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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Der Anaesthesist 43 (1994), S. 159-167 
    ISSN: 1432-055X
    Keywords: Schlüsselwörter: Erholung, postoperative – Epiduralanästhesie – Allgemeinanästhesie – Propofol ; Key words: Anaesthesia recovery period – Anaesthesia, epidural – Anaesthesia, general – Propofol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract. Early mental and psychomotor recovery was studied in 67 patients undergoing colorectal surgery under continuous epidural anaesthesia and light general anaesthesia using propofol, halothane, and midazolam/fentanyl. The study was approved by the local ethics commitee. All patients received epidural anaesthesia with 0.25% bupivacaine and were then randomly allocated to one of three groups. In group I (halothane), light general anaesthesia was induced with thiopental 3 – 5 mg/kg and maintained with halothane. The propofol group (II) received 2 mg/kg for induction and a mean continuous infusion of 1.7 mg/kg⋅h. In group III (Mi/Fe), midazolam and fentanyl were used for induction and maintenance. All patients were intubated, received non-depolarising muscle relaxants, and were manually ventilated with nitrous oxide-oxygen (2 : 1.2). For postoperative analgesia, 0.05 mg/kg morphine was administrated epidurally 30 min before the end of the operation; 30, 60, 90, and 120 min after arriving in the recovery room, vigilance was assessed using a modified Steward score, the Trieger test, the ability to recall a column of numbers (KAI test), and symbol counting (CI test). Heart rate, blood pressure, arterial oxygen saturation, and blood gases were recorded. Results. The three groups were comparable with regard to age, sex, ASA classification, and duration of anaesthesia and operation (Table 3). There was no difference between the groups in performance of the recovery tests (Figs. 2 – 5), blood pressure, heart rate, arterial blood gas analysis (Fig. 6), or oxygen saturation. Comparing pre- and postoperative values, we found severe psychomotor and mental impairment in all groups. pCO2 was slightly elevated in all groups, but only 3 patients in the propofol group and 6 in the midazolam/fentanyl group developed hypercapnia above 50 mm Hg. Patients receiving propofol or midazolam/fentanyl had significantly less postoperative nausea and vomiting than those receiving halothane (Table 5). Conclusion. It is concluded that propofol offers no advantage over halothane or midazolam/fentanyl where early postoperative recovery is concerned. Intraoperatively, all three techniques provided good anaesthesia. Propofol and midazolam/fentanyl caused less postoperative nausea and vomiting than halothane anaesthesia.
    Notes: Zusammenfassung. Bei 67 Patienten, die sich einem Koloneingriff in kontinuierlicher Epiduralanästhesie und leichter Allgemeinanästhesie unterzogen hatten, wurde das postoperative Aufwachverhalten untersucht. In Gruppe I (Halothan) wurde die Allgemeinanästhesie mit Thiopental eingeleitet und mit Halothan aufrechterhalten. Propofol wurde in Gruppe II zur Einleitung und Aufrechterhaltung der Anästhesie verwendet. Gruppe III (Mi/Fe) erhielt eine Midazolam/Fentanyl-Anästhesie. Zur postoperativen Analgesie erhielten die Patienten etwa 30 min vor OP-Ende 0,05 mg/kg Morphin epidural. 30, 60, 90 und 120 min nach Ankunft der Patienten im Aufwachraum wurde die Vigilanz mit einem modifizierten Steward-Score, dem Punkteverbindungstest nach Trieger, dem KAI-Test und dem C.I.-Test erfaßt. Dabei zeigten sich zu keinem Zeitpunkt Unterschiede zwischen den Gruppen. Der Vergleich prä- und postoperativer Werte zeigte jeweils eine deutliche Beeinträchtigung der mentalen und psychomotorischen Leistungsfähigkeit. Nach Propofol und Midazolam/Fentanyl traten Übelkeit und Erbrechen seltener auf als nach Halothan.
