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Query: UMLS:C0010200 (cough)
 23,843 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The cough reflex elicitability (CRE), cough reflex strength (CRS) and Hering-Breuer inflation reflex (HBIR) were studied in 51 anaesthetized (Pentobarbital Spofa, 30 mg/kg, i.v.) female rabbits 24-h and 48-h after SO2 breathing. To provoke cough, the interior of the trachea and carina were stroked with a polyethylene catheter. To elicit the HBIR, the lungs were inflated to 1.0 kPa intratracheal pressure. Intrapleural and systemic blood pressures were recorded. The CRE, CRS and HBIR obtained 24-h and 48-h after SO2 breathing were compared with correspondent values of control animals. It was found, that CRE and HBIR were fully recovered 24-h after SO2 breathing, but the CRS was still decreased, however, there were no significant differences in CRE, CRS and HBIR between animals 48-h after SO2 breathing and control animals. It can be concluded, that decrease of the CRS 24-h after SO2 breathing is not due to slowly adapting stretch receptors block of airways.
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PMID:Cough reflex in rabbits 24-h and 48-h after sulphur dioxide breathing. 192 42

In order to determine the possible involvement of GABA-ergic mechanisms in the modulation of the cough reflex, the effects of GABA antagonists on the pentobarbital-induced depression of respiration and cough were examined in a comparative study in rats. The cough reflex was induced by application of electrical stimulation to the tracheal mucosa by the puncture electrode-induced cough method. The 50% antitussive dose (AtD50) of pentobarbital was calculated by the "up and down" method. Pentobarbital (10 mg/kg, IP) caused a reduction of tidal volume, which was counteracted by pretreatment with picrotoxin (3 mg/kg, IP) or bicuculline (3 mg/kg, IP). However, neither picrotoxin nor bicuculline were able to counteract the reduction in frequency of respiration. The AtD50 of pentobarbital was 1.95 mg/kg when administered IP. The AtD50 of pentobarbital was not altered after pretreatment of rats with picrotoxin (1.85 mg/kg, IP) or with bicuculline (1.55 mg/kg). These results suggest that GABA-ergic mechanisms may not be involved in the cough-depressant effect of pentobarbital.
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PMID:Effects of GABA antagonists on the pentobarbital-induced depression of respiration and cough in rats. 254 92

The authors studied parameters of laryngopharyngeal (LPh) and tracheobronchial (TB) cough (the number of efforts--NE, the number of efforts per minute--NE.min-1, the intensity of the maximum effort--IME and the intensity of the attack--IA), respiratory parameters (VT, f, Cdyn), blood gas values (PaO2, PaCO2) and the pH in the arterial blood of anaesthetized cats (Pentobarbital Spofa, 35 mg x kg-1 i.p. with experimental pulmonary oedema. Oedema was induced by the i.v. administration of a fatty acid mixture (capric acid 3.8 g, caprylic acid 3.1 g and olive oil 3.0 g)--in a dose of 0.05 ml x kg-1 in group 1 and of 0.01 ml x kg-1 in group 2. Cough was elicited by stimulating the laryngopharyngeal and tracheobronchial mucosa with a silon fibre. Pulmonary oedema was determined from a macroscopic and microscopic examination of the lungs, from the ratio of lung weight to body weight and from the percentual dry weight of the right lungs. The authors found that the intensity of cough was depressed during pulmonary oedema, particularly in the case of TB cough. VT and Cdyn fell, f rose and the PaO2 and pH values steadily decreased.
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PMID:Study of cough in anaesthetized cats with experimental pulmonary oedema. 295 May 32

Too little is known of the mechanisms participating in the regulation of defence reflexes of the organs of respiration. The activity of respiratory tract--in particular lung stretch and cough receptors--may play an important role. In the present study the authors investigated the effect of short-term inflation of the lungs, during which lung stretch receptors are mainly stimulated, on the expiration reflex, which is one of the respiratory defence reflexes. The experiments were carried out on 18 rabbits (2.5-2.8 kg) under general anaesthesia (Pentobarbital Spofa, 30 mg.kg-1 i.v.). The VT, V', Ppl and systemic BP were recorded. The expiration reflex was elicited by stimulating the vocal folds with a silon fibre loop during resting respiration and during inflation of the lungs with pressures of 0.49, 0.98 and 1.47 kPa. The criterion of the intensity of the expiration reflex was the Ppl expressed in kPa. The authors found that the intensity of the expiration reflex during resting respiration was 0.29 +/- 0.02 kPa (S.E.M.). An inflation pressure of 0.49 kPa raised it to 0.69 +/- 0.06 kPa, a pressure of 0.98 kPa raised it still further to 1.12 +/- 0.06 kPa and a pressure of 1.47 kPa raised it yet again to 1.59 +/- 0.08 kPa. In the authors' opinion, the increase in the intensity of the reflex is due to augmented activity of lung stretch receptors.
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PMID:Modification of the intensity of the expiration reflex during short-term inflation of the lungs in rabbits. 621 57