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Summary recommendations 1-5 and 7 should be implemented in every hospital where operations are performed on inpatients. The Acute Pain Management Guideline Panel recommends that any hospital in which abdominal or thoracic operations are routinely performed offer patients postoperative regional anesthetic, epidural or intrathecal opioids, PCA infusions, and other interventions requiring a similar level of expertise, under the supervision of an acute pain service as described in summary recommendation 6. For pain management to be effective, each hospital must designate who or which department will be responsible for all of the required activities. There are a number of alternative approaches to preventing or relieving postoperative pain, many of which can give good results if attentively applied. The following elements, however, apply to most cases and might serve as a focus for assessing the results of these guidelines: 1. Promise patients attentive analgesic care. Patients should be informed before surgery, orally and in printed format, that effective pain relief is an important part of their treatment, that talking about unrelieved pain is essential, and that health professionals will respond quickly to their reports of pain. It should be made clear to patients and families, however, that the total absence of any postoperative discomfort is normally not a realistic or even a desirable goal. 2. Chart and display assessment of pain and relief. A simple assessment of pain intensity and pain relief should be recorded on the bedside vital sign chart or a similar record that encourages easy, regular review by members of the health care team and is incorporated in the patient's permanent record. The intensity of pain should be assessed and documented at regular intervals (depending on the severity of pain) and with each new report of pain. The degree of pain relief should be determined after each pain management intervention, once a sufficient time has elapsed for the treatment to reach peak effect. A simple, valid measure of intensity and relief should be selected by each clinical unit. For children, age-appropriate measures should be used. 3. Define pain and relief levels to trigger a review. Each institution should identify pain intensity and pain relief levels that will elicit a review of the current pain therapy, documentation of the proposed modifications in treatment, and subsequent review of its efficacy. This process of treatment review and follow-up should include participation by physicians and nurses involved in the patient's care.(ABSTRACT TRUNCATED AT 400 WORDS)
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PMID:Acute pain management: operative or medical procedures and trauma, Part 2. Agency for Health Care Policy and Research. 158 31

The authors report a prospective study of the first 51 cementless P.C.A. unicompartmental arthroplasties performed for osteoarthritis of the knee by one surgeon. Forty-two medial prostheses in 38 patients and 9 lateral prostheses in 9 patients were reviewed at a minimum of 2 years after surgery. Patients were assessed using the HSS score. In the medial joint replacement group, 37 (88%) had an excellent or good result, 3 (7%) were fair, and 2 (5%) poor. Subjectively 37 (88%) were good, 2 (5%) were fair, and 3 (7%) had a poor result. All of the lateral joint replacements had an excellent or good result. This improvement was due to pain relief and increased functional ability; preoperative range of movement was maintained or only slightly improved. There were five unsatisfactory results, three due to technical errors (one requiring revision), one a failure of patient selection, and the last an unexplained synovitis causing persistent discomfort. The early results for the cementless PCA unicompartmental knee arthroplasty are encouraging, with a satisfactory result in 90% of patients.
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PMID:Cementless PCA unicompartmental joint arthroplasty for osteoarthritis of the knee. A prospective study of 51 cases. 235 14

In this pilot randomized, double-blind, cross-over study, the effectiveness and safety of hydromorphone administration by continuous subcutaneous (s.c.) infusion (mode A) and by continuous basal rate s.c. infusion + PCA (mode B) were compared in 8 cancer patients. Patients experimented with each infusion mode during 48 h. Statistical analysis was performed on data collected in 7 patients during 36 h from 22:00 h on day 1 to 10:00 h on day 3 and from 22:00 h on day 3 to 10:00 h on day 5. Mean hydromorphone dose +/- S.D. was 56.6 +/- 30.1 and 40.4 +/- 24.5 mg/36 h for modes A and B, respectively. There was no statistically significant difference observed in mean pain intensity, but the absence of significant difference may be related to the small sample size and high individual variability. Both methods provided adequate overall pain control in most patients. However, a large interindividual variation was detected. Indeed, some patients reported in the subjective questionnaire that they felt marked discomfort during hydromorphone administration with mode B. Only 2 patients chose mode B at the end of the study, but it was interesting to note that those 2 patients were the youngest of the group. This study demonstrated the effectiveness and safety of both modes of hydromorphone administration. The data suggest that it may be possible to identify particular cancer patients which can really benefit from an association of a basal rate infusion and PCA for opiate administration.
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PMID:Comparison of hydromorphone continuous subcutaneous infusion and basal rate subcutaneous infusion plus PCA in cancer pain: a pilot study. 768 79