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  • 2
    ISSN: 1432-055X
    Keywords: Schlüsselwörter Droperidol ; Nebenwirkungen ; Angst ; Anspannung ; Befindlichkeit ; Postoperative Übelkeit und Erbrechen ; Key words Droperidol (side-effects) ; Anxiety ; Tension ; Overall mood ; Postoperative nausea and vomiting
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract Background: Droperidol even in low doses such as 0,5 mg to 1,25 mg can increase postoperative anxiety and state of tension. The aim of this study was to determine whether these side effects occur frequently following low-dose droperidol and to see whether these are dose related. Methods: 184 female in- and outpatients ASA grade 1 and 2 undergoing gynaecological laparoscopy were recruited to this prospective, double-blind study. General anaesthesia was standardized (induction with thiopentone, fentanyl 2 µg/kg and vecuronium 0,1 mg/kg, tracheal intubation, maintainance with enflurane in N2O/O2). Patients were randomly allocated to receive saline (n=45), 0,625 mg (n=46), 1,25 mg (n=47) or 2,5 mg (n=46) droperidol i.v. 10 minutes before the end of surgery. 1, 3, 6, and 24 hours postoperatively, the patients’ anxiety, state of tension and overall mood was evaluated using two psychological questionnaires which had been tested for the perioperative period (Erlanger anxiety and tension-scale / BSKE-EWL-test). Sedation was evaluated by the staff of the recovery room. In addition, postoperative nausea and vomiting (PONV) was assessed using a 100 mm visual analogue scale and by counting the episodes of retching or vomiting. PONV was then rated over the whole observation period as none, mild, moderate or severe using a fixed scoring algorithm. Statistical analysis was performed using the ANOVA and the chi2-test. Results: The patients did not differ with regard to biometric data, duration of surgery and anaesthesia. The postoperative scores for anxiety, state of tension and overall mood were not different between the groups at any observation time (Fig. 1: anxiety and tension: P=0,5687; figure 2: overall mood: P=0,0647). Quality of sleep in the first night after surgery was the same in all groups (Table 2 and 3). Sedation was not significantly different (Table 4; P=0,0704). Furthermore, duration of stay in the recovery room did not differ (P=0,4353). On the other hand, three patients from the 2,5 mg droperidol group had to stay unexpectedly on the ward overnight, because they had been too much sedated to be discharged at home. This was not the case with any patient from the other groups. Compared to placebo, PONV over the whole 24 h observation period was significantly reduced by droperidol (Fig. 3; P=0,0338): completely free from PONV: placebo: 41,3%, 0,625 mg droperidol: 67,4%, 1,25 mg droperidol: 53,2%, 2,5 mg droperidol: 71,7%. Also the severity of PONV was reduced. Conclusion: In gynaecological laparoscopy under general anaesthesia with tracheal intubation, we recommend droperidol 0,625 mg in the prevention of PONV, as it reduces PONV as well as 2,5 mg with no severe sedation in this dosage. Psychological side effects did not occur more frequently after droperidol compared to placebo in any of the investigated dosages.
    Notes: Zusammenfassung In vorliegender Studie wurden das Ausmaß postoperativer Angst, innerer Anspannung und allgemeiner Befindlichkeitsstörungen nach intraoperativ verabreichtem Droperidol und eine mögliche Dosisabhängigkeit dieser Nebenwirkungen untersucht. Zu diesem Zweck wurden erstmals zwei evaluierte Selbstbeurteilungsfragebögen eingesetzt. 184 ASA I und II Patientinnen, die sich einer gynäkologischen Laparoskopie in standardisierter Intubationsnarkose unterzogen, wurden in diese randomisierte, doppelblinde und plazebokontrollierte Untersuchung aufgenommen. Zehn Minuten vor Narkoseende erhielten die Patientinnen i.v. Kochsalz, 0,625 mg, 1,25 mg oder 2,5 mg Droperidol. Angst und allgemeines Befinden sowie Übelkeit und Erbrechen in der postoperativen Phase (PONV) wurden 1, 3, 6 und 24 h postoperativ registriert. Die Werte für Angst und allgemeines Befinden zeigten zu keinem Untersuchungszeitpunkt Gruppenunterschiede. Die Schlafqualität in der ersten postoperativen Nacht war in allen Gruppen gleich. Verglichen mit Plazebo wurde PONV durch Droperidol in jeder Dosierung gesenkt (p=0,0338): komplett frei von PONV: Plazebo: 41,3%, Droperidol 0,625 mg: 67,4%, 1,25 mg: 53,2%, 2,5 mg: 71,7%. Bei gynäkologischen Laparoskopien in Intubationsnarkose empfehlen wir zur Prophylaxe von PONV 0,625 mg Droperidol, da es ebensogut antiemetisch wirksam ist wie 2,5 mg. Psychische Nebenwirkungen wie Angst oder andere Befindlichkeitsstörungen treten in keiner der untersuchten Droperidoldosierungen vermehrt auf.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Der Anaesthesist 48 (1999), S. 786-793 
    ISSN: 1432-055X
