded. As a result; In our study, we aimed to observe simultaneous changes in PI and PVI in the lower and upper extremities in pregnant patients who will undergo cesarean section under spinal anesthesia, which is our study group.
The investigators' goal is to perform an observational cohort study investigating the use of oxygen reserve index (ORi) in patients undergoing elective thoracic surgery and one-lung ventilation (OLV). For this purpose, ORi values are recorded and compared to the other collected hemodynamical and oximeter parameters. The primary hemodynamic parameters include heart rate (HR) and blood pressure (BP), while; oximeter device-related parameters include peripheral oxygen saturation, perfusion index (PI), and pleth variability index (PVI). The investigators' secondary goal is to investigate relationships between these hemodynamical and oximeter parameters using statistical analysis methods.
The infraclavicular nerve block, which is frequently preferred in upper extremity surgeries, provides additional advantages such as reduction in opioid consumption by providing analgesic effect in the postoperative period as welll. The success of peripheral nerve blocks is usually assessed by subjective feedback from the patient, and patient cooperation is needed. The aim of this study is to assess whether the perfusion index level, which can be measured noninvasively, can be a predictor of the infraclavicular block success.
To compare the two different approaches of infraclavicular brachial plexus block in forearm, wrist and hand surgery in terms of perfusion index, tissue oxygenation, sensory and motor block onset time and total effect time, first analgesic time, side effects and complications, and duration of block application.
The purpose of our study is to test the usability of the perfusion index in evaluating the success of the peripheral nerve block applied under sedation in children.
Spinal anesthesia for caesarean section is associated with a decrease in systemic vascular resistance and cardiac output and may cause hypotension in a significant portion of the parturients. Hypotension during delivery may cause maternal and fetal complications. If parturients who are likely to develop hypotension after spinal anesthesia can be identified before surgery, anesthesiologists would have opportunity to take measures such as prophylactic vasopressor administration. Perfusion index (PI) measured by pulse oximetry reflects vasomotor tone which affects the degree of hypotension after spinal anesthesia. This is a non-invasive method of assessing the relative vascular tone with the use of pulse oximeter which calculates the ratio of pulsatile versus the non-pulsatile component of the blood flow. A lower PI indicates greater peripheral vasomotor tone. Pleth variability index (PVI) is calculated using maximum and minimum values of perfusion index during respiratory cycles. PVI is one of the dynamic indices that can predict fluid responsiveness. There are several studies investigating the predictive value of finger PI and PVI on hypotension after spinal anesthesia. However the aortocaval compression by the gravid uterus directly effects the lower extremity perfusion. So, in this study we aimed to investigate whether the right toe PI and PVI values at supine and left lateral positions can predict hypotension during caesarean section.
Spinal anesthesia for caesarean section is associated with a decrease in systemic vascular resistance and cardiac output and may cause hypotension in a significant portion of the parturients. Hypotension during delivery may cause maternal and fetal complications. If parturients who are likely to develop hypotension after spinal anesthesia can be identified before surgery, anesthesiologists would have opportunity to take measures such as prophylactic vasopressor administration. Perfusion index (PI) measured by pulse oximetry reflects vasomotor tone which affects the degree of hypotension after spinal anesthesia. This is a non-invasive method of assessing the relative vascular tone with the use of pulse oximeter which calculates the ratio of pulsatile versus the non-pulsatile component of the blood flow. A lower PI indicates greater peripheral vasomotor tone. Pleth variability index (PVI) is calculated using maximum and minimum values of perfusion index during respiratory cycles. PVI is one of the dynamic indices that can predict fluid responsiveness. The aim of this study is to investigate whether the PI and PVI values at different patient positions can predict hypotension during caesarean section.