Inadequately treated pain is a major cause of unanticipated hospital admissions after ambulatory surgery. The ability to provide adequate pain relief by simple methods that are readily available to the day-care patient in his or her home environment is one of the major challenges for providers of ambulatory surgery and anesthesia. The increasing number of extensive and painful surgical procedures (e.g., laparoscopic cholecystectomy, laminectomy, knee construction, hysterectomies) being undertaken on an ambulatory basis presents new challenges with respect to acute postoperative pain. Hence the availability of more sophisticated and effective treatment modalities, such as ambulatory PCA and continuous local and regional anesthetic blocks, with minimal side effects, are necessary to optimize the benefits of ambulatory surgery for both patient and health care provider. However, outcome studies are needed to evaluate the effect of these newer therapeutic approaches with respect to postoperative side effects and other important recovery parameters. Recent studies suggest that factors other than pain per se must be controlled to reduce postoperative morbidity and facilitate the recovery process. Not surprisingly, the anesthetic technique can influence analgesic requirement in the early postoperative period. Although oral analgesic agents will continue to play an important role, the adjunctive use of local anesthetic agents is likely to assume an even greater role in the future. Use of drug combinations (e.g., opiates and local anesthetics, opiates and NSAIDs) may provide improved analgesia with fewer side effects. Finally, safer and simpler analgesic delivery systems are needed to improve our ability to provide cost-effective pain relief after ambulatory surgery. In conclusion, as a result of our enhanced understanding of the mechanisms of acute pain and the physiological basis of nociception, the provision of "stress-free" anesthesia with minimal postoperative discomfort is now possible for most patients undergoing elective surgical procedures. The aim of an analgesic technique should be not only to lower the pain scores but also to facilitate earlier mobilization and reduce perioperative complications. If future clinical investigations clarify the issues that have been raised by laboratory studies, clinicians may be able to effectively treat postoperative pain using combinations of "balanced," "preemptive," and "peripheral" analgesia. More important, improved analgesic techniques will increase patient satisfaction and enhance their perception of ambulatory anesthesia and surgery.
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PMID:Postoperative pain management. 796 Jan 70

Quality of life may be considerably reduced in patients who are suffering from chronic lower limb venous insufficiency, although existing generic quality of life instruments (NHP, SF-36 or SIP) cannot completely identify their specific complaints. The Chronic Venous Insufficiency Questionnaire (CIVIQ) has been developed by iterative process. First, a pilot group of 20 patients was used to identify a number of important features of quality of life affected by venous insufficiency, other than physical symptoms of discomfort. A second study involving 2,001 subjects was used to reduce the number of items. Subjects were asked to score both the severity of their problems and the importance they attributed to each problem on a 5-point Likert scale. The importance items found in patients with venous insufficiency were subjected to factorial analyses (PCA, PAF). The final version is a 20-item self-administered questionnaire which explores four dimensions: psychological, physical and social functioning and pain. Internal consistency of the questionnaire was validated for each dimension (Cronbach's alpha > 0.820 for three out of four factors). Reproducibility was confirmed in a 60 patient test-retest study. Pearson's correlation coefficients for both the four dimension subscales and for the global score at 2-week intervals were greater than 0.940. Finally, the questionnaire was tested in a randomized clinical trial of 934 patients in order to assess responsiveness and the convergent validity of the instrument, together with the patient's own quality of life. This study demonstrated that convergence was valid: Pearson's correlation coefficients between clinical score differences and quality of life score differences were small (from 0.199-0.564) but were statistically different from 0 (p < 0.001). Standardized response mean (SRM) and effect size (ES) were calculated to assess sensitivity to change. SRM and ES both demonstrated considerable responsiveness to change (> 0.80). Reliability, face, content, construct validity and responsiveness were also determined for this specific quality of life questionnaire relating to venous insufficiency. Results suggest that this questionnaire may be used with confidence to assess quality of life in clinical trials on chronic venous insufficiency.
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PMID:Construction and validation of a quality of life questionnaire in chronic lower limb venous insufficiency (CIVIQ). 899