    Keywords: Schlüsselwörter Perioperative Komplikationen ; Qualitätssicherung ; Benchmarking ; Prozeßanalyse ; Ergebnisforschung ; Key wordsAnaesthesia ; Intraoperative complications ; Postoperative complications ; Health Care Quality ; Access, and Evaluation ; Quality Assurance ; Health Care ; Benchmarking ; Quality of Health Care ; Health Care Evaluation Mechanisms ; Outcome and Process Assessment (Health Care)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract Aim: The German Society of Anesthesiology and Intensive Care Medicine evaluated the standardized reporting of perioperative anaesthesia-related incidents, events, and complications (IEC). As part of the data validation efforts, the problem of variation in documentation procedure was evaluated. Methods: A study group of particularly motivated and instructed residents and attendants was scrutinized at a University teaching hospital from April through June 96. IEC assessment was completed according to the Society’s definitions. Results: Out of 4242 anaesthetics during the study period 839 (19.8%) were completed by the study group. In the univariate analysis, the incidence of IECs was significantly (P〈0.001) more reported by the physicians studied (36.4%) thanby the control group (18.6%). In a multivariate analysis, while adjusting for all covariables, reported incidence of IEC was 2.4-fold significantly increased (P〈0.001). Conclusions: This study is another step in validating the assessment of IECs. The results gain importance with respect to upcoming nationwide quality comparisons among anaesthesia providers. In addition, they give a better estimate of economic implications from IECs within the institution.
    Notes: Zusamenfassung Fragestellung: Die Deutsche Gesellschaft für Anästhesiologie und Intensivmedizin (DGAI) empfiehlt seit 1992 die kontinuierliche Erfassung von Anästhesie-Verlaufsbeobachtungen (AVB). Bezüglich der Datenvalidität stellt sich die Frage, wie die erhobene AVB-Häufigkeit von der Dokumentationsdisziplin des Anästhesiepersonals abhängt. Methodik: Eine Studiengruppe von besonders motivierten und instruierten Assistenz- und Oberärzten wurde über einen Zeitraum von April bis Juni 1996 an einer Universitätsklinik beobachtet. Jeder Studienteilnehmer verpflichtete sich zur besonders sorgfältigen AVB-Dokumentation gemäß den Definitionen der DGAI. Ergebnisse: Im Studienzeitraum wurden 839 von insgesamt 4242 (19,8%) Anästhesien von Studienteilnehmern durchgeführt. Die Inzidenz von AVBs war in der univariaten Analyse bei der Studiengruppe mit 36,4% signifikant höher als bei den übrigen Kollegen mit 18,6% (p〈0,001). In der multivariaten Analyse ergibt sich, korrigiert nach allen Kovariablen, bei der Studiengruppe eine 2,4-fach signifikant höhere AVB-Inzidenz (p〈0,001). Schlußfolgerungen: Dies ist für Qualitätsvergleiche zwischen anästhesiologischen Einrichtungen und für die ökonomischen Auswirkungen von AVBs innerhalb der Abteilung gleichermaßen wichtig zu wissen. Die Studie ist ein weiterer Schritt zur Validierung der Erhebung von Anästhesie-Verlaufsbeobachtungen.
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  • 4
    ISSN: 1432-055X
    Keywords: Schlüsselwörter Postoperative Übelkeit ; Komplikationen ; postoperative ; Risikofaktoren ; Risikoscore ; ROC-Kurven ; Key words Postoperative nausea and vomiting (PONV) ; Postoperative complications ; Receiver-operating characteristics (ROC) curve ; Risk factors ; Risk score
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract Background: A risk score to predict postoperative vomiting was presented in a recent issue of this journal. In the present study this score was evaluated at another hospital under different surgical and anaesthetic conditions. Furthermore, we examined whether the score, which was originally designed to predict the occurrence of postoperative vomiting (POV) only, is also useful for prediction of postoperative nausea and vomiting (PONV). Methods: The risk score was applied to 226 patients undergoing inpatient orthopaedic surgery under standardised general anaesthesia (propofol, desflurane in N2O/O2, fentanyl, vecuronium, postoperative opioid analgesia). For 24 hours postoperatively, the patients were followed up for the occurrence of nausea, retching, and vomiting. Perioperatively, risk factors for POV were recorded (gender, age, smoking habits, history of previous PONV or motion sickness, duration of anaesthesia). Using these risk factors the individual risk for suffering POV was calculated for each patient. With these data two ROC-curves (for prediction of POV and PONV respectively) were constructed and the area under the ROC-curve (AUC) as a means of the prediction probabilities of the score was calculated. Results: The incidence of POV as predicted by the score (22,8%) fits well to the actual incidence of this event (19,5%). The score predicts the occurrence of POV significantly better than can be expected by a random estimation. In spite of different surgical and anaesthetic conditions, the accuracy of the prediction in the present dataset was not significantly different from that reported by the authors of the scores in their validation set. Furthermore, the prediction properties for POV (AUC: 0,73) were not different from the prediction of PONV (AUC: 0,72). Conclusion: The present risk score provides valid prognostic results even under modified surgical and anaesthetic conditions, and, thus, may obviously be applied to other institutions. Furthermore our results support the hypothesis, that individual risk factors rather than the type of surgery or anaesthetic management have a major impact on the occurrence of POV and PONV.
