Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0030193 (pain)
 261,466 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Intravenous nitroglycerin (NG) infusion in patients with acute myocardial infarction (AMI) has been shown to improve left ventricular function and myocardial perfusion and to decrease ischemic injury and creatine kinase (CK) indexes of infarct size. To determine whether early NG infusions in patients with AMI decreases the extent of left ventricular asynergy, we used two-dimensional echocardiography to measure asynergic segments (akinesis and/or dyskinesis) at four serial short-axis levels from base to apex (mitral, M; chordal, C; midpapillary, MP; low papillary, LP) in 22 patients with a first anterior AMI. Patients were randomized between infusions of NG (n = 11) or 5% dextrose in water (controls, n = 11) within 5.6 hr after the onset of pain. NG infusion rates were titrated to lower mean arterial pressure to an average level of 7% below control (but not below 80 mm Hg) and were maintained at this level for the duration of the infusions (39 hr). After NG, left ventricular function improved as left ventricular filling pressure decreased (p less than .005), and sigma ST on precordial ST segment mapping decreased (p less than .001). These parameters did not change in control subjects. Computed CK infarct size was smaller in the NG group than in the control group (p less than .05). Before the infusions, the mean extent of left ventricular asynergy (% left ventricular circumference) were similar in both groups: M, 18% vs 21%; C, 22% vs 23%; MP, 26% vs 24%; LP, 32% vs 29%. In addition, the computed total left ventricular asynergy (% surface area) was also similar for these two groups before therapy (25% vs 25%). There was no change in left ventricular asynergy from pretreatment values by 1 hr and 10 days among control subjects: M, 18% vs 18% vs 17%; C, 22% vs 22%; MP, 26% vs 26% vs 22%; LP, 32% vs 33% vs 33%; total 25% vs 25% vs 24% (multiple measures analysis of variance). In contrast, there was a significant decrease (p less than .001) in left ventricular asynergy from pretreatment values by 1 hr and 10 days with NG: M, 21% vs 10% vs 8%; C, 23% vs 12% vs 10%; MP, 24% vs 13% vs 9%; LP, 29% vs 14% vs 10%; total, 25% vs 12% vs 9%.(ABSTRACT TRUNCATED AT 400 WORDS)
 ...
PMID:Persistent reduction in left ventricular asynergy in patients with acute myocardial infarction by intravenous infusion of nitroglycerin. 641 7

Recent studies have shown that while the analgesic responses induced by certain stressors appear to be related to morphine analgesia, the analgesic responses to other stressors do not. Para-chlorophenylalanine (PCPA), a potent tryptophan-hydroxylase inhibitor has been shown to decrease both basal pain thresholds and morphine analgesia on the flinch-jump test. To assess further the relationship between morphine and stress-induced analgesia, PCPA's effect upon the analgesic responses to cold-water swims, 2-deoxy-D-glucose, inescapable foot shock and morphine were determined using the flinch-jump and tail-flick tests. PCPA, which produced an 85% depletion of brain serotonin, significantly decreased jump thresholds while significantly increasing tail-flick latencies. Similarly, while morphine analgesia was decreased by PCPA on the flinch-jump test, it was not affected on the tail-flick test. The analgesic jump thresholds induced by cold-water swims and 2-deoxy-D-glucose as well as the increase tail-flick latencies induced by foot shock were unaffected by PCPA. These results are discussed in terms of PCPA's differential effects upon basal nociception and morphine analgesia and in terms of further dissociation between morphine and stress-induced analgesia.
 ...
PMID:Stress and morphine analgesia: alterations following p-chlorophenylalanine. 645 44

Thirty healthy women in active labour received an intrathecal injection of morphine 0.5 mg (n = 12) or 1 mg (n = 18) in 7.5% dextrose. Both doses provided excellent analgesia for labour, 93% of patients obtaining at least 50% pain relief. Analgesia began 15-60 min after injection and did not decrease until 6-8 h after injection. Analgesia was satisfactory until distension of the perineum, either by forceps or the infant's head. The intrathecal injection of morphine did not adversely affect the condition of the infant. Eighty per cent of patients developed pruritus; 53%, nausea or vomiting, or both; 43%, urinary retention; and 43%, drowsiness. These side effects were decreased by naloxone, which did not affect the degree of analgesia. There was no significant depression of ventilation in any patient. These results suggest that morphine 0.5 mg or 1 mg, administered intrathecally, effectively decreases the pain of labour, and that i.v. administration of naloxone can alleviate the common side effects.
 ...
PMID:Intrathecal administration of hyperbaric morphine for the relief of pain in labour. 654 39

The effects of site of venipuncture on the incidence of venous sequelae, utilizing a standard protocol, were assessed on 48 human subjects. Data were also recorded based on various demographic and clinical variables, including age, sex, race, vein diameter, dose, procedure time, IV fluid volume, injection pain and initial blood flow velocity. When the site of venipuncture was the antecubital fossa there was a significantly lower incidence of venous sequelae than when the venipuncture site was the dorsum of the hand, with the significant variables being venous diameter and procedure time. These findings further support the antecubital fossa as a preferred venipuncture site to the dorsum of the hand; however, there was a sufficient incidence of venous complications (37%) when the antecubital fossa was used to warrant consideration of contributory factors other than site. It appears that time of continuous infusion is a critical element and should be kept at a minimum. Also, subjects in whom Valium was injected demonstrated significantly more venous sequelae than those in whom 5% dextrose in water was injected, confirming previous reports that diazepam is irritating to the endothelial lining and thus is thrombogenic.
 ...
PMID:Incidence and extent of venous sequelae with intravenous diazepam utilizing a standardized conscious sedation technique. Part II: Effects of injection site. 658 Apr 21

Capsaicin modulates animal pain perception, increasing chemosensitive and pressure thresholds following systemic administration, increasing thermal thresholds following intrathecal administration, and decreasing electric shock thresholds following intracerebroventicular (ICV) administration. Since morphine analgesia is decreased in a dose-dependent manner following ICV capsaicin, the present study examined whether ICV injections of capsaicin (0, 25, 50, 100 micrograms) would alter other analgesic responses as well. Experiment 1 demonstrated that the analgesic response to a 450 mg/kg dose of 2-deoxy-D-glucose was significantly reduced by the 25 and 50, but not the 100 micrograms capsaicin dose. Further, while analgesia induced by cold-water swims (CWS) in a 2 degrees C bath was significantly attenuated by the 25 micrograms capsaicin dose, the entire dose range eliminated analgesia induced by CWS in a 15 degrees C bath. Experiment 2 indicated that the capsaicin-induced alterations in CWS analgesia were not attributable to parallel changes in CWS hypothermia. Experiment 3 demonstrated that capsaicin failed to alter both the non-opioid analgesic response induced by 20 inescapable foot shocks (FS) and the opioid analgesic response induced by 80 FS. These data are discussed in terms of the similarities to and/or dissimilarities from capsaicin-induced effects upon morphine analgesia.
 ...
PMID:Capsaicin treatment and stress-induced analgesia. 668 8

Neonatal administration of monosodium glutamate (MSG) produces in rats neurotoxic degeneration of the circumventricular system, including the medial-basal hypothalamus, depleting several neuropeptides and neurotransmitters in this area. In addition, a number of behavioral and neuroendocrine responses are impaired, including a significant decrease in the analgesic response to cold-water swims (CWS). The present study examined whether the alterations in the analgesic responses following CWS and 2-deoxy-D-glucose (2-DG) induced by neonatal MSG treatment were due either to direct alterations in a pain-inhibitory system, or alternatively, to alterations in a system that processes the stressful consequences or properties of a stimulus. To accomplish this, the analgesic, hypothermic, and locomotor responses following CWS and the analgesic, hyperphagic, and locomotor responses following 2-DG were assessed in rats treated neonatally (days 2, 4, 6, 8, and 10) with either MSG or a vehicle solution. MSG-treated rats displayed significant reductions in both their analgesic and hypothermic responses following CWS, suggesting that MSG treatment impairs an animal's ability to process sufficiently the stimulus properties of the swim as stressful. While MSG treatment potentiated 2-DG analgesia, it reduced 2-DG hyperphagia, suggesting that MSG treatment also impairs coping responses to glucoprivation. These data indicate the importance of the circumventricular system in the coding of stimuli as potential stressors and in the subsequent activation of requisite systems necessary to provide a sustained, coordinated, and synchronous coping response.
 ...
PMID:Impairments in analgesic, hypothermic, and glucoprivic stress responses following neonatal monosodium glutamate. 673 8

