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PubMed2005

Long-term comparative results of C0 and C2 monitoring of CyA in renal transplanted patients.

The purpose of this study was to evaluate the effects of CyA monitoring using C0 monitoring (fasting level after 12 h from last dose), and C2 monitoring (2 h after morning dose) on renal functions, lipid levels, CyA levels, and daily dosages of CyA in renal transplanted patients in the posttransplant period from the first month to the 36th month. In our center between 1992-2003, 37 of the 54 renal transplanted patients were treated with CyA, prednisolone, and mycophenolate mofetil or azathioprine. The mean age was 32.36 +/-10.32 and 35.00 +/- 10.23 (p = 0.39) in C0 (M/F: 18/7) and in C2 (9/3), respectively. Cadaveric donor (d), living related d, and living unrelated d were in four patients (p), 17 p and four p in C0, and two p, seven p, and three p in C2, respectively (p = 0.79). Chronic allograft nephropathy (CAN) developed in 13 p (52%) and one p (8.3%) in C0 and in C2, respectively (p =0.013). Creatinine clearance values were 72.31 +/- 23.10 mL/min and 78.73 +/- 22.42 mL/min (p:0.621) at first month, 64.97 +/- 22.58 mL/min and 78.00 +/- 19.90 mL/min (p:0.065) at sixth month, 56.50 +/- 19.62 mL/min and 76.62 +/- 21.06 mL/min (p:0.006) at 12th month, 50.28 +/- 24.79 mL/min and 80.87 +/- 18.24 mL/min (p < 0.001) at 24th month, and 55.15 +/- 19.21 mL/min and 86.65 +/- 14.97 mL/min (p:0.004) at 36th month in C0 and C2, respectively. The mean daily dosages of CyA were 354.35 +/- 122.63 and 266.67 +/- 64.95 mg/d (p:0.031) at first month, 277.17 +/- 77.94 and 250.00 +/- 73.31 mg/d (p:0.228) at sixth month, 247.92 +/- 58.48 and 211.36 +/- 62.61 mg/ d (p:0.09) at 12th month, 232.95 +/- 56.90 and 170.45 +/- 41.56 mg/ d (p:0.003) at 24th month, and 240.63 +/- 52.34 and 153.57 +/- 46.61 mg/d (p:0.002) at 36th month in C0 and C2, respectively. In C2, systolic and diastolic blood pressure, uric acid, total cholesterol (C), LDL-C, and triglyceride levels were lower than those monitored with C0. In C2, HDL-C levels were also higher than those monitored with C0. None of these patients returned to dialysis or died in this period. In conclusion, during the first 36 months with monitoring C2, preservation of renal function, control of blood pressure serum lipids and uric acid were better than those with monitoring C0. In addition, daily dose of CyA was lower in C2 method and, at the same time, this effect of C2 can be accepted as cost effective.

Adult↗
PubMed1991

Ambulatory blood pressure monitoring and the primary care physician.

The primary care physician welcomes technology that will reduce overlabelling and overtreatment of hypertension. Three concerns with respect to ambulatory blood pressure monitoring are: the clear identification of those patients who will benefit from monitoring; the potential for labelling patients prematurely as having technical abnormalities (i.e., 'hypervariability'), which may have little clinical significance; and the inaccessibility of ambulatory monitoring. To determine patient acceptance of ambulatory monitoring, a follow-up survey of 37 patients who used the Spacelab 5200 device was conducted. Twenty-four percent said they would not be agreeable to further monitoring. While newer devices may be less disruptive, the point is made that it is important to include patient assessments in the evaluation of these devices. A comparison is undertaken between ambulatory monitors and the more accessible self-monitoring devices which involve the patient to a greater degree in his/her own care.

Blood Pressure Determination↗
PubMed1995

Intraoperative and postoperative physiological monitoring practices by pediatric dentists.

