СКОЛЬКО РЕВИЗИОННЫХ ЭНДОПРОТЕЗИРОВАНИЙ ВЫПОЛНЯТЬ ДО ТОГО, КАК ПРИНЯТЬ РЕШЕНИЕ ОБ АРТРОДЕЗЕ? (КЛИНИЧЕСКОЕ НАБЛЮДЕНИЕ ПАЦИЕНТКИ С РЕВМАТОИДНЫМ АРТРИТОМ КОЛЕННЫХ СУСТАВОВ)

The authors present a clinical case of a female patient with seropositive rheumatoid polyarthritis mainly affecting the knee joints. The patient underwent a primary total bilateral knee replacement. Surgical site infection required multiple revisions including replacement of extensive bone defects of AORI type 3 by structural femur and tibia allografts as well as allografting of extensor mechanism. Repeated attempts to eliminate infection, to gain support ability of extremities and joints motion were not successful. Long-term staged surgical treatment resulted in removal of prostheses and bilateral knee arthrodesis to restore support function of the extremities.В статье представлен опыт хирургического лечения пациентки, страдающей серопозитивной полисуставной формой ревматоидного артрита с преимущественным поражением коленных суставов. Пациентке было выполнено первичное тотальное эндопротезирование обоих коленных суставов. Развившаяся хирургическая инфекция в области оперативных вмешательств потребовала многократных ревизионных операций, в том числе с замещением обширных костных дефектов 3 типа по AORI структурными аллотрансплантатами бедренной и большеберцовой костей и аллопластикой разгибательного аппарата коленного сустава. Повтор-ные попытки купировать инфекционный процесс, сформировать опороспособные конечности и подвижные коленные суставы не увенчались успехом. Многолетнее многоэтапное хирургическое лечение завершилось удалением эндопротезов и артродезированием обоих коленных суставов для восстановления опорной функции конечностей

Study of the radiative decay ϕ→ηγ\phi \to \eta \gamma with CMD-2 detector

Using the $1.9 pb^{-1}$ of data collected with the CMD-2 detector at VEPP-2M the decay mode $\phi \to \eta \gamma$, $\eta \to \pi^+\pi^-\pi^0$ has been studied. The obtained branching ratio is B($\phi \to \eta \gamma) = (1.18 \pm 0.03 \pm 0.06)$.Comment: 13 pages, 5 figures, LaTex2e, to be published in Phys. Lett.

Study of the process e+e- to pi+pi-pi+pi-pi0 with CMD-2 detector

The process e+e- to pi+ pi- pi+ pi- pi0 has been studied in the center of mass energy range 1280 -- 1380 MeV using 3.0 1/pb of data collected with the CMD-2 detector in Novosibirsk. Analysis shows that the cross section of the five pion production is dominated by the contributions of the eta pi+pi- and omega pi+pi- intermediate states.Comment: 8 pages, 3 figure. Submitted to Phys. Lett.

Study of the Process e+e−→KL0KS0e^+e^- \to K^0_L K^0_S in the C.M.Energy Range 1.05-1.38 GeV with CMD-2

The process $e^+e^- \to K^0_L K^0_S$ has been studied with the CMD-2 detector using about 950 events detected in the center-of-mass energy range from 1.05 to 1.38 GeV. The cross section exceeds the expectation based on the contributions of the rho(770), omega(782) and phi(1020) mesons only.Comment: 12 pages, 3 figures, uses elsart.cls, submitted to Physics Letters

Observation of the conversion decay ϕ→π0e+e−\phi\to\pi^0e^+e^- at CMD-2

Using 15.1^{-1} of data collected by CMD-2 in the $\phi$-meson energy range, the branching ratio of the conversion decay $\phi\to\pi^0e^+e^-$ has been measured for the first time: B(\phi\to\pi^0e^+e^-) = (1.22 \pm 0.34 \pm 0.21) \cdot 10 ^{-5}.Comment: 13 pages, 6 PostScript figures, uses refmerge.sty. To be published in Phys. Lett.

LATE PLEISTOCENE-HOLOCENE ENVIRONMENTAL AND CLIMATIC CHANGES IN THE BAIKAL REGION INFERRED FROM MULTI-PROXY LACUSTRINE RECORDS

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First observation of the ϕ→π+π−γ\phi\to\pi^+\pi^-\gamma decay

Radiative decays of the $\phi$ meson have been studied using a data sample of about 20 million $\phi$ decays collected by the CMD-2 detector at VEPP-2M collider in Novosibirsk. From selected $e^+e^-\to\pi^{+}\pi^{-}\gamma$ events the $\phi\to\pi^{+}\pi^{-}\gamma$ decay has been observed for the first time. \par Under the assumption that the intermediate $f_{0}(980)\gamma$ state dominates in the $\phi \to \pi^+\pi^-\gamma$ decay, the corresponding branching ratio is $Br(\phi\to f_{0}(980)\gamma)=(1.93\pm 0.46\pm 0.50)\times10^{-4}$. \par Selected $e^+e^-\to\mu^+\mu^-\gamma$ events were used to obtain $Br(\phi\to\mu^+\mu^-\gamma) =(1.43\pm 0.45\pm 0.14)\times10^{-5}$ for $E_{\gamma}>20$ MeV. \par Using the same data sample, upper limits at 90% CL have been obtained for the C-violating decay of the $\phi$: $Br(\phi\to\rho\gamma) < 1.2\times10^{-5}$; and for the P- and CP-violating decay of the $\eta$: \par $Br(\eta\to\pi^+\pi^-) < 3.3\times10^{-4}$.Comment: 16 pages, 10 figures, Submitted to Phys. Lett.

Study of the ϕ\phi decays into π0π0γ\pi^0\pi^0\gamma and ηπ0γ\eta\pi^0\gamma final states

Radiative decays of the $\phi$ meson have been studied using a data sample of about 19 million $\phi$ decays collected by the CMD-2 detector at VEPP-2M collider in Novosibirsk. From selected $e^+e^-\to\pi^{0}\pi^{0}\gamma$ and $e^+e^-\to\eta\pi^{0}\gamma$ events the following model independent results have been obtained: \par $Br(\phi\to\pi^{0}\pi^{0}\gamma) = (0.92\pm 0.08\pm0.06)\times10^{-4}$ for $M_{\pi^{0}\pi^{0}}>700$ MeV, \par $Br(\phi\to\eta\pi^{0}\gamma) = (0.90\pm 0.24\pm 0.10)\times10^{-4}$. It is shown that the intermediate mechanism $f_{0}(980)\gamma$ dominates in the $\phi\to\pi^{0}\pi^{0}\gamma$ decay and the corresponding branching ratio is \par $Br(\phi\to f_{0}(980)\gamma)=(2.90\pm 0.21\pm1.54)\times10^{-4}$. The systematic error is dominated by the possible model uncertainty. \par Using the same data sample the upper limit has been obtained for the P- and CP-violating decay of $\eta$ at 90% CL: \par $Br(\eta\to\pi^{0}\pi^{0}) < 4.3\times10^{-4}$ >.Comment: 13 pages, 6 figures, Submitted to Phys. Lett.