Seventeen patients received morphine 0.2 mgkg-1 in a 10% dextrose solution i.m. (n = 5), extradurally (n = 6) and intrathecally (n = 6) for pain after operation. Morphine was measured in plasma by radioimmunoassay. Plasma immunoreactive morphine concentration was significantly less after intrathecal administration after i.m. and extradural administration (P less than 0.05) at 2, 10, 15 and 30 min. We conclude that morphine given extradurally has a greater initial rate of vascular absorption than morphine given intrathecally and is similar to that observed after i.m. administration.
 ...
PMID:Plasma concentration of morphine after i.m., extradural and intrathecal administration. 689 80

Eighteen patients received morphine 0.2 mg kg-1 in 0.9% saline i.m. (n = 6), extradurally (n = 6), or in a 10% dextrose solution intrathecally (n = 6) for pain relief operation. Plasma unmetabolized morphine was isolated by extraction using liquid-solid chromatography and measured by radioimmunoassay. Conjugated morphine was calculated from the difference between total immunoreactive morphine and unmetabolized morphine. Initial vascular absorption was significantly less in the intrathecal group than in the i.m. and extradural groups. This accounts for persistence of plasma unmetabolized morphine at 24 h and for more prolonged analgesia in the intrathecal group. Prolonged analgesia observed following extradural and intrathecal administration was caused by a small quantity of unmetabolized morphine. Extradural and i.m. groups showed the same pharmacokinetic patterns although extradural analgesia is much more prolonged. Morphine glucuronide appeared later in blood in the intrathecal group than in the two other groups.
 ...
PMID:Plasma pharmacokinetics of morphine after i.m., extradural and intrathecal administration. 689 49

Twenty-four periodontal patients volunteered for a study designed to investigate the incidence of venous sequelae with Injectable Valium administered by a standardized conscious sedation technique. Sedative doses were injected into veins on the dorsum of the hand utilizing a continuous infusion drip of 5% dextrose in water. Postoperative evaluation extended over 12 weeks. Ultrasonic tests for thrombosis were performed with a Doppler Flowmeter. Independent variables considered included age, vein size, volume of drug, volume of intravenous solution, pain upon injection and initial venous flow velocity. Sixteen subjects (66.67%) experienced some form of venous sequelae. Thirteen sequelae advanced to thrombophlebitis. Those subjects who demonstrated no complications had significantly higher initial venous flow than those with complications. Those subjects with resolution of complications demonstrated a significantly greater initial venous flow than those without resolution of complications. Clinical variables of pain on injection, vein diameter, dose of diazepam and volume of infusion solution did not significantly differ across groups. However, those subjects with no complications were significantly older than those with complications. It is recommended that the larger veins of the forearm and antecubital fossa, with greater mean velocities of venous flow, be preferred for intravenous diazepam administration to attempt to decrease the nature and incidence of thrombophlebitis.
 ...
PMID:Incidence and extent of venous sequelae with intravenous diazepam utilizing a standardized conscious sedation technique. 696 Jan 68

Ketamine hydrochloride 4 mg in 10 ml 5% dextrose water was administered epidurally to 7 patients suffering from intractable pain in the back, lower abdomen and legs. Pain relief was obtained in all cases. The duration of action varied from half an hour to more than 6 hours. No adverse side-effects were noted and no detectable neurological damage resulted. Intraspinal ketamine offers and advantage over the opiates, in that respiratory depression is unlikely to occur.
 ...
PMID:Epidural ketamine. A preliminary report. 706 21


<< Previous 1 2 3 4 5 6 7 8 9 10 Next >>