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H Troidl

Publications and source records attributed to H Troidl.

At least 37 records · Page 2Linked to original sources

[How much pain is tolerable? Target expectations of surgical patients for pain therapy].

INTRODUCTION: Sufficient pain treatment is part of surgical therapy. One popular method of pain control is patient-controlled analgesia (PCA), which allows the patients to apply small doses of analgesics intravenously via a pump. Patient involvement in PCA requires an exact assessment of the patient's expectations as to the treatment of pain. METHODS: In a prospective study the patient's expectations of pain therapy were observed with respect to their disease and the actual intensity of pain during activities measured with a visual analogue scale (VAS). Fifty-three patients were involved, using a pain questionnaire. Healthy nursing staff (n = 44) served as a control group. RESULTS: Patients with benign (n = 29) or malignant (n = 24) disease showed no significant difference in the VAS scores accepted from patients as aim of successful pain therapy (25 points in the conservatively treated group and 27 points in the group of the operatively treated patients with malignant disease, 21 points in the operatively treated group with benign disease, and 18 points in the group suffering from chronic pain of benign causes). The aims for pain therapy showed no correlation with the actually felt pain intensity during movement. The control group of healthy nursing staff felt less actual pain during movement, but their expectations for sufficient pain treatment were not significantly different from the study patients (VAS 25.4 points).

Adult↗

Evaluation of the effects of a pneumoperitoneum with carbon dioxide or helium in a porcine model of endotoxemia.

BACKGROUND: The expansion of the laparoscopic techniques to the critically ill patient is currently under debate. In order to evaluate the potential risks of performing laparoscopy in a body with signs of sepsis, the effects of the pneumoperitoneum were studied in a porcine model of mild endotoxemia. METHODS: Twenty-eight pigs were separated into four groups of seven animals: untreated control (C), 2 microg/kg/h endotoxin (E), endotoxin and a pneumoperitoneum (3 h, 15 mmHg) with CO2 (EC) or with helium (EH). Hemodynamic and homeostatic variables were studied for a period of 5.5 h. Primary endpoints were arterial and mucosal pH and the ATP content of the bowel wall. Statistical evaluation was performed using analysis of variance and the Bonferroni test. RESULTS: Endotoxin infusion induced characteristic symptoms of early sepsis: increase of arterial CO2, pulmonary arterial, portal venous, and pulmonary artery wedge pressure, and decrease of arterial pressure, cardiac output, arterial and mucosal pH. An additional pneumoperitoneum led to aggravation of all criteria with significant alterations in arterial and mucosal pH, arterial CO2, wedge and portal venous pressure. The most striking derangement of mean values was observed for mucosal pH (EC: 7.40, EH: 7.54) and arterial pH (EC: 7.15, EH: 7.18). In group EC, two animals died in septic shock. CONCLUSION: Applying a pneumoperitoneum during an ongoing sepsis significantly deteriorates hemodynamic and homeostatic variables, thus enhancing the risk of severe complications.

Adenosine Triphosphate↗

Prospective double-blind randomised study of a new regimen of pre-emptive analgesia for inguinal hernia repair: evaluation of postoperative pain course.

OBJECTIVE: To evaluate the effectiveness of a new regimen of pre-emptive analgesia on the development of postoperative pain after inguinal hernia repair. DESIGN: Prospective, double-blind, randomised study. SETTING: University Hospital, Germany. SUBJECTS: 70 consecutive patients who had primary unilateral inguinal hernia repairs. INTERVENTIONS: A new regimen of pre-emptive analgesia with bupivacaine that was infiltrated preoperatively, intraoperatively, and postoperatively was tested. The control group were given saline infiltrations at the same times. Pain was measured up to postoperative day 30 using the visual analogue scale (VAS), the verbal rating scale (VRS), and by recording patient-controlled use of ibuprofen suppositories. RESULTS: Pain was significantly less in the pre-emptive analgesia group than in the control group during the first 10 days postoperatively as assessed by VAS and VRS (p < 0.05). Analgesic consumption was also significantly reduced in the pre-emptive analgesia group (p < 0.05). Multivariate analysis showed that bupivacaine infiltration (pre-emptive analgesia) was associated with significantly less postoperative pain (p < 0.0001). CONCLUSION: This regimen of pre-emptive analgesia is an effective and safe method of reducing postoperative pain and analgesic consumption after inguinal hernia repair.

Adult↗

[Laparoscopically guided reversal of Hartmann's procedure].

