What should be the normal effect on the height of the fluid

Assignment Help Physics

Reference no: EM131127388

The human brain and spinal cord are immersed in the cerebrospinal fluid. The fluid is normally continuous between the cranial and spinal cavities and exerts a pressure of 100 to 200 mm of H2O above the prevailing atmospheric pressure. In medical work, pressures are often measured in units of mm of H2O because body fluids, including the cerebrospinal fluid, typically have nearly the same density as water. The pressure of the cerebrospinal fluid can be measured by means of a spinal tap. A hollow tube is inserted into the spinal column, and the height to which the fluid rises is observed, as shown in Figure P9.75. If the fluid rises to a height of 160 mm, we write its gauge pressure as 160 mm H2O.

(a) Express this pressure in pascals, in atmospheres, and in millimeters of mercury.

(b) Sometimes it is necessary to determine whether an accident victim has suffered a crushed vertebra that is blocking the flow of cerebrospinal fluid in the spinal column. In other cases, a physician may suspect that a tumor or other growth is blocking the spinal column and inhibiting the flow of cerebrospinal fluid. Such conditions can be investigated by means of the Queckensted test. In this procedure, the veins in the patient's neck are compressed, to make the blood pressure rise in the brain. The increase in pressure in the blood vessels is transmitted to the cerebrospinal fluid. What should be the normal effect on the height of the fluid in the spinal tap?

Reference no: EM131127388

Questions Cloud

Testing requires the design of control systems : For the system described in Problem P10.13, the goal is to achieve a phase margin of 50° with the additional requirement that the time to settle (to within 2% of the final value) be less than 4 seconds. Design a lead network to meet the specifica..

Determine the amount of supplies purchased during the year : The supplies and supplies expense accounts at December 31, after adjusting entries have been posted at the end of the first year of operations, are shown in the following T accounts:

Develop schedule for hiring new employees : With the company expanding into several new markets in the coming months, Cable & Moore was anticipating a large increase in sales revenue. The future looked bright for this provider of television, telephone, and Internet services. Develop a schedule..

Identifying how you feel about the issue discussed and why : Write your critical paragraph, identifying how you feel about the issue discussed and why. To avoid total subjectivity, try imagining that you like the other point of view and yet explain why it is incorrect.

What should be the normal effect on the height of the fluid : Express this pressure in pascals, in atmospheres, and in millimeters of mercury.

A robot with an extended arm has a heavy load : A robot with an extended arm has a heavy load, whose effect is a disturbance, as shown in Figure P10.15 [22]. Let R(s) = 0 and design Gc(s) so that the effect of the disturbance is less than 20% of the open loop system effect.

How the gender schema theory would explain : Using the model of self-socialization proposed by gender schema theory, Give a specific example of one such choice, and explain how the gender schema theory would explain that choice

What is power distribution of your group between leadership : What is the power distribution of your group between leadership and group members and how does that impact addressing points of conflict? Does your group demonstrate weak or strong uncertainty avoidance when conflict arises?

Select a proportional plus integral : A driver and car may be represented by the simplified model shown in Figure P10.16 [17].The goal is to have the speed adjust to a step input with less than 10% overshoot and a settling time (with a 2% criterion) of 1 second. Select a proportional ..

User Account

All Pages