We previously showed that specific strains of human immunodeficiency virus (HIV)-1 infect the brain and contribute to Neuropathology, Cognitive Distress, and Neuropsychiatric Disease. To study further brain disease that results from HIV-1 infection, we commenced analysis of changes in gene expression in brain. We analyzed RNA purified from Frontal Cortex of 5 HIV-1 infected and 4 HIV-1 negative control subjects RNA was amplified and Affymetrix technology was used to analyze gene expression using the 12,585 gene Affymetrix Human Genome U95A chip. The expressed genes showed highly significant Pearsons correlations with each other within the two groups. Expression intensities were transferred to Microsoft Excel and Spotfire was used to analyze the results. Twenty-group K-means cluster analysis was done for HIV+ and HIV- subjects. Genes that were expressed in the same cluster numbers in the two groups were removed from further analysis. Analysis of Gene expression in the top 13 HIV+ clusters showed expression in the 40 gene categories designated in our prior studies. Genes from several categories occurred in more than one K-means cluster. Genes identified in these lists included several genes that have been previously studied: MBP, Myelin-PLP, NMDA receptor, MAG, astrocytic protein, Notch 3, APP, Senescence, proteasome, Ferritin, signaling, cell cycle, iNOS, Chemokine, splicing, synapse, protein tags, and ribosomal proteins. The first (primary significant) axis of both Principal Component Analyses ordered the genes in the same patient groups as the K-means cluster analysis for the respective patient groups. PCA was thus not more informative than K-Means cluster analysis. Ratios of HIV+ to HIV- intensities were calculated for all the averaged gene expression intensities. The ratio range was 0.14 to 9.26. The genes at the extremes (ad extrema) did not correspond to the gene order by K-means clustering (or PCA). The genes in the top 13 K-means clusters showed low-level changes by expression ratio. Genes ad extrema by ratio were in clusters with very large memberships. Mann-Whitney analysis confirmed expression ratio results. Several inferences result from our preliminary study. First, study design will be different in future studies involving additional replicates. Second, ratios inform us of the extent of changes in gene expression quantitatively. Third, Cluster methodology provides us with more subtle information, how bunches (clusters) of genes behave in terms of their centroids (attractors). Fourth, genes that change extensively by ratio tend to be in the larger k-Means clusters. We conclude that ranking gene expression with the use of expression ratio or by K-means clustering, yield different representations of the data.
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PMID:Analytic approaches to differential gene expression in AIDS versus control brains. 1535 27

Given the discomfort of thoracic surgical incisions, thoracic surgeons must understand and use contemporary multimodality pain treatments. Acute postthoracotomy pain not only causes psychologic distress to the patient but also has detrimental effects on pulmonary function and postoperative mobility, leading to increased morbidity. By choosing the most appropriate and least traumatic surgical incision, adhering to meticulous surgical techniques, and avoiding intercostal nerve injury or rib fractures, surgeons can minimize postoperative pain. Aggressive perioperative and postoperative pain management is best accomplished with use of an epidural anesthetic and covering breakthrough pain with an IV-PCA. Alternatively, an infusion system for continuous administration of local anesthetics directly in the subpleural plane, posterior to the intercostal incision, also provides excellent pain control. Again, use of an IV-PCA as adjuvant therapy is recommended. With careful planning, severe pain and its negative impact on thoracic surgical patients can be prevented.
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PMID:Management of postthoracotomy pain: acute and chronic. 1700 57