UNLABELLED: Morbidity and mortality after reversal of Hartmann's procedure following perforated sigmoid diverticulitis are high and the rate of intestinal restoration is low. AIM: To investigate whether laparoscopically assisted reversal of Hartmann's procedure is technically feasible and whether the laparoscopic procedure offers any benefit to the patient. METHOD: Nineteen patients were investigated. The postoperative course was followed prospectively. All patients were reinvestigated 9 months after surgery. RESULTS: Laparoscopic reversal of Hartmann's procedure was attempted in 19 patients. One patient did not want the laparoscopic technique. In two cases (11 %) conversion to the conventional technique was necessary; thus, 16 patients were operated laparoscopically. Median operative time was 114 (65-180) min. With the exception of three wound infections no immediate postoperative complications were noticed. Patients' convalescence was fast. First evacuation took place 3.3 (3-5) days after surgery, complete oral nutrition 3.6 (3-5) days after surgery. Duration of postoperative hospitalisation was 7.5 (5-12) days. One patient developed later a clinically significant anastomotic stricture which needed endoscopic dilatation. CONCLUSION: Laparoscopically assisted Hartmann's reversal is technically demanding but feasible. Postoperative morbidity is low, duration of hospitalisation short, convalescence fast. Thus, good arguments exist for performing reversal of Hartmann's procedures laparoscopically.

Adult↗

First step: the idea.

It is a fact that without ideas there is nothing. Without ideas and without innovations there is nothing to test. An interesting, often asked question is: How are ideas, innovations born? It is surely correct that people giving birth to ideas have special characteristics. These creative people are different but still have many, maybe essential, characteristics in common. They are open-minded. Abnormality is interesting for them. They are highly emotional, passionate. They are intelligent and naive at the same time. They are often like children but they also are determined and enjoy their lives. It is a fact that an idea, once born, does not always attain fruition; place, time, social environment, and society have to fit. The domain has to be prepared for it. The true pioneer is the one who has seen the beginning to a certain degree but also brings the new idea to the public, places it on the agenda, accompanies it with positive skepticism, and most of all carries it over the "finishing line." Giving birth to an idea is an important step. Testing the idea regarding its effectivity is a necessity. Since Decartes, in our Western way of thinking, we have a systematic methodic procedure. The idea is expressed in a hypothesis. Here the hypothesis is: "Endoscopic surgery supplies more comfort and means less trauma at the same or greater safety." This is the idea, the dream, the hypothesis. In concrete terms it means less pestering, less pain, less fatigue, and in general a quicker return to daily life during the pre- and postoperative course. Less trauma means less stress response of the body; these are the true endpoints. In the long run, endoscopic surgery means-this being the unproved prerequisite-physical integrity, less immunosuppression, and last but not least consideration of the abdominal wall (in concrete terms, fewer incisional hernias). Thus the relevant endpoints have been formulated by the concrete terms of the hypothesis. This makes clear that comfort relates to-and this is for the first time-"soft" data. This is the true revolution. For me this is a true change of paradigm. Here a few important problems become evident. In the first place, a solution must be found-with the intention of reality and coolness-for the problem of comparing "soft" and "hard" data. With this problem it must be clear that subjective endpoints strongly depend on social and cultural circumstances and are probably influenced more by these factors than by the endoscopic surgery itself. The placebo effect must also be considered. Up to 50% of the subjective endpoints are due to the placebo effect, especially with surgery. For example, pain and return to work depend heavily on socioeconomic aspects and the placebo effect. In summary, the first step is the idea; the second step is testing the idea for effectiveness. Endoscopic surgery as a patient-friendly treatment is the idea, the hypothesis. This hypothesis must be tested according to our present standard of methodology. In addition to the "conventional" endpoints (negative events), the comfort of the patient is the true endpoint of patient-friendly surgery-endoscopic surgery.

Diffusion of Innovation↗

Second step: testing-outcome measurements.

Despite worldwide enthusiasm for endoscopic surgery, this new technology is now on the top of McKinlay's "product life circle curve." Critical questions are being asked about its benefits and burdens, but the concepts applied and the methodologies used for technology assessment are in a similar position as endoscopic surgery and need a critical evaluation. (1) There are incorrect and outdated concepts for the scientific basis of surgery (surgical theory) including the basic sciences involved; biomedicine still dominates, but assessment of outcome after operations is no longer possible without clinical epidemiology and social psychology. (2) Based on an outdated scientific theory for surgery, an outdated concept of disease is still propagated. It is denoted as mechanical and is based solely on biomedicine. Human subjects are reduced to biologic machines, and outcomes measurement excludes most dimensions of functioning and well-being. To achieve a valid result for outcome measures, a hermeneutic approach must be combined with the mechanical approach. (3) Based on an outdated model of disease, the outcomes used in endoscopic surgery rely too much on traditional measures, such as mortality rate, complication rate, hospital stay, and especially an endless list of biochemical mediators. Their alterations during the perioperative period have not yet been shown to be related to clinical or hermeneutic outcomes. A new method of assessment for clinical trials in endoscopic surgery and for other surgical problems is outlined, such as for surgical infections and for surgical oncology. It includes an index of recovery and objective health status assessed by the doctor, a quality-of-life self-report by the patient, and the true endpoint concept as a critical weighting of both types of outcome by patients and doctors.

