Analyse elliptischer Druck/Flu�- und Druck/Volumen-Diagramme der Atemwege: Die kompressiv wirksame obstruktive Ventilations-St�rung

Hüttemann, U.; Huckauf, H.

doi:10.1007/bf01495983

Cited by 5 publications

(3 citation statements)

References 13 publications

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“…Ws is impedance o f work, evaluated by integration of area of pressure/volume diagram. Detailed mathematical proceedings have been described by H uttemann and H uckauf [4].…”

Section: Methodsmentioning

confidence: 99%

“…In patients with pneumothorax, cystic lung diseases and emphysematous bullae we saw a high quotient o f FRCa/He (average value 2.08) with maximal enlarged intrathoracic gas volume and ellipse in pressure/flow traces. H uettemann and H uckauf [4] could demonstrate that this elliptic diagram reveals a complex information. By analyzing the corresponding pressure/ volume traces in an electrical curcuit, which consists o f a resistor and a capacitor, the authors showed that work was required not only to flow resistance but also to non-ventilated gas spaces for being compressed and expanded.…”

Section: In 1915 Rohrer [5] Demonstrated In a Theoretical Framework mentioning

confidence: 99%

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Significance of Loop Formation in Pressure/Flow Diagrams of Chronic Obstructive Lung Diseases

Huckauf¹,

Hüttemann²

1972

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This paper tries to examine pathophysiologic factors causing loop formations in pressure/flow diagrams recorded by a body plethysmograph. An account is given of pressure/flow traces in a survey of 564 patients suffering from chronic obstructive lung diseases. 34 % of the patients have shown a looped appearance in the traces. It can be demonstrated that the compressibility of gas not taking part in ventilation will cause phase shift in pressure/flow diagrams in cases of some defined factors like increased breathing rate, enlarged intrathoracic gas volume, increased airway resistance and high absolute pressure at resting mid-position in non-ventilated gas spaces. In case of elliptic loop formation in pressure/flow patterns, work (blind work) caused by compression and decompression of non-ventilated gas volumes can be determined from corresponding pressure/volume diagrams. The conclusion emphasizes that blind work can dramatically influence dynamics of breathing in advanced chronic obstructive lung diseases.

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“…Ws is impedance o f work, evaluated by integration of area of pressure/volume diagram. Detailed mathematical proceedings have been described by H uttemann and H uckauf [4].…”

Section: Methodsmentioning

confidence: 99%

Section: In 1915 Rohrer [5] Demonstrated In a Theoretical Framework mentioning

confidence: 99%

Significance of Loop Formation in Pressure/Flow Diagrams of Chronic Obstructive Lung Diseases

Huckauf¹,

Hüttemann²

1972

Respiration

Self Cite

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“…Airway resist ance (Rav.) was elicited with the constant volume body plethysmograph (Bodytest; Jaeger, Wurzburg, FRG) in elimination of well-known sources of error [13,15].…”

Section: Testing Proceduresmentioning

confidence: 99%

Efficacy of Reproterol Assessed by the Acetylcholine Provocation Test

Lode¹,

Huettemann²,

Huckauf³

et al. 1979

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The acute broncholytic efficacy and the protective anticonstrictive effectiveness of a new β₂-receptor stimulator, Reproterol, was tested in 16 patients with the acetylcholine (ACH) provocation test. Plethysmographic airway resistance determinations (R_aw) and flow volume curves (VE_max50%/FVC) were used as assessment parameters. All patients proved susceptible to ACH provocation, in as much they demonstrated a significant rise in the R_aw from 2.46 to 11.53 cm H₂O / 1 sec and a significant decline of the VE_max50%/FVC from 884 to 565 (ml/sec/1) following ACH administration. With Reproterol inhalation (2 puffs at 500 µ each), almost complete elimination of ACH-induced bronchial constriction was achieved. The ACH provocation with the same patients the following day, however, was almost absent 60 min after oral ingestion of 20 mg of Reproterol tablets. Dose-efficacy studies in 7 volunteers from the same group revealed a subjectively better tolerance of the 10-mg tablets, but with a correspondingly lower antibronchia constrictive efficacy.

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Leistungsbegrenzung durch Störungen der Atemmechanik

Beil

1976

Leistungsbegrenzung Von Seiten Der Lunge

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Analyse elliptischer Druck/Flu�- und Druck/Volumen-Diagramme der Atemwege: Die kompressiv wirksame obstruktive Ventilations-St�rung

Cited by 5 publications

References 13 publications

Significance of Loop Formation in Pressure/Flow Diagrams of Chronic Obstructive Lung Diseases

Significance of Loop Formation in Pressure/Flow Diagrams of Chronic Obstructive Lung Diseases

Efficacy of Reproterol Assessed by the Acetylcholine Provocation Test

Leistungsbegrenzung durch Störungen der Atemmechanik

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