The medical and dental literature has described successful sedations and those which have resulted in injury and death. Physiologic monitoring of patients is essential in assuring the success and safety of sedations in the dental office. The purpose of this study was to investigate the utilization and preferences of various physiologic monitoring methods and utilization of dentist anesthesiologists by pediatric dentists during sedations. Pediatric dentists in California were surveyed [n = 261] regarding monitoring methods in five different case scenarios. The most frequently utilized methods were clinical observation, pulse oximeter, and precordial stethoscope. Eighty seven percent of the pediatric dentists who use sedation do so without the involvement of a dentist anesthesiologist. Eighteen percent of pediatric dentists do not use any sedative agents in their practice. In the five case scenarios described in the survey, clinical observation was the most frequently utilized monitoring method during intra- and postoperative periods, followed by the pulse oximeter and precordial stethoscope. Intra- and postoperative monitoring varied with the complexity of the case scenario and most respondents monitored continuously. The trends observed from this study indicate that recent graduates use more sedative agents and find the pulse oximeter to be useful for physiologic monitoring during sedation.

Adolescent↗
PubMed2006

Improved therapeutic monitoring with several interventions: a randomized trial.

BACKGROUND: Medication errors are frequently related to failure to appropriately select medications or adjust for laboratory parameters. Differences between guideline recommendations and actual frequency of therapeutic laboratory monitoring are substantial. This study evaluated interventions to improve laboratory monitoring at initiation of medication therapy. METHODS: This cluster-randomized trial compared 3 interventions to usual care for 10 medications in 15 primary care clinics in a health maintenance organization with an electronic medical record system. Eligible patients, identified from electronic databases, had not received recommended laboratory monitoring within 5 days after new dispensing of a study medication. Interventions were an electronic medical record reminder to the prescribing health care professional, an automated voice message to the patient, and a pharmacy team outreach to the patient. Primary outcome was completion of all recommended baseline laboratory monitoring. RESULTS: A total of 961 patients participated in the study. At 25 days, 95 (48.5%) of 196 patients in the electronic medical record reminder group, 177 (66.3%) of 267 in the automated voice message group, 214 (82.0%) of 261 in the pharmacy team outreach group, and 53 (22.4%) of 237 in the usual care group had completed all recommended baseline laboratory monitoring (P<.001). After adjustments, the hazard ratios for completing laboratory monitoring compared with usual care were 2.5 (95% confidence interval, 1.8-3.5) for electronic medical record reminder, 4.1 (95% confidence interval, 3.0-5.6) for automated voice message, and 6.7 (95% confidence interval, 4.9-9.0) for pharmacy team outreach. CONCLUSIONS: All 3 interventions were effective in increasing laboratory monitoring when initiating new medications in primary care. Further work is necessary to determine if these interventions improve patient outcomes.

Adult↗
PubMed1988

Mothers of preterm and full-term infants on home apnea monitors.

We prospectively studied the stress perception of ten mothers of preterm infants on apnea monitors (birth weight, 1255 +/- 295 g) and ten mothers of term infants on monitors (3156 +/- 700 g) and compared them with 15 mothers of preterm infants (1450 +/- 305 g) and 15 mothers of term infants (3360 +/- 595 g) not on monitors. The Life Experience Survey, a stress assessment questionnaire, and the social support questionnaire of Henderson were administered to the 50 mothers. Stress perception scores were higher for mothers of infants on monitors than for mothers of infants not on monitors. Regression analyses indicated that mothers of infants on monitors experienced less perceived stress when they received greater support. Mothers of infants on monitors who experienced less stress reported greater general life satisfaction and greater satisfaction with parenting.

Adult↗
PubMed1999

An evolving role of transesophageal echocardiography for the monitoring of interventional catheterization in children.

