A mechanical ink writing recorder suitable for recording uterine motility during pregnancy and labor

Vi:.

I.

tlinplacements, hence the use of a light lever system having au itr~l)l.ific~:rtion of fo~w to enc. Displacements associated with minor inkautcrine tension changes and ilitplawnwnts localized in n;tture and not necessarily associate11 with intraut,erine tcwivu can he readily recorded. the t,ot.al neight resting upon thtb The lever system is const,ructetl of aluminum; An increment of $L2 Gm. is sufficient. to overcome the lxxarabdominal wall is 15 Gm. Thcowtically, with proper materials and workiny and writing point resistance. manship, the total weight upon the abdomen and the fort% necessary to overcome *Receive~l

for

publication.

April

11. 1940. .7.1(’

BENSINCI

:

MECHANICAL

WRITING

RECORDER

7min

FOR

TJTERINF.

MOTILITY

331

47eec.

Fig.

?A.

Fig.

23.

7mh.

47sec.

Fig.

3.

Fig.

4.

c