Hypoxia-Inducible Factor - HZV

hypoxia-inducible factor

SEE: under factor.

hypoxia inhalation test

An assessment of a person’s ability to tolerate air travel (in which the oxygen concentration in the cabin at cruising altitude is reduced relative to that at sealevel).

 PATIENT CARE: The prospective flier is exposed to an ambient oxygen saturation of 15% