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Biomedical subjects

B Schockenhoff

Publications and source records attributed to B Schockenhoff.

At least 19 recordsLinked to original sources

[Cerebrovascular abnormalities in pregnancy].

A 37-year-old pregnant woman without neurological history was admitted in the 21st week of pregnancy for multiple seizures. Angiography confirmed the diagnosis of cerebral angioma. The patient decided to continue with her pregnancy; caesarean section under regional anesthesia via an epidural catheter was uneventful. Five weeks later the angioma was resected after sudden recurrence of seizures and neurological deterioration. In this report, the therapeutic options for elective neurosurgical intervention after possible termination of pregnancy, during pregnancy, or after delivery are discussed including anesthesiological management during delivery.

Adult↗

[Analgosedation of the ventilated intensive care patient].

Seven different schemes for analgesic anaesthesia were investigated for their clinical applicability, potential side effects, and impacts on circulation parameters of the systemic and pulmonary (peripheral) circulation as well as on the intracranial pressure. In all, so patients per group were treated. The results revealed different reactions of patients, such as a higher incidence of disturbances of the autonomic nervous system and excitation after medication withdrawal. Favourable effects not only on clinical reactions but also on circulation parameters were seen during fentanyl/midazolam or alfentanil/midazolam therapy. In several instances, a clear increase in the right atrial and the pulmonary arterial mean pressure as well as the intracranial pressure was observed during ketamine/flunitrazepam therapy. The combinations pethidine/promethazine or pethidine/flunitrazepam also showed clear side effects on the circulation and evoked an increase in the intracranial pressure. Fentanyl/midazolam or alfentanil/midazolam treatments were the most favourable combinations for most of the patients who were artificially respirated.

Adolescent↗

[Arousal in various analgosedation schedules].

The patterns of recovery of patients who received seven different analgesic and sedative treatments were investigated with regard to the time at which the subjects awoke. For observations of the neurologic status, we developed a special score. The analgesic and sedative therapies were given at three various doses. The combination of fentanyl/midazolam, alfentanil/midazolam and ketamine/flunitrazepam showed the best results. Piritramid/promethazine, pethidine/flunitrazepam, pethidine/promethazine and tramadol/methohexital required more time for awakening. On the basis of these results, we prefer to use the combination of fentanyl/midazolam, alfentanil/midazolam and ketamine/flunitrazepam to judge all patients' neurologic scores.

Analgesia↗

Opioid analgesia in extracorporeal shock wave lithotripsy: fentanyl versus alfentanil.

More than 1,600 patients have been treated by extracorporeal shock wave lithotripsy (ESWL) under fentanyl analgesia without any complications or severe side-effects. As secondary respiratory depression is still under discussion, we investigated the value of alfentanil--a short-term acting opioid--with special interest in its efficacy and side-effects. Neither fentanyl nor alfentanil significantly influenced blood pressure, respiratory rate and blood gases. With regard to minor side-effects and patient's acceptance, alfentanil analgesia should be preferred during ESWL treatment.

Alfentanil↗

[Comparative studies of the postoperative phase following opioid analgesia using fentanyl and alfentanil within the scope of extracorporeal shockwave lithotripsy].

30 patients (ASA Class I-III) received opioid analgesia with fentanyl and alfentanil for extracorporeal shock wave lithotripsy. Average doses were 0.41 mg for fentanyl and 4.14 mg for alfentanil. Blood pressure, respiratory frequency, and blood gases were investigated postoperatively until the 240th min under spontaneous breathing of room air. Blood pressure varied less than 10% from initial values in both groups. The respiratory rate decreased by 13% in the alfentanil group and by 20% in the fentanyl group until the 120th min. The blood gases (paCO2, paO2) showed a slow increase of about 10% in the paCO2 in both groups. The paO2 lay at 5.8% below the baseline after 240 min in the fentanyl group and there was roughly 3% below the baseline after 60 min in the alfentanil group.

Alfentanil↗

[Anesthesiologic aspects of extracorporeal shockwave lithotripsy (ESWL)].

Anesthesiological considerations are discussed on the basis of the limited literature available and our own experience with more than 2000 ESWL treatments. Guidelines concerning anesthesia technique and ESWL treatment of renal and ureteral stones are outlined and compared to our own results and those in the literature. The following techniques are discussed: intubation anesthesia with halogenated carbohydrogens (Fluothane, Ethrane), intubation anesthesia with Fluothane/Ethrane plus opiates, neuroleptic anesthesia, catheter peridural anesthesia (lumbar/thoracic), opiate analgesia and high frequency jet ventilation.

Analgesics, Opioid↗

[Omphalocele and gastroschisis: problems in intensive medical treatment].

Aetiologically and pathognomically, omphalocele and gastroschisis are different forms of occlusive disorders in the anterior abdominal wall of newborns. Their prognosis has clearly improved in recent years, owing to progress in surgical and conservative treatment, primarily on account of improved intensive medical care of the children concerned. Courses and survival rates of newborns with either malformation have proved to depend strongly on the initial condition of the patients. The authors' own studies, in agreement with most of the literature, have shown that the incidence of severe syndromes of malformation has been comparatively high among newborns with omphalocele, whereas children with gastroschisis are usually small-for-date newborns with low birth weight. This has been a frequent limitation to successful treatment. Major importance, in terms of intensive medical treatment, should be attributed to postoperative completely parenteral feeding, throughout the early postsurgical phase during which the patient is particularly endangered from recurrent disorders of passage, as well as to artificial respiration due to respiratory constraint on account of elevated diaphragm and disproportionality between the abdominal cavity and retroposed viscera. Early administration of amino acids, carbohydrates, fat, trace elements, immunoglobulins, and vitamins, with doses being systematically increased by a prespecified pattern, has proved to be necessary to counteract catabolism accompanied by somewhat severe disorders in wound healing, subacute obstruction, and massive attacks of septic infections. This is possible only through central venous catheterization. Resulting thrombotic or septic complications may be mitigated by partial heparinization of the children.(ABSTRACT TRUNCATED AT 250 WORDS)

Abdominal Muscles↗

[Intracranial pressure and circulatory parameters with positive end-expiratory pressure (PEEP). The possibility of drug modification].