Endoscopy↗

CO(2) pneumoperitoneum: what we know and what we need to know.

The development of the laparoscopic technique in surgery was so overwhelming that scientific evaluation could not keep in step. While investigators were still discussing the effects of the pneumoperitoneum on the healthy organism, laparoscopy was already performed in patients with an acute abdomen due to trauma or disease. Therefore, there is an urgent need of further experimental and clinical studies with relevant endpoints to gain external evidence concerning the benefits of diagnostic or therapeutic laparoscopy for critically ill patients. In experiments with pigs we have shown that even in a healthy organism perfusion and energy metabolism of the small bowel is impaired by a pneumoperitoneum with carbon dioxide. Under the conditions of a systemic inflammatory response syndrome induced by infusion of endotoxin, the negative effects of the pneumoperitoneum were significantly amplified. Furthermore, we found that the increased intracranial pressure as caused by a head injury was further enhanced during a pneumoperitoneum but not by the alternative method of mechanical wall retraction. The current literature dealing with the effects of a pneumoperitoneum in critically ill patients is still controversial. Our data support the results of those authors who hold the opinion that creating a pneumoperitoneum in patients with acute abdominal problems means an additional serious burden that in single cases may lead to a disaster. As evidence is lacking, the current extension of laparoscopy into the field of intensive care medicine is still a human experiment that must be performed with high responsibility, extensive monitoring, and according to the rules of a clinical study.

Abdomen, Acute↗

Disasters of endoscopic surgery and how to avoid them: error analysis.

For every innovation there are two sides to consider. For endoscopic surgery the positive side is more comfort for the patient, and the negative side is new complications, even disasters, such as injuries to organs (e.g., the bowel), vessels, and the common bile duct. These disasters are rare and seldom reported in the scientific world, as at conferences, at symposiums, and in publications. Today there are many methods for testing an innovation (controlled clinical trials, consensus conferences, audits, and confidential inquiries). Reporting "complications," however, does not help to avoid them. We need real methods for avoiding negative failures. The failure analysis is the method of choice in industry. If an airplane crashes, error analysis starts immediately. Humans make errors, and making errors means punishment. Failure analysis means rigorously and objectively investigating a clinical situation to find clinical relevant information for avoiding these negative events in the future. Error analysis has four important steps: (1) What was the clinical situation? (2) What has happened? (3) Most important: Why did it happen? (4) How do we avoid the negative event or disaster in the future. Error analysis has decisive advantages. It is easy to perform; it supplies clinically relevant information to help avoid it; and there is no need for money. It can be done everywhere; and the information is available in a short time. The other side of the coin is that error analysis is of course retrospective, it may not be objective, and most important it will probably have legal consequences. To be more effective in medicine and surgery we must handle our errors using a different approach. According to Sir Karl Popper: "The consituation is that we have to learn from our errors. To cover up failure is therefore the biggest intellectual sin.

Clinical Trials as Topic↗

Pregnancy: A contraindication?

According to David L. Sackett evidence-based medicine is the conscientious, explicit, and judicious use of current best evidence when making decisions about the care of individual patients. It means integrating individual clinical expertise with the best available external evidence from systematic research. On the basis of this idea in medicine the following communication summarizes and evaluates current statements and literature on laparoscopic surgery during pregnancy. The topic is an example for excellent individual clinical performance on one hand, as gynecologists have perform laparoscopic procedures during pregnancy for decades. On the other hand, pregnancy is considered to be a contraindication for laparoscopic surgery by clinicians, because no excellent external evidence from systematic research is available. To find an answer to the question of whether pregnancy is a contraindication for laparoscopic surgery we performed a literature search and gained information by conducting interviews with several experts in gynecology and endoscopic operations. We concluded that there are almost no "scientific" data about endoscopic surgery during pregnancy, but gynecologists representing the "real world" seem to have no fear of the procedure for their patients. Between the two extremes, performing laparoscopic operations during pregnancy might be advantageous for maximal patient-friendly surgery, but considering pregnancy as a contraindication for the laparoscopic approach might be the safer treatment. The reader may decide that the subject on endoscopic surgery in pregnancy is still open.

