Powerful 3-μm lasers acousto-optically Q-switched with KYW and KGW crystals.

We report, to the best of our knowledge, the first use of KY(WO) and KG(WO) acousto-optical Q-switches in 3-μm powerful lasers. Q-switches of two different designs (normal incidence with antireflection coatings, and Brewster-angle cut crystals) operate in lasers based on Er:YAG, Cr:Yb:Ho:YSGG, and Cr:Er:YSGG laser crystals. Gain and lifetime of laser crystals significantly influence the regime of Q-switched generation.

Neutron- and photon-activation detection limits in breast milk analysis for prospective dose evaluation of the suckling infant.

Complex situations related to the environment, as in the regions affected by the Chernobyl accident and regions in which nuclear weapons testing were undertaken, as in Semipalatinsk, could be reflected in the trace element content in mothers' milk. The evaluation of fractional transfer to milk of ingested or inhaled activity and of the corresponding dose coefficients for the infant, following a mothers' radioactive intake, can take advantage from wide-ranging studies of elemental and radionuclide contents in mothers' milk. In this work the possibility to determine elements, such as Ru, Zr, Nb, Te, Ce, Th, U, in milk powder has been investigated.

[Calculated and measured blood propofol concentrations during target-control infusion by means of a Diprifusor system during operations under extracorporeal circulation].

The study was undertaken to compare measured versus calculated propofol concentrations (C(m) and C(c), respectively), by using Diprifusor technology in cardiac surgery with cardiopulmonary bypass (CPB). The study included 10 NYHA II-III patients (aged 27-45 years) undergoing mitral valve replacement. Propofol (Diprivan PFS 50 ml, AstraZeneca) was target-control infused (TCI) by the Diprifusor system (Graseby 3500).

[Current ways of preventing postresectional bronchial fistulas in pulmonary tuberculosis].

The paper presents the data of a follow-up of 51 patients in whom a bronchial stump suture was additionally fixed at surgery by applying Tochocomb plates (in 30 patients) or an autoangiograft from the removed lung (in 21 patients) in order to prevent a bronchial fistula. The preliminary findings were positively appraised. The authors recommend that this procedure be used in phthisiosurgery and surgical pulmonology.

[Maintenance of the hypnotic component of general anesthesia with feed-back regulation].

The purpose of the study was to design and investigate the closed-loop propofol system (CLPS) with a mean arterial pressure (MAP) controller in open-heart surgery. CLPS consists of a 386 PC, a blood pressure sensor and an infusion pump. The C language computer program sets the propofol infusion rate based on an empirical algorithm including proportional component to maintain the measured MAP more closely to the target MAP (85% of patient standard MAP).