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The purpose of this study was to evaluate changes in systolic arterial blood pressure (SABP) immediately after collection of blood for transfusion in retired racing Greyhounds. We prospectively evaluated 19 blood donor Greyhounds before and after the collection of a unit (450 mL) of blood. The SABP was measured with Doppler in the right forearm after the dogs had been in the blood collection room for a few minutes (PRE-FLOOR) and again 5-10 minutes after the dogs were placed on the table where they would be bled (PRE-TABLE). A total of 3-5 minutes after completing the blood collection, the SABP was measured again while the dogs were still in lateral recumbency on the table (POST-TABLE) and once more 60-90 minutes later, when the dogs were on the floor after completing the donation (POST-FLOOR). All dogs were monitored for clinical signs of hypotension, including depression, weakness, collapse, and pallor, for a minimum of 2 hours after donation. There was a significant difference in SABP for the group between PRE-FLOOR and POST-TABLE (P = .02) and between PRE-TABLE and POST-TABLE determinations (P = .01). There were no significant differences for any of the other time points; there were no adverse events. Therefore, we conclude that the collection of 450 mL of blood from normal Greyhounds results in a short-lived yet significant decrease in SABP, but the likelihood of adverse events is negligible.
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PMID:Effects of blood donation on arterial blood pressure in retired racing Greyhounds. 1635 13

A six-month-old, entire female, Irish setter was presented with a two-month history of progressive hindlimb weakness and collapse on exercise. Thoracic auscultation revealed a soft systolic murmur and a split second heart sound. Differential cyanosis and polycythaemia were not observed. Right-to-left shunting patent ductus arteriosus (r-PDA) was confirmed on contrast echocardiography ("bubble study") and selective right ventricular angiography. Comparison of blood gases from the metatarsal and auricular artery confirmed the presence of differential hypoxia. This technique is not known to have been described previously in the diagnostic investigation of r-PDA in dogs.
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PMID:Original investigation of right-to-left shunting patent ductus arteriosus in an Irish setter puppy. 1644 21

We describe a case of chronic renal failure developing life-threatening cardiovascular collapse during the insertion of central venous catheter for hemodialysis under general anesthesia in a 7-year-old boy. With timely resuscitation, he regained his vital signs within 20 min. However, after admission to the pediatric intensive care unit, visual impairment and four limb weakness were detected on the first postoperative day. Fortunately, symptoms resolved completely with close observation, psychological support and conservative management within 72 h without sequelae.
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PMID:Transient cortical blindness after resuscitation in a child having central venous catheterization under general anesthesia. 1649 98

Tracheobronchomalacia (TBM) and excessive dynamic airway collapse (EDAC) are both dynamic forms of central airway obstruction characterized by a decrease of >/=50% in the cross-sectional area of the tracheobronchial lumen. The differences between these two entities, however, are not uniformly accepted in the medical community. While TBM is characterized by a weakness of the tracheobronchial cartilaginous structures, EDAC is marked by excessive bulging of the posterior membrane into the airway lumen during exhalation. These disease entities are probably underdiagnosed because they present with a variety of nonspecific symptoms similar to patients with other obstructive ventilatory disorders such as asthma and COPD. Diagnosis is confirmed by dynamic radiologic imaging studies or bronchoscopy. Current therapeutic management depends on the extent, type, and severity of airway abnormalities noted and the clinical presentation. Proposed management alternatives include conservative medical therapy, and minimally invasive and open surgical interventions. Inhaled bronchodilators should be used only if symptoms and ventilatory function improve after use. Continuous positive airway pressure acts as a pneumatic stent and should be considered as an alternative or additional therapeutic modality. Endoluminal stent insertion can improve symptoms and pulmonary function in patients with central airway obstruction and should be considered for patients with symptoms refractory to conservative therapy. Several open surgical procedures have also been performed over the years, including tracheostomy, airway splinting, tracheal resection and, more recently, external tracheal stents. Endobronchial laser therapy, resorbable stents, application of grafting materials used to support the collapsed airway as well as the use of cartilage regeneration techniques are experimental, and their efficacy in humans remains to be determined. Future studies should compare therapeutic interventions and outcomes such as functional status, ventilatory function, and bronchoscopic and radiologic appearances in order to define the costs and benefits of individual and combined treatment modalities.
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PMID:Treatment of adult tracheobronchomalacia and excessive dynamic airway collapse : an update. 1651 91

Spinal tuberculosis is usually secondary to lung or abdominal involvement and may also be the first manifestation of tuberculosis. Spinal tuberculosis (often called Pott's disease) is by definition, an advanced disease, requiring meticulous assessment and aggressive systemic therapy. Physicians should keep the diagnosis in mind, especially in a patient from a group with a high rate of tuberculosis infection. This review aims on updating the knowledge on spinal tuberculosis and its management. Skeletal involvement has been reported to occur in approximately 10% of all patents with extrapulmonary tuberculosis, and half of these patients develop infection within the spinal column. Symptoms of spinal tuberculosis are back pain, weakness, weight loss, fever, fatigue, and malaise. It is much more prone to develop neurological manifestation, paraplegia of varying degree. The palpation of spinous process in routine clinical examination is the most rewarding clinical method and is an invaluable measure for early recognition. Diagnosis of spinal tuberculosis is made on the basis of typical clinical presentation along with systemic constitutional manifestation and the evidence of past exposure to tuberculosis or concomitant visceral tuberculosis. Magnetic resonance imaging can define the extent of abscess formation and spinal cord compression. The diagnosis is confirmed through percutaneous or open biopsy of the spinal lesion. Surgery is necessary as an adjunct to antibiotic therapy if the vertebral infection produces an abscess, vertebral collapse, or neurologic compression. Some patents need aggressive supportive care owing to tuberculous meningitis or encephalopathy. Moreover, the importance of immediate commencement of appropriate treatment and its continuation for adequate duration along with the proper counseling of the patient and family members should not be underestimated for successful and desired outcome.
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PMID:Pott's spine and paraplegia. 1657 Mar 78