Appendectomy↗

Combined abdominal wall paresis and incisional hernia after laparoscopic cholecystectomy.

A case of combined abdominal wall paresis and incisional hernia after laparoscopic cholecystectomy is reported. The paresis possibly occurred by a lesion of the N. intercostalis when extending the incision for stone extraction. Possibly the paresis was a predisposing factor for the development of an incisional hernia. The causes of abdominal wall paresis are explored with a review of the literature. In spite of minimal trauma to the anterior abdominal wall in laparoscopic procedures, the risk of iatrogenic lesions remains.

Abdominal Muscles↗

Color duplex sonography: diagnostic tool in the differentiation of inguinal hernias.

We investigated the accuracy of combined physical and color duplex sonographic examination in the preoperative distinction of direct inguinal hernias. After a learning period (with 15 male patients) 50 consecutive male patients who underwent surgery in our department for small inguinal hernias between July 1995 and April 1996 were examined. On color duplex examination the relationship between the hernial sac and the inferior epigastric artery was determined. Intraoperative results were then compared with the data obtained preoperatively. The sensitivity of our physical examination for direct inguinal hernia was 75% with a specificity and a positive predictive value of 100% and a negative predictive value of 80%. The identification of the IEA as well as the hernial sac was successful on every color duplex sonographic study. The sensitivity of color duplex sonography for direct inguinal hernias amounted to 90%, the specificity was 86%, the positive predictive value was 78%, and the negative predictive value was 89%. Both combined hernias found intraoperatively had not been detected either by physical examination or by color duplex examination. Correspondence of results obtained by physical examination and color duplex examination leads to high accuracy in the diagnosis of direct inguinal hernias.

Adult↗

[Evaluation of qualification regulations for medical faculties of German universities and recommendations for standardization].

The original reason for using the German "Habilitation" degree to mean that a candidade had qualified and could conduct research and teach at a university is no longer really valid, as this is being threatened by its importance to further careers. Medical faculties must discuss how this development can be curtailed. In order to check the current situation, the Habilitation degree systems of 36 medical faculties of German universities were compared with the aid of a scoring system. They differed dramatically. Conformity existed only in the demand for a doctoral dissertation, scientific publications and a lecture on approval. Concerning other criteria for qualification there was decreasing consensus in the following order: Habilitation thesis, commitment to teaching, further professional education, participation in congresses, inaugural lecture, qualification to teach, scientific activity, broad background in the discipline, and introduction to the faculty. Application of the scoring system with a maximum of 33 score points resulted in a mean value of 15.2 points and a range from 6 to 29 points. A significant decrease in the score values occurred with increasing age of the Habilitation degree (P = 0.002). Even if scoring systems are ambiguous and unfair, our analysis revealed serious differences in the quality of the Habilitation degree. Presuming that the German Habilitation degree should be maintained as a high-level qualification, we developed proposals that might be used to standardize this academic examination.

Curriculum↗

Laparoscopic colorectal resection for diverticulitis.

This study evaluated outcome in patients undergoing laparoscopically assisted sigmoid resection for diverticular disease. A total of 29 consecutive patients were treated surgically for colonic diverticulitis; in 27 of these laparoscopy was performed. The review of medical records from a control group of 34 patients undergoing open resection were used for comparison. The conversion rate was 7.5%. Using the laparoscopic technique the duration of surgery was longer (165 vs. 121 min, P < 0.05), blood loss less (182 vs. 352 ml, P < 0.05), and subsequent blood transfusion less (0 vs. 61%). The incidence of complications following laparoscopic resection was lower (two anastomotic leakages, two wound infections) than in the conventional group. Convalescence in the laparoscopic group was more rapid and hospital stay shorter (7.9 vs. 14.3 days, P < 0.05). In the laparoscopic group patients expressed less pain at rest and in motion. The cost of the laparoscopically assisted procedure was less than that of conventional resection (7185 vs. 8975 DM). In this series laparoscopically assisted sigmoid resection for diverticulitis proved safe. Recovery was faster, hospital stay was shorter, and patients expressed less pain than in conventional open surgery.

Adult↗

Prevalence of fecal incontinence: what can be expected?