BACKGROUND AND HYPOTHESIS: Transesophageal echocardiography (TEE) is increasingly utilized for the monitoring of interventional cardiac catheterization in children. The initial nondiscriminant use is giving way to a more selective approach. The current role and usefulness of this imaging modality are described. METHODS: Between 1991 and 1995, 44 patients (mean age 7.4 +/- 5 years, weight 22.8 +/- 14.2 kg) underwent interventional cardiac catheterizations performed under TEE monitoring. The interventional procedures included (1) those involving creation, enlargement, or closure of an interatrial communication; (2) balloon dilatation of stenotic lesions; and (3) occlusion of arterial ducts. Transesophageal echocardiographic monitoring was judged to be either of great value, contributory, or of little use if the interventional procedure and choice of instrument relied heavily upon, was guided, or not affected by the information obtained from the ultrasonic investigation, respectively. RESULTS: Transesophageal echocardiography was judged to be of great value in the monitoring of 18 (40%) procedures involving either the creation, enlargement, or closure of interatrial communications. This included 4 transseptal punctures, 4 blade septectomies for relieving restrictive atrial septal defects (n = 3) and an enlargement of the communication between the superior and inferior chambers of the divided left atrium in cortriatriatum, and 11 closures of a secundum atrial septal defect. Only the ultrasonic monitoring could clearly visualize the interatrial partition to provide real-time guidance on the positioning of the instrument to carry out the invasive procedures. Transesophageal echocardiography provided clear images of the hinge points of the aortic and mitral valves, the dimension of the narrowed pulmonary venous pathway in patients after venous switch operation. This facilitated the choice of the correct size of the balloon for dilatation in 11 patients (24%) and provided immediate postdilatation hemodynamic assessment. As for balloon dilation of subvalvar ventricular outflow tract obstruction (n = 3), aortic coarctation (n = 6), and occlusion of persistent arterial duct (n = 7), TEE offered no obvious advantage over fluoroscopy with angiography. The monitoring was judged to be of little value for the 16 (36%) procedures. CONCLUSION: Transesophageal echocardiographic monitoring is of great value in interventional procedures involving the atrial septum and enhances interventional procedures involving obstructive lesions of the left heart in children.

Cardiac Catheterization↗
PubMed1981

Transcutaneous PO2 monitoring for assessing viability and predicting survival of skin flaps: experimental and clinical correlations.

Rectangular skin flaps based on the right superficial epigastric vessels were designed on the groins of 36 rats. Preoperative control, intraoperative, and postoperative readings of oxygen tension (PO2) were made at proximal, central, and distal sites on the flaps with a transcutaneous PO2 (tcPO2) monitor under various conditions of oxygen inspiration. The results of this experimental work indicated that the tcPO2 monitor was useful in continuously and rapidly measuring changes in oxygen concentration in skin flaps in a noninvasive fashion. The monitoring demonstrated that the response time of the flaps to changes in the concentration of inspired oxygen was rapid (less than 15 seconds). The monitoring also was valuable in assessing viability of the flaps, in predicting flap survival, and in detecting any systemic factors influencing oxygen transport, such as pneumonia. As a result of the experimental series, tcPO2 monitoring was used clinically to evaluate 18 flaps in 16 patients. As in the experimental series, the clinical measurements were significant and reproducible. They demonstrated that the tcPO2 monitor provides safe, reliable monitoring of peripheral oxygenation in the microcirculation that is rapid, continuous, and totally noninvasive. It is concluded that simultaneous tcPO2 measurements at control and flap sites provides a continuous record of the status of a flap that can improve the postoperative management of the surgical patient.

Animals↗
PubMed2003

Pilot study of objective cough monitoring in infants.

Cough is common in childhood, resulting in significant morbidity and frequent medical consultation. Despite this, little is known about the frequency or development of cough, particularly in infants and young children. Recent progress in monitoring has enabled cough to be measured objectively both day and night. However, to date, objective measurement has only been used in adults and older children. The aim of this study was to see whether such methods could be extended to allow objective cough monitoring in infants. Thirty infants were recruited: 13 with coughing illnesses (group 1), and 17 normal, healthy babies (group 2) born to nonatopic, nonsmoking parents. Group 2 infants were studied when well, several times in the first year of life. Coughs were recorded using an adapted commercial cough monitor (Logan Research LR100) and simultaneous infrared video and sound recording. Thirty-eight recordings with simultaneous cough monitor and video data were analyzed: 9 from group 1, and 29 from group 2. Overall, the sensitivity of the monitor when compared to video was 81%, with a positive predictive value of 0.8. There was good agreement between the two methods for infants with infrequent cough (<5 coughs per hour). Agreement in infants with more frequent cough was not as good, because more coughs were consistently identified by the cough monitor. The portability and small size of the cough monitor made it easy to use, although there were difficulties in keeping the leads attached in older, more mobile infants. In conclusion, objective assessment of cough is practical in infants, enabling the pattern of cough in illness and in health to be studied further.

Age Factors↗
PubMedDate not supplied

Observations on the limitations of two apnea/respiration monitors commonly used in the home.