The occurrence, prevalence, and distribution patterns of acute bee paralysis virus (ABPV), black queen cell virus (BQCV), chronic bee paralysis virus (CBPV), deformed wing virus (DWV), Kashmir bee virus (KBV), and sacbrood virus (SBV) were investigated in 90 Austrian honeybee colonies suffering from symptoms of depopulation, sudden collapse, paralysis, or dark coloring by employing reverse transcription-PCR. Infestation with parasites was also recorded. The samples originated from all parts of Austria. The most prevalent virus was DWV, present in 91% of samples, followed by ABPV, SBV, and BQCV (68%, 49%, and 30%, respectively). CBPV was detected in 10% of colonies, while KBV was not present in any sample. In most samples, more than one virus was identified. The distribution pattern of ABPV, BQCV, CBPV, and SBV varied considerably in the different geographic regions investigated, while DWV was widespread in all Austrian federal states. In bees that showed dark coloring and disorientation, CBPV was always detected. Simultaneous infections of DWV and ABPV were most frequently observed in colonies suffering from weakness, depopulation, and sudden collapse. Bees obtained from apparently healthy colonies within the same apiaries showed a similar distribution pattern of viruses; however, the relative virus load was 10 to 126 times lower than in bees from diseased colonies. A limited number of bee samples from surrounding central European countries (Germany, Poland, Hungary, and Slovenia) were also tested for the presence of the above viruses. Variances were found in the distribution of BQCV and SBV.
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PMID:Occurrence of six honeybee viruses in diseased Austrian apiaries. 1659 39

Scapholunate interosseal ligament tears manifested with pain, a popping, weakness of the wrist, or limited wrist motion, are probably the most frequent cause of carpal instability. Insufficiency of the injured scapholunate ligament results in pathologic scaphoid and lunate position with wrist kinematics changes that cause irreversible degenerative arthrotic changes. The timely diagnosis combined with proper treatment is required for successful therapy and carpal collapse prevention.
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PMID:[Injury of the scapholunate interosseal ligament--scapholunate dissociation]. 1683 98

Two patients, a 36-year-old female and a 36-year-old male, separately experienced new onset nausea, vomiting, diarrhea, abdominal pain, muscle weakness and pallor. Over a period of 14-16 h these symptoms continue and progress to include hypotension refractory to therapy, pulmonary edema and cardiovascular collapse. Autopsies show hemorrhagic pulmonary edema, splenomegaly and lack of anatomical cause for sudden death. Postmortem analysis, in one case post-embalming and exhumation, revealed elevated selenium concentrations and a determination of the cause of death. These two cases present several important features associated with selenium toxicity, two of which are previously unreported: (1) selenium as a potential homicidal agent, (2) the toxidrome and time frame of selenium toxicity, (3) selenium determination in exhumed, embalmed tissues, (4) postmortem urinary selenium concentration, and (5) decrease in tissue concentrations over time.
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PMID:Two fatal cases of selenium toxicity. 1689 Oct 71

Supernovae connected with long-duration gamma-ray bursts (GRBs) are hyper-energetic explosions resulting from the collapse of very massive stars ( approximately 40 M\circ, where M\circ is the mass of the Sun) stripped of their outer hydrogen and helium envelopes. A very massive progenitor, collapsing to a black hole, was thought to be a requirement for the launch of a GRB. Here we report the results of modelling the spectra and light curve of SN 2006aj (ref. 9), which demonstrate that the supernova had a much smaller explosion energy and ejected much less mass than the other GRB-supernovae, suggesting that it was produced by a star whose initial mass was only approximately 20 M\circ. A star of this mass is expected to form a neutron star rather than a black hole when its core collapses. The smaller explosion energy of SN 2006aj is matched by the weakness and softness of GRB 060218 (an X-ray flash), and the weakness of the radio flux of the supernova. Our results indicate that the supernova-GRB connection extends to a much broader range of stellar masses than previously thought, possibly involving different physical mechanisms: a 'collapsar' (ref. 8) for the more massive stars collapsing to a black hole, and magnetic activity of the nascent neutron star for the less massive stars.
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PMID:A neutron-star-driven X-ray flash associated with supernova SN 2006aj. 1694 26

This article argues that taking concepts of euthanasia out of their political and economic contexts leads to violations of the premises on which the Stoic ideal of euthanasia is based: 'a quick, gentle and honourable death.' For instance, the transplantation of the narrowly defined concept of euthanasia developed under the Dutch welfare system into a developing country, such as the People's Republic of China (PRC), seems inadequate. For it cannot deal with questions of anxiety about degrading forms of dying and suffering without reference to its economic rationale, demanded by a scarcity (unequal distribution) of health care resources. The weakness of health care provisions for the terminally ill in Mainland China has become increasingly poignant since the collapse of collective health care institutions in the countryside since the reforms of the late-1980s. As in most cases where health care facilities are wanting, it is difficult to apply the criteria of gentleness and dignity at reaching death. Its solution lies not in a faster relief from suffering by euthanasia, but in extending the quality of life through distributive justice within Chinese healthcare policy-making. This paper begins with a brief description of the Dutch euthanasia law, after which it discusses Chinese conceptions of euthanasia in biomedical textbooks, the media and in surveys. It concludes by pointing out the need for a transnational framework in which both the specifics and generalities of euthanasia can be discussed.
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PMID:Chinese concepts of euthanasia and health care. 1704 54


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