View clinical trials related to Hypercapnia.
Filter by:Nasal High Oxygen Flow (HOF) has been demonstrated to reduce the re-intubation rate in hypoxic patients and ameliorate breathing pattern in hypercapnic patients. The aim of this study is to better understand the physiological mechanism underlying these results, assessing the respiratory mechanics in stable hypercapnic COPD patients.
Opioids are an effective instrument for patients with acute and chronic pain. Their route of administration ranges from transdermal to subcutaneous application through to Intravenous Patient-Controlled Analgesia (IV-PCA). The use of IV-PCA-pumps has considerable advantages including decreased delay in the administration of opioids from the time requested, individual dose intervals, self -control of their therapy, rapidity and ease of dose titration . These potential benefits, however are balanced by the need for careful assessment of adverse effects, including decreased quality of life because of the patient's sedation, constipation and possible episodes of bradypnoea and desaturation, eventually leading to respiratory depression (RD) requiring treatment. Often described safety features that help prevent overdosing are PCA bolus dose, delay, and lockout interval. Even though the risk of serious, potentially life threatening complications by using IV-PCA without a background infusion was described to be very low (0.24%) compared to other methods of opioid delivery , adverse effects like worrying degrees of hypoxemia and bradypnoea do occur and often remain undetected due to the lack of continuous monitoring. One of the possible causes of patient harm are medication errors associated with PCA administration, a common form of PCA errors, which is a significant source of preventable patient morbidity and hospital resource utilization. The individual patient response to a particular dose of opioids depends on diagnosed or unrecognized comorbidities. Clinical experience has shown that it is not possible to prospectively identify all patients who may be at increased risk. Conventional opioid monitoring protocol may fail to detect frequent episodes of bradypnoea and desaturation measured by the respiratory rate (RR) and Saturation of Peripheral Oxygen (SpO2) because even at a low respiratory rate SpO2 is usually maintained, so that pulse oxymetry might fail to detect respiratory deterioration, particularly if a patient is receiving supplemental oxygen. Therefore, continuous monitoring could be considered more sensitive, especially if it contains the measurement of Partial Pressure of Carbon dioxide (PCO2), which is a good parameter for monitoring ventilatory function. The 'gold standard' method to measure the arterial partial pressure of carbon dioxide (PaCO2) is still the arterial blood gas analysis. But arterial sampling including catheterization or intermittent arterial puncture is invasive and expensive and associated with pain and discomfort for the patient. Therefore cutaneous carbon dioxide tension (PcCO2) measurement was suggested to be used as a non-invasive surrogate measure of PaCO2. SpO2, and tcPCO2, are important clinical parameters that should be used in conjunction with each other. SpO2 reflects oxygenation, while tcPCO2 reflects ventilation; the first can still be normal while the second may herald early changes in respiratory status. Capnography may provide the earliest indication of opioid-induced respiratory depression. It is important to monitor changes from a baseline tcPCO2 level. As the tcPCO2 level starts to increase, early intervention and changes in medication can be made. The present study aims to examine combined oxymetry and transcutaneous capnography using a single earlobe sensor (V-Sign™, Sentec AG, Therwil, Switzerland) in chronic pain patients treated with opioids where non-invasive monitoring of ventilation is needed because ventilatory disturbances are suspected. This may, potentially, improve patient's quality of life.
15 COPD patients will be surveyed in this prospective randomized crossover pilot study concerning non invasive ventilation. Patients will be treated over 2 nights in randomized order with Ventimotion2 (Weinmann) with and without Airtrap Control under Polysomnography (PSG) surveillance including transcutaneous pCO2 measurement. The sleep quality is judged by evaluating the PSG and pCO2 values over night. Target parameters are respiratory rate, sleep quality and influence of Airtrap Control on pCO2 values over night.
Aim of this prospective randomized trial is to compare non invasive ventilation (NIV) with pressure control (BiPAP-ST) to volume assured pressure support (iVAPS) with regards to sleep quality and alveolar ventilation in patients with routine NIV initiation after COPD exacerbation. 20 patients with COPD and chronic hypercapnic respiratory failure will spent two nights on NIV, one with spontaneous timed pressure controlled bilevel ventilation (BiPAP-ST) and one with the advanced mode of intelligent volume assured pressure support (iVAPS). Patients will spend the treatment nights in randomized order under polysomnographic surveillance, including transcutaneous PCO2 measurement. Besides the number of arousals and PCO2 values over night the sleep quality will be judged with regards to especially adjusted respiratory event criteria like unintentional leaks, patient ventilator asynchrony, and decrease of ventilatory drive.
The aim of this study is to describe the pulmonary hemodynamic evolution at rest and during a short constant load exercise in 4 conditions : - normoxia - hypoxia - hypercapnia - association hypoxia and hypercapnia
- Patients with spinal cord injury (SCI) usually breathe without any mechanical assistance, but significant breathing problems occur often during sleep, either because the upper airway closes (obstructive sleep apnea; OSA), or because of weakness/paralysis of the breathing muscles. These problems often go unrecognized, as SCI patients face logistical barriers that cause them to refuse appropriate testing in sleep laboratories. We have devised a strategy for diagnosing sleep-disordered breathing in the patient's home, using placement of noninvasive devices that monitor breathing overnight. This project is designed to test the feasibility and utility of this strategy. - After collecting baseline data on symptoms and medical events for four months, the home-based studies are performed noninvasively with FDA-approved devices: a type III sleep system and a recording oxygen saturation/ transcutaneous carbon dioxide monitor. If these studies identify sleep-disordered breathing, noninvasive ventilatory support is prescribed according to standard clinical practice. Over the following twelve months, the subjects monitor their symptoms daily, and answer quality-of-life questionnaires every three months. After 3, 6, and 12 months, blood tests are performed to measure blood sugar and cholesterol/lipids. Data is downloaded from the ventilator device to monitor compliance and ventilator performance. This study is designed to determine the prevalence of sleep-disordered breathing in SCI, the feasibility of home-based testing to establish the diagnosis, and the short term effects on symptoms, quality-of-life, and associated conditions (glucose intolerance, blood lipid disorders).
The overall aim with this project is to investigate the effect of dexmedetomidine on control of breathing in healthy volunteers and to compare it with propofol at the same degree of sedation.
In patients suffering from hypercapnic respiratory failure and treated by non invasive ventilation (NIV), the interest of using transcutaneous CO2 measurement to evaluate PaCO2 and PaCO2 variation over time is unknown and will be evaluated in this study. Measurements will be done during one-hour NIV treatments.
The investigators tested the hypothesis that alveolar recruitment maneuver during cesarean section and in women under general anesthesia improves lung compliance and gas exchange. The investigators applied recruitment maneuver and positive end expiratory pressure (PEEP) 8 cmH2O. The maximum alveolar pressure limit (Ppeak)was 45 cmH2O during the recruitment maneuver. The primary end point of the study is the improvement of the lung compliance measured as volume difference/pressure difference (dv/dp) or ml/cmH2O
Use of trancutaneous CO2 (TC02) monitoring to aide in titration of sedation of midazolam and fentanyl. Trancutaneous readings validated with invasively obtained specimens from existing arterial sheaths required during AF and VT ablations (trans-septal and retrograde aortic respectively)