The performance of two types of respiration monitor was studied with regard to detection of central apnea and individual breaths. Each monitor detected central apnea more frequently than routine intermittent nursing observation. Both false alarms, when the monitor failed to detect breathing movements (false positive for apnea), and false respiration signals, when the monitor failed to detect the absence of breathing movements (false negative for apnea) were found. The latter sometimes prevented alarms. It was found that a trial period of monitoring under the controlled conditions described permitted adjustments to be made which eliminated or minimized these sources of error. This should be considered when the monitors are issued for use in the home. It is important that persons issuing the monitors be aware of their limitations.

Apnea↗
PubMed1993

Data monitoring and interim analyses in the pharmaceutical industry: ethical and logistical considerations.

The characteristics of data monitoring and the need for the use of data monitoring committees in clinical trials sponsored by the pharmaceutical industry differ from those of trials sponsored by government. Data monitoring is a continuous process in industry trials due to the regulatory requirements and the need to more thoroughly evaluate safety of new compounds. As part of this process, interim analyses are employed to make decisions about treatment effects. In some cases, such analyses may require the use of an external data monitoring committee to assist in the data review, analysis and decision making. A number of examples of interim analyses, with and without data monitoring committees, are discussed. Issues surrounding the need for external data monitoring committees and recommendations are presented. In particular the issues of sponsor participation in the data monitoring committee and controls of the decision making process are considered.

Clinical Trials Data Monitoring Committees↗
PubMed2001

A quantitative evaluation of monitoring networks for region-specific nitrate reduction policies.

Modern environmental policy implementation in many developed countries is increasingly regionally oriented. Regional governments have undertaken measures designed for the specific needs of the region but, so far, the resulting change in environmental quality has hardly been monitored. This study develops a method for the quantitative evaluation of region-specific environmental policy. Two forms of monitoring are distinguished: monitoring of performance of policy measures and monitoring of environmental quality. This study investigates two regions in the Netherlands where region-specific policy has been implemented. Performance monitoring focused on reduction of nitrate leaching to groundwater. Leaching reductions were calculated with simple models or rules of thumb. Quality monitoring focused on nitrate concentrations under grassland and other land use. An analysis of variance showed significant differences between different soil units. Stratified kriging was applied for spatial interpolation, showing within-unit variability. The current monitoring network could be improved by using a more regular type of grid.

Data Interpretation, Statistical↗
PubMed1996

Assessment of gastric acidity in intensive care patients: intermittent pH registration cannot replace continuous pH monitoring.

OBJECTIVE: To test the accuracy of colour-scaled indicator papers to measure pH values and to study the correlation between this method of measuring gastric juice pH once daily and 24-h continuous intragastric pH monitoring in intensive care patients. DESIGN: The accuracy of indicator papers was tested in the laboratory using colourless solutions and aspirated gastric juice and was then verified with a laboratory pH meter. Continuous intragastric pH monitoring was performed in mechanically ventilated ICU patients. Percentages of time with a pH value <3.0 and median pH values by 24-h continuous intragastric pH monitoring were compared to pH values measured once daily with indicator paper. SETTING: A mixed ICU. PATIENTS: A total of 150 measurements were taken by continuous pH monitoring in 91 mechanically ventilated ICU patients. MEASUREMENTS AND RESULTS: The correlation between the pH measured with the indicator paper and subsequently verified with a laboratory pH meter in colourless solutions was 0.96 [regression coefficient (RC) 0.98, 95% confidence interval (CI) 0.91-1.05]. Measured in gastric juice it was 0.95 (RC 0.95, 95% CI 0.88-1.01). The correlation between median pH values, determined with 24-h continuous intragastric pH monitoring, and values measured with indicator papers was 0.39 (RC 0.43, 95% CI 0.26-0.59). The mean difference in pH, as determined by the analysis of Bland and Altman], was 0.9 with a SD of 4.7. The correlation between the percentage of time with pH < 3.0, as obtained with continuous registration, and median gastric pH values (also obtained with continuous registration) was -0.94 (RC-0.06, 95% CI-0.06- -0.05); the correlation between the time and gastric pH values (measured with indicator paper) was-0.40 (RC-0.02, 95% CI-0.03- -0.02). CONCLUSION: The colour-scaled indicator paper is an accurate method of measuring pH values, but there is a poor correlation between gastric pH values measured once daily and a total measurement derived from 24-h continuous intragastric pH monitoring. Changes in intragastric pH values cannot be accurately studied when measuring acidity once daily. The influence of various treatment regimens on intragastric acidity in relation to the development of gastric colonization and nosocomial pneumonia should be investigated either with continuous intragastric monitoring or with frequent measurements in aspirated gastric juice.