In patients who have head injuries as well as injuries involving other organ systems, especially those of the thorax and upper abdomen, conflict can arise between the need to ensure adequate ventilation and the simultaneous need to protect the brain against further increases in intracranial pressure. Positive end-expiratory pressure (PEEP) ventilation, in particular, is suspected of causing the intracranial pressure to rise. Our study of the effects of a combination of anaesthetics on animals, was designed to investigate whether, the negative effects of PEEP ventilation on both intracranial pressure and on various circulatory parameters could be prevented. In animals with normal intracranial pressure at the outset of the experiment, during PEEP ventilation at pressures of up to 12 cmH2O, neither clinically significant rises in intracranial pressure, nor notable changes in circulatory parameters occurred. In comparison, those animals with artificially raised intracranial pressure showed marked differences with respect to their tolerance of PEEP ventilation. Whereas ventilation with an oxygen/nitrous oxide mixture caused a distinct elevation of the intracranial pressure and the deterioration of circulatory parameters, a combined regimen of etomidate and alfentanil under ventilation with an oxygen/air mixture minimized the negative effects of PEEP. Gradual increases in PEEP were tolerated better than a rapid rise in PEEP. With appropriate drug therapy, it is therefore possible to maintain PEEP ventilation in the presence of raised intracranial pressure without causing deterioration of the circulatory situation, or exacerbating the problems of intracranial pressure or cerebral perfusion pressure.

Anesthesia↗

[Alfentanil for neuroleptanesthesia in short operations].

Alfentanil, a potent short acting analgetic, is used for short operations instead of fentanyl as a neurolept anaesthesia agent. The action of this form of anaesthesia is described. As initial dose of alfentanil we used 25 micrograms/kg b.w. The total dose of alfentanil for operations of about 30 min on average was 40 micrograms/kg b.w. Blood pressure, heart rate and side effects of this form of anaesthesia have been investigated.

Adolescent↗

[Experiences with a new double-lumen venous catheter in anesthesia and intensive care medicine].

A new double-channelled catheter with one main lumen and one accessory small lumen is described. The different ranges of application and the advantages are discussed. Flow rates through the two channels are measured and compared with the well-known "Cavafix"-system. Reactions of incompatibility and possible changes in efficacy of drugs and infusions can be provided with this kind of central venous catheter.

Anesthesia, Intravenous↗

[Use of etomidate within the scope of neurosurgery].

The effect and the applications of Etomidate pro infusion (125 mg/ml) are discussed under special consideration of neurosurgical patients. Besides the application for anaesthesia, the administration of Etomidate pro infusion in the intensive-medical range for sedation, reduction of cerebral pressure and as an anticonvulsant is dealt with. The possibility of an adrenal insufficiency under the action of Etomidate pro infusion is discussed on the basis of the literature controversial to this subject.

Anesthesia, Intravenous↗

[Amrinone in catecholamine refractory heart failure in septic shock].

The effect of the new positive inotropic and vasodilatator bipyridine-derivate Amrinon on catecholamine-refractive heart insufficiency in septic shock is described. A bolus dose of 1 mg/kg b.w., followed by continuous infusion of Amrinon 10 micrograms/kg b.w./min improved the haemodynamic parameters of all seven patients. The severe tachycardia before therapy was diminished more than 30%, the blood-pressure increased about 25-30%. RAP, PAP and PCWP showed a diminution of 35-45%. The cardiac output increased nearly 100% under therapy. All patients had IPPV with high inspiratory oxygen concentration, with inversed-ratio-ventilation and high positive end-expiratory pressure. Under Amrinon-therapy the initial pulmonary insufficiency diminished. The oliguria/anuria existing before Amrinon-therapy was improved also. Amrinon was given over 24-36 hours, the total dose was between 800 and 1440 mg. Six of the seven patients survived their severe illness; one patient died of pulmonary embolism, confirmed by autopsy, four weeks after Amrinon-therapy.

Adult↗

[Use of alfentanyl in short-term anesthesia. Initial results].

The administration of the new opiate-analgetic alfentanil in combination with etomidate supplemented by N2O/O2 for short anaesthesia is described. The influence on blood pressure, heart rate, paO2, paCO2, rate-pressure-product (RPP) and glucose rate has been investigated. In the intraoperative and early postoperative period, the cardiac and respiratory system was unchanged. After anaesthesia all patients were very cooperative.

Adjuvants, Anesthesia↗

[Etomidate as an anticonvulsive agent].

Experiences with etomidate as an agent with hypnotic, brain protective and anticonvulsive effects are discussed. The application of etomidate is described at one patient with epilepsy and withdrawal symptoms after resuscitation.

Alcoholism↗

[Therapy of alcohol withdrawal delirium with a new hypnotic].

The treatment of alcohol withdrawal symptoms which suddenly appear after an operation, is discussed. Therapy with etomidate as long term sedation is described. 500 mg of etomidate (125 mg circumflex or equal to 1 ml) soluted in 50 ml physiological saline was given by perfusor (0.6 - 0.8 mg/kg b.w./h). Therapy-time lasted from 48 - 56 hours. The influence on respiration, circulation and laboratory report was investigated. We discuss the comparison in the advantage and disadvantage of this therapy to other medications.

Adult↗