    Notes: Zusammenfassung Fragestellung: Kürzlich wurde in dieser Zeitschrift ein Risikoscore zur Vorhersage von Erbrechen nach Inhalationsanästhesien vorgestellt. In der vorliegenden Untersuchung wurde dieser Risikoscore einer externen Evaluation unter veränderten operativen und anästhesiologischen Rahmenbedingungen unterzogen. Darüber hinaus wurde untersucht, ob sich der vorliegende Score, der ursprünglich nur zur Vorhersage postoperativen Erbrechens (PE) entwickelt wurde, auch zur Prädiktion von Übelkeit und Erbrechen in der postoperativen Phase (PONV) eignet. Methodik: Bei 226 Patienten, die sich in standardisierter Allgemeinanästhesie einer elektiven orthopädischen Operation unterzogen, wurden prospektiv Risikofaktoren für das Auftreten von PE erhoben (Alter, Geschlecht, Raucherstatus, anamnestisches PONV oder Reisekrankheit, Anästhesiedauer). Anhand dieser Angaben wurde später mit Hilfe des Risikoscores das persönliche Risiko für PE berechnet. Postoperativ wurde innerhalb eines 24-stündigen Beobachtungszeitraums das tatsächliche Auftreten von PE (Würgen und/oder Erbrechen) bzw. PONV (Übelkeit und/oder Würgen oder Erbrechen) erfaßt. Anhand dieser Informationen wurden zwei ROC-Kurven erstellt und die Fläche darunter (AUC) als Maß für die Vorhersagegenauigkeit statistisch miteinander verglichen. Ergebnisse: Die durch den Score vorhergesagte PE-Inzidenz (22,8%) deckt sich gut mit der tatsächlichen Inzidenz von PE (19,5%). Der Score sagt darüber hinaus das Auftreten von Erbrechen signifikant besser voraus als eine zufällige Vorhersage (AUC: 0,73). Die Vorhersagegenauigkeit unterscheidet sich trotz unterschiedlicher chirurgischer und anästhesiologischer Rahmenbedingungen nicht signifikant von der, die von den Autoren des Scores an einem Kontrolldatensatz ihrer Klinik bestimmt wurde. Der Score prognostiziert darüber hinaus das Auftreten von Übelkeit und Erbrechen (AUC: 0,72) genauso zuverlässig wie Erbrechen allein. Schlußfolgerung: Der vorliegende Risikoscore liefert auch unter abgeänderten Ausgangsbedingungen valide Vorhersageergebnisse und scheint somit auf andere Krankenhäuser übertragbar zu sein. Die vorliegenden Ergebnisse stützen die Hypothese von Apfel et al., daß für das Erbrechenrisiko nach balancierter Anästhesie mit volatilen Anästhetika in erster Linie individuelle Faktoren und weniger die Operation bzw. das anästhesiologische Management verantwortlich sind.
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  • 5
    ISSN: 1432-055X
    Keywords: Schlüsselwörter Postoperative Übelkeit und Erbrechen ; Transdermales Scopolamin ; PONV ; PONV-Prophylaxe ; Antimedika ; Prämedikation ; Key words Postoperative nausea and vomiting ; Transdermal hyoscine (scopolamine) ; PONV ; Prevention of PONV ; Antiemetics ; Premedication
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract In a prospective double-blind trial, transdermal scopolamine (TS) was compared to placebo (P) in the prevention of postoperative nausea and vomiting (PONV) within a 48-h interval. After stratification for gender and surgical procedure, patients were randomly chosen to receive either TS or placebo. Methods. Of 304 surgical and gynaecologial patients included in this study, the data of 263 patients were evaluated (48 thyroidectomies, 15 open, and 36 laparoscopic cholecystectomies, 41 open, and 36 laparoscopic hernia repairs, 37 hysterectomies, and 50 gynaecological laparoscopies). The two groups were comparable with regard to biometrical data and duration of anaesthesia and surgery. Although anaesthesia was not standardized, there was no difference in anaesthesia techniques, drug dosage or perioperative management. Patients were evaluated once preoperatively and 2, 6, 10, 24, and 48 h postoperatively using a 100-mm visual analogue scale (VAS) for „nausea“, „pain“, „dry mouth“, „sedation“, and „blurred vision“. Episodes of vomiting or retching and the need for additional antimetics (0.03 mg·kg−1 metoclopramide i.v., followed by 1 mg·kg−1 dimenhydrinat i.v., if necessary) were recorded. Results. TS significantly reduced the incidence of postoperative vomiting within the first 48 h postoperatively [TS: 47 patients (36.2%) with 125 cumulative episodes vs P: 70 patients (52.6%) with 209 cumulative episodes]. Analysing the five observation intervals seperately, this difference could only be demonstrated 0–2 h and 6–10 h postoperatively. In patients suffering from emetic sequelae, TS did not reduce the frequency of vomiting significantly (mean frequency: TS: 2.7 vs P: 3.0). TS also had no significant effect on the requirement of additional antiemetics [TS: 81 times in 46 (35.7%) patients vs P: 116 times in 58 (44.3%) patients]. Nausea as rated by the VAS was not significantly different between the two groups at any time during the postoperative observation. No relevant side-effects occurred, although there was a trend toward higher ratings of “dry mouth” in the TS group, reaching statistical significance 10 h after operation. Conclusion. The routine administration of TS for gynaecological and surgical patients cannot be recommended because of the lack of effect on postoperative nausea and only marginal benefit concerning postoperative vomiting.
    Notes: Zusammenfassung In dieser prospektiven, randomisierten und nach Geschlecht und OP-Art geschichteten Doppelblindstudie wurde der prophylaktische antiemetische Effekt von transdermalem Scopolamin (TS) im Vergleich zu Plazebo (P) an 304 Patienten untersucht. Transdermales Scopolamin verringerte in den ersten 48 h nach OP die Inzidenz von postoperativem Erbrechen signifikant von 52% (70 Patienten mit 209 emetischen Episoden) auf 36% (47 Patienten mit 125 emetischen Episoden). Dieser Effekt ist aber nur 0–2 h und 6–10 h postoperativ statistisch zu sichern. Wenn Erbrechen auftrat, hatte TS keinen Einfluß auf die Schwere des Erbrechens (TS: im Schnitt 2,7 emetische Episoden vs. P: 3,0 emetische Episoden). TS war zudem unwirksam bei der Prophylaxe postoperativer Übelkeit: zusätzliche Antiemetikagaben waren in beiden Gruppen bei annähernd gleich vielen Patienten erforderlich (TS: 46 (35,7%) Patienten mit 81 Gaben vs. P: 58 (44,3%) Patienten mit 116 Gaben). Auch die subjektiven Bewertungen der Übelkeit mittels einer visuellen Analogskala unterschieden sich zu keinem Zeitpunkt signifikant untereinander. Relevante Nebenwirkungen traten unter TS nicht auf. Allerdings zeigte sich ein deutlicher Trend zu einer stärkeren Mundtrockenheit, der zum 10 h-Zeitpunkt auch statistisch signifikant war. Eine routinemäßige Applikation von TS bei allgemeinchirurgischen und gynäkologischen Eingriffen ist wegen der fehlenden Wirkung auf die postoperative Übelkeit und des nur relativ geringfügigen Effekts auf das postoperative Erbrechen nicht empfehlenswert.
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  • 6
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Postoperative nausea and vomiting (PONV) are frequent and unpleasant symptoms. This prospective study aimed to assess the efficacy of a multimodal approach to prevent PONV, and patient satisfaction using the willingness-to-pay method. Two validated risk scores were applied to forecast the individual risk for PONV in 900 consecutive patients of whom 108 were identified as high-risk patients (predicted risk: 79–87%). High-risk patients received multimodal anti-emetic prophylaxis: total intravenous anaesthesia with propofol, high fractional inspired oxygen (80%), omission of nitrous oxide, dexamethasone 8 mg, haloperidol 10 µg.kg−1, and tropisetron 2 mg. Of the remaining patients with low or moderate risk for PONV, a random sample of 71 females received balanced propofol-desflurane anaesthesia without prophylactic anti-emetics. All patients were interviewed 2 and 24 h after surgery for occurrence of nausea and vomiting. Patient satisfaction was measured using the willingness-to-pay method. The incidence of PONV (95%-confidence interval) in the control-group was 41% (29–51%), slightly lower than predicted by the risk scores (53–57%). The multimodal anti-emetic approach reduced the predicted risk (79–87%) in the high risk-group to 7% (3–14%). This was associated with a high willingness-to-pay median (25th/75th percentile) of £84 (£33–184) in the multimodal anti-emetic grouped compared to £14 (£4–30) in the control group. A multimodal anti-emetic approach can considerably reduce the incidence of PONV in high-risk patients and is associated with a high patient satisfaction as measured by the willingness-to-pay method.
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  • 7
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Although site of surgery and previous occurrence of postoperative nausea and vomiting are often used to decide whether prophylactic anti-emetic drugs are indicated, the value of these predictors is unclear. We compared these two risk factors against a simplified four-factor risk score. We analysed data from 1566 adult inpatients who received balanced anaesthesia without prophylactic anti-emetics. Sensitivity, specificity, predictive value and area under the receiver operating characteristic curve were used to quantify predictive properties. Nausea and vomiting occurred in 600 (38.3%) patients within 24 h. Sensitivity and specificity were, respectively, 47% and 59% for surgical site; 47% and 70% for history of postoperative nausea and vomiting; and 58% and 70% for risk score with three or more factors. The area under the curve for surgical site was 0.53 (95% CI 0.50–0.56); that for patient's history was 0.58 (95% CI 0.56–0.61) while for risk score it was 0.68 (95% CI 0.66–0.71; P 〈 0.001). Prediction using surgical site or patient's history alone was poor while the simplified risk score provided clinically useful sensitivity and specificity.
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  • 8
    ISSN: 1433-0423
    Keywords: Schlüsselwörter Thrombendarteriektomie ; TEA ; Okulärer Blutfluss ; A. carotis ; Pulsamplitude ; Key words Thrombendarterectomy ; CEA ; Ocular blood flow ; Carotid artery ; Pulse amplitude
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract Successful operations of clinically significant carotid artery stenosis by carotid endarterectomy (CEA) are leading to a better perfusion in the region of this artery. It still creates problems to make a statement about cerebral and ocular perfusion during the operation. Methods. In 10 patients who underwent a CEA the pulse amplitude (PA) of the intraocular pressure (IOP) was measured intraoperatively by a pneumotonograph (OBF-Systems, U.K.) and the so called pulsatile ocular blood flow (pOBF) was determined. The middle arterial blood pressure (MAP) was taken invasively during the operation. Results. During the clamping phases no PA could be recorded. PA (p=0.04) and pOBF (p=0.028) increased on the side which had been operated on. No correalations of PA and pOBF to MAP were found. Conclusion. This method can prove an increased pulsatile ocular blood flow after successful CEA.
    Notes: Zusammenfassung Erfolgreiche Thrombendarteriektomien (TEA) der A. carotis interna führen zu einer verbesserten Perfusion im Stromgebiet dieser Arterie. Es ist jedoch schwierig, während der Operation Aussagen über die zerebrale und okuläre Durchblutung zu treffen. Methode. Bei 10 Patienten mit klinisch signifikanter A.-carotis-Stenose, die sich einer A.-carotis-TEA unterzogen erfolgte eine nichtinvasive intraoperative Messung der Pulsamplitude (PA) des intraokularen Drucks mit einem Pneumotonographen (OBF-Systems, U.K.). Aus der PA wurde der sog. Pulsatile okuläre Blutfluss (pOBF) errechnet. Der mittlere arterielle Blutdruck wurde während der gesamten Operation invasiv gemessen. Ergebnisse. Während der Abklemmphasen konnte keine PA gemessen werden. Postoperativ kam es zu einem Anstieg der PA (p=0,04) und des pOBF (p=0,028) auf der operierten Seite im Vergleich zu den präoperativen Werten. Es wurde kein Zusammenhang zwischen dem pOBF bzw. der PA und dem mittleren arteriellen Blutdruck festgestellt. Schlussfolgerung. Diese Methode kann eine veränderte pulsatile okuläre Perfusion nach einer erfolgreichen TEA nachweisen.
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