Adult↗
PubMed1990

Multimicroprocessor system for online monitoring in a CCU.

A real-time monitoring system for physiological signals, developed for patients in coronary care units (CCUs), is described. This system monitors the signals that have the greatest clinical value in a CCU environment (ECG and cardiovascular pressures), taking charge of detecting dangerous situations and of extracting information significant to the correct monitoring of the patient. The information it extracts, mainly from the ECG, is presented to the user in an ergonomic way using written reports and graphs which collect and compile the information, facilitating its interpretation. Some utilities have been developed to allow the user to modify certain monitoring conditions as well as to correct results derived from them, thereby improving the reliability of the monitoring process. The system uses a multimicroprocessor architecture (imposed by the need to perform a large number of tasks in real time) with a block based on the VME bus, charged with acquiring and processing the monitored signals, and an IBM-compatible PC/XT which is used as a system user interface and a massive storage device in which the information resulting from the monitoring of signals is stored.

Coronary Care Units↗
PubMed1990

A unified approach to providing general anaesthesia monitoring with special reference to developing countries.

Information concerning general anaesthesia, monitoring and ergonomics has been assembled to present a plan for the introduction of necessary monitors into a department of anaesthesia. This includes reference to: (i) The need for instrumental monitors; (ii) Division of tasks between anaesthetist and monitor; (iii) User education; (iv) Anaesthetist/monitor interface; (v) Hospital infrastructure. Emphasis is placed on the continued need for anaesthetists to employ their own senses for monitoring in the traditional manner and the essential role instrumental monitors should play in helping trainees to refine and calibrate their clinical skills. It is suggested that in situations where neither mechanical ventilators are available nor instrumental monitors necessary to refine the conduct of general anaesthesia a transitional stage in evolution could be the presence of two persons with clearly defined responsibilities for all the anaesthesia tasks necessary during a safely conducted case.

Anesthesia Department, Hospital↗
PubMed2003

[Reliability of home monitoring with event-recording compared with polysomnography in infants].

AIM OF THE STUDY: Although reliable recognition of hypoxemia, apnea, bradycardia and tachycardia is absolutely necessary for home monitoring, many commercially available home monitors have not been sufficiently tested for their sensitivity. The purpose of this study was to determine the reliability of the home monitor VitaGuard 3000 by comparing it with the manual evaluation of full polysomnography (polysomnographic system Alice 3). PATIENT AND METHODS: 20 infants (11 males; 9 females) aged between 5 and 40 weeks (12.2 +/- 3.5 weeks, median 10.5) and with a gestational age between 29 and 41 weeks (37.7 +/- 6.1 weeks, median 39.0) were tested using both full polysomnography and, simultaneously, the home monitor VitaGuard 3000. The results were evaluated manually and compared. RESULTS: The monitor system detected 7/51 central apneas, 6/260 desaturations and 7/18 tachycardias. The sensitivity was 13.72% for apnea, 4.23% for desaturation and 38.80% for tachycardia. The reliability of the home monitor for detecting apnea, desaturation and tachycardia was therefore insufficient. CONCLUSION: A polysomnographic reliability test should be mandatory for all home monitoring systems prior to commercial introduction.

Age Factors↗
PubMed2006

Intracranial pressure complicating severe traumatic brain injury in children: monitoring and management.

OBJECTIVE: To identify factors associated with the use of intracranial pressure (ICP) monitoring and to establish which ICP-targetted therapies are being used in children with severe traumatic brain injury (TBI) in the United Kingdom. To evaluate current practice against recently published guidelines. DESIGN AND SETTING: Prospective data collection of clinical and demographic information from paediatric and adult intensive care units in the UK and Ireland admitting children (< 16 years) with TBI between February 2001 and August 2003. RESULTS: Detailed clinical information was obtained for 501 children, with information on the use of ICP monitoring available in 445. ICP monitoring was used in only 59% (75/127) of children presenting with an emergency room Glasgow Coma Scale of 8 or below. Large between centre variation was seen in the use of ICP monitoring, independent of severity of injury. There were 86 children who received ICP-targetted therapies without ICP monitoring. Wide between centre variation was found in the use of ICP-targetted therapies and in general aspects of management, such as fluid restriction, the use of muscle relaxants and prophylactic anticonvulsants. Intra-ventricular catheters are rarely placed (6% of cases); therefore cerebrospinal fluid drainage is seldom used as a first-line therapy for raised ICP. Jugular venous bulb oximetry (4%), brain microdialysis (< 1%) and brain tissue oxygen monitoring (< 1%) are rarely used in current practice. Contrary to published guidelines, moderate to severe hyperventilation is being used without monitoring for cerebral ischaemia. CONCLUSIONS: There is an urgent need for greater standardisation of practice across UK centres admitting children with severe TBI.