This prospective study was carried out is 250 patients undergoing CABG. The aim of this study was to assess the effects of high thoracic epidural anaesthesia during CABG, along with modified general anaesthsia; facilitate early extubation and fast tracking post operatively; evaluate effect on post-operative analgesia and discuss difficulties in patient selection for high thoracic epidural catheterization. 250 patients undergoing CABG over a period of nine months were included in this study. Patients with age >64 yrs, weight < 50 kg, EF < 50%, redo surgery, recent MI, receiving aspirin or ticlopidine or heparin were excluded from the study. A thoracic epidural catheter was inserted evening before surgery at T1-2 or T2-3 interspace. A total of 75 patients (30%) were found suitable to be included in this study. On table extubation or early extubation (within 3 hours) was achieved in 85% of cases. Post operative infusion of 0.1% Bupivacaine and 2 microg/ml Fentanyl was given epidurally through a PCA system for analgesia for 48-72 yrs. High thoracic epidural anaesthesia and modified GA regimen were helpful in fast tracking and early extubation of patients. Over 90% patients were discharged on day 5, from the hospital. All these patients experienced significantly less pain and discomfort following CABG. The procedural difficulties for inserting high thoracic epidural catheter were overcome with increasing experience.
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PMID:High Thoracic Epidural Anaesthesia and Post Operative Analgesia for Fast Tracking Patients undergoing CABG: Our Initial Experience. 1784 59

Since temperament affects the development of social behaviours and interpersonal relations, the possible links between autistic traits and temperament are of particular interest. The purpose of the study was to explore the relationships between autistic traits and temperamental characteristics in the framework of the Regulative Temperament Theory by Strelau, and the Emotionality, Activity and Sociability theory by Buss and Plomin, with particular emphasis on gender differences. The Autism Spectrum Quotient (AQ), Formal Characteristics of Behaviour--Temperament Inventory and Temperament Survey for Adults were administered. The participants were 593 university students, including 364 females and 229 males. Results showed positive correlations between autistic traits and Emotional Reactivity, Perseveration, Distress, Fear and Anger, and negative correlations with Activity, Briskness, Endurance and Sociability. The results of multiple regression analyses involving the Autism Spectrum Quotient score as a dependent measure were different for females and males. Results of exploratory PCA analysis showed that AQ score, Sociability and Activity loaded one factor (with AQ loading being opposite to two others). High AQ scorers demonstrated higher Emotional Reactivity, Perseveration, Distress and Anger, and lower Briskness, Endurance, Activity and Sociability as compared to norms for the general population. In this study we showed that temperament measures were able to identify items that correlated in parts with autistic traits, while other items were obverse. The relationships between temperament and autistic traits differ slightly between genders. We assume that with regard to the broader autism phenotype, temperaments might be helpful in characterizing healthy control samples.
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PMID:The relationship between temperament and autistic traits in a non-clinical students sample. 2586 May 8

The photoplethysmographic (PPG) signal measures the local variations of blood volume in tissues, reflecting the peripheral pulse modulated by cardiac activity, respiration, and other physiological effects. Therefore, PPG can be used to extract the vital cardiorespiratory signals like heart rate (HR), and respiratory rate (RR) and this will reduce the number of sensors connected to the patient's body for recording these vital signs. In this paper, we propose an algorithm based on ensemble empirical mode decomposition with principal component analysis (EEMD-PCA) as a novel approach to estimate HR and RR simultaneously from PPG signal. To examine the performance of the proposed algorithm, we used 310 (from 35 subjects) and 632 (from 42 subjects) epochs of simultaneously recorded electrocardiogram, PPG, and respiratory signal extracted from MIMIC (Physionet ATM data bank) and Capnobase database, respectively. Results of EEMD-PCA-based extraction of HR and RR from PPG signal showed that the median RMS error (1st and 3rd quartiles) obtained in MIMIC data set for RR was 0.89 (0, 1.78) breaths/min, for HR was 0.57 (0.30, 0.71) beats/min and in Capnobase data set it was 2.77 (0.50, 5.9) breaths/min and 0.69 (0.54, 1.10) beats/min for RR and HR, respectively. These results illustrated that the proposed EEMD-PCA approach is more accurate in estimating HR and RR than other existing methods. Efficient and reliable extraction of HR and RR from the pulse oximeter's PPG signal will help patients for monitoring HR and RR with low cost and less discomfort.
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PMID:Ensemble Empirical Mode Decomposition With Principal Component Analysis: A Novel Approach for Extracting Respiratory Rate and Heart Rate From Photoplethysmographic Signal. 2828 94


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