A textbook of obstetrics . so of the transverse,by the methods of Lohlein and of Skutsch. The Narrow, Funnel=shaped Pelvis; Fetal or Undeveloped Pelvis.— This variety of pelvis is contracted transversely at the pelvicoutlet, or both in the transverse and anteroposterior diameters,without abnormalities in the spinal column. The depth of thepelvic canal is much increased by the length of the sacrum, of thesymphysis, and of the lateral pelvic walls. The sacrum is narrow,has little perpendicular curve, and is placed far back between theilia (Fig. 288). Schauta ascribes this form of contraction to
A textbook of obstetrics . so of the transverse,by the methods of Lohlein and of Skutsch. The Narrow, Funnel=shaped Pelvis; Fetal or Undeveloped Pelvis.— This variety of pelvis is contracted transversely at the pelvicoutlet, or both in the transverse and anteroposterior diameters,without abnormalities in the spinal column. The depth of thepelvic canal is much increased by the length of the sacrum, of thesymphysis, and of the lateral pelvic walls. The sacrum is narrow,has little perpendicular curve, and is placed far back between theilia (Fig. 288). Schauta ascribes this form of contraction to ananomaly of development by which the pelvic walls are length-ened downward and the weight of the body is thrown backwardupon the sacrum. It is said to be very rare, but it has beenfound quite frequently in those hospitals where the outlet of thepelvis is regularly measured. It comprises from five to nine percent, of all contracted pelves, according to Hreisky, and Fleisch- ANOMALIES IX THE FORCES /? LABOR. 433. mann found twenty-four examples in 2700 parturient slight manifestation of the deformity is often called a mascu-line pelvis, by reason of the diminution in the breadth of thepubic arch. This degreeof the funnel-shaped pelvisis frequently encountered(Fig. 289). Diagnosis.— I he diag-nosis of a narrow, funnel-shaped pelvis is made by acomparison of the measure-ments of the pelvic inletwith those of the former are found to benormal or even greater thannormal, while the measure-ments of the outlet are di- Fig- 288.—Narrow, funnel-shaped pel-minkhed Tf nq i<? thr rule vis : C V I0^ cm; tr* (inlet) 8^ Cm; minisned. it, as is tne rule tr (outlet) 1yz cm- in extreme degrees of this (specimen in the authors collection). deformity, the inlet and cavity are contracted, the outlet is still smaller in proportion. Acareful palpation of the pelvic canal is an important aid to acorrect diagnosis. The pelvic walls are felt to converge as theya
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Keywords: ., bookcentury1800, bookdecade1890, bookidtex, booksubjectobstetrics