Adolescent↗
PubMed1999

Early SjvO2 monitoring in patients with severe brain trauma.

OBJECTIVE: To investigate early cerebral variables after minimal resuscitation and to compare the adequacy of a cerebral perfusion pressure (CPP) guideline above 70 mmHg, with jugular bulb venous oxygen saturation (SjvO2) monitoring in a patient with traumatic brain injury (TBI). DESIGN: Prospective, observational study. SETTING: Anesthesiological intensive care unit. PATIENTS: 27 TBI patients with a postresuscitation Glasgow Coma Scale score less than 8. INTERVENTION: After initial resuscitation, cerebral monitoring was performed and CPP increased to 70 mmHg by an increase in mean arterial pressure (MAP) with volume expansion and vasopressors as needed. MEASUREMENTS AND RESULTS: MAP, intracranial pressure (ICP), CPP, and simultaneous arterial and venous blood gases were measured at baseline and after treatment. Before treatment, 37% of patients had an SjvO2 below 55%, and SjvO2 was significantly correlated with CPP (r = 0.73, p < 0.0001). After treatment, we observed a significant increase (p < 0.0001) in CPP (78+/-10 vs 53+/-15 mmHg), MAP (103+/-10 vs 79+/-9 mmHg) and SvjO2 (72+/-7 vs 56+/-12), without a significant change in ICP (25+/-14 vs 25+/-11 mmHg). CONCLUSION: The present study shows that early cerebral monitoring with SjvO2 is critical to assess cerebral ischemic risk and that MAP monitoring alone is not sensitive enough to determine the state of oxygenation of the brain. SjvO2 monitoring permits the early identification of patients with low CPP and high risk of cerebral ischemia. In emergency situations it can be used alone when ICP monitoring is contraindicated or not readily available. However, ICP monitoring gives complementary information necessary to adapt treatment.

Adolescent↗
PubMed2006

Multicriteria relocation analysis of an off-site radioactive monitoring network for a nuclear power plant.

Due to increasing environmental consciousness in most countries, every utility that owns a commercial nuclear power plant has been required to have both an on-site and off-site emergency response plan since the 1980s. A radiation monitoring network, viewed as part of the emergency response plan, can provide information regarding the radiation dosage emitted from a nuclear power plant in a regular operational period and/or abnormal measurements in an emergency event. Such monitoring information might help field operators and decision-makers to provide accurate responses or make decisions to protect the public health and safety. This study aims to conduct an integrated simulation and optimization analysis looking for the relocation strategy of a long-term regular off-site monitoring network at a nuclear power plant. The planning goal is to downsize the current monitoring network but maintain its monitoring capacity as much as possible. The monitoring sensors considered in this study include the thermoluminescence dosimetry (TLD) and air sampling system (AP) simultaneously. It is designed for detecting the radionuclide accumulative concentration, the frequency of violation, and the possible population affected by a long-term impact in the surrounding area regularly while it can also be used in an accidental release event. With the aid of the calibrated Industrial Source Complex-Plume Rise Model Enhancements (ISC-PRIME) simulation model to track down the possible radionuclide diffusion, dispersion, transport, and transformation process in the atmospheric environment, a multiobjective evaluation process can be applied to achieve the screening of monitoring stations for the nuclear power plant located at Hengchun Peninsula, South Taiwan. To account for multiple objectives, this study calculated preference weights to linearly combine objective functions leading to decision-making with exposure assessment in an optimization context. Final suggestions should be useful for narrowing the set of scenarios that decision-makers need to consider in this relocation process.

Environmental Monitoring↗