Fecal incontinence is a serious problem especially for the elderly. The epidemiology of incontinence is not well described in the literature although it is often used as an endpoint for treatment evaluation in clinical trials. Complete continence is often assumed to be the "normal" standard. The goals of this study were to establish detailed prevalence rates for fecal incontinence in a standard population and to identify differences due to age and sex. A questionnaire about fecal incontinence and its consequences with predefined answers was filled out anonymously by 500 volunteers. The study population was selected to meet the respective age and sex distribution of the German adult population. The data indicated that 4.8% of the persons were unable to control solid stools, while 19.6% had problems at least with one type of incontinence (solid, pasty, or lipid stools, winds). Problems with pasty or liquid stools are more frequent in women. The ability to control wind is decreased in elderly persons. The time needed to reach a toilet is shorter for women, and generally decreases in the elderly. Men more often describe soiling the underwear. Persons with signs of incontinence show decreased levels of social activities. A global incontinence rate of 5% fits well with some previously published results. Soiling of the underwear is not well suited for defining incontinence. The increased rate in women may in part be explained by morphological differences. The reduced time to hold stools especially in the elderly in combination with a reduced mobility may result in a higher rate of incontinence, which is correlated with reduced social activities.

Adolescent↗

Conceptional and structural conditions for successful clinical research.

The efficiency of surgical research has again become the subject of debate. Clinical research is required to improve our understanding of surgical disorders and our ability to treat patients. This involves both experimental research (research in the test tube) and clinical research in actual patients. The surgeon must remain the expert because it is he who deals with the patient and is confronted with his problems. On the other hand, care for the patient, must always be the central issue. Here a new orientation is needed, evaluating the effectiveness of surgical research from the patient's point of view. Surgical treatment, particularly surgical research, must be adapted first to the individual patient and only secondly to the surgical disease - the problem must determine the method, not vice versa. While it is clear that a creative atmosphere, supportive structure and efficient organisation are enormously helpful, today's exaggerated attention to matters of structure and organisation are often poor substitutes for creativity and intuition. Surgical research does not refer solely to therapy research but includes methods for carrying out controlled clinical trials, establishing guidelines and scores and designing instruments for measuring outcome. Socioeconomic and analyses and ethical considerations are crucial for facing such conflicts as "quality versus quantity", "profession versus business", "patient care versus economics costs". Proposals for designing more effective concepts, structure and organisation for clinical research are presented here, and three models are introduced: the cooperation model, the integration model and a mixture of the two.

Follow-Up Studies↗

Early results of a prospective multicenter study on 500 consecutive cases of laparoscopic colorectal surgery. Laparoscopic Colorectal Surgery Study Group (LCSSG).

BACKGROUND: Prospective randomized multicenter studies comparing laparoscopic with open colorectal surgery are not yet available. Reliable data from prospective multicenter studies involving consecutive patients are also lacking. On the basis of the personal caseloads of specialized surgeons or of retrospective analyses, it is difficult to judge the true effectiveness of this new technique. This study aims to investigate the results of laparoscopic colorectal surgery in consecutive patients operated on by unselected surgeons. METHODS: This observational study was begun August 1, 1995, in the German-speaking part of Europe (Germany and Austria) and 43 centers initially agreed to participate. All consecutive cases were documented. All data were rendered anonymous. Analysis was performed on an intention-to-treat basis. The study committee was blinded to the participating center. RESULTS: By the end of the 1st year, 500 patients (M:F ratio 0.83, mean age 62.9 years) had been treated by 18 centers; 269 operations were performed for benign indications and 231 for cancer (palliative and curative). Most operations were done on the distal colon or rectum. An anastomosis was performed in 84%, with an overall leakage rate of 5.3% (colon 3.6% and rectum 11.8%), which required surgical reintervention in 1.7%. The mean operating time was 176 min and showed a decreasing tendency over the period under study. The conversion rate was 7.0% and the overall complication rate 21.4%. The reoperation rate was 6.6%; the most common cause was bleeding. There was one ureteral lesion (0.2%), but urinary tract infections were fairly common (4.8%). A postoperative pneumonia was diagnosed in 1.6% of the cases. No thromboembolic complications were reported. The 30-day mortality rate was 1.4% and overall hospital mortality 1.8%. CONCLUSIONS: Laparoscopic colorectal operations are still rare (about 1% of all colorectal operations in Germany). Laparoscopic procedures are more common on the left colon and rectum than on the right colon. The surgical complication rate is acceptable, comparable with rates reported by others for open surgery. Cardiopulmonary and thromboembolic complications were rarely seen. Mortality and surgical morbidity rates do not differ significantly among participating centers. A learning curve, reflected by a shortening of the operating time and a somewhat lower conversion rate, was observed over the observation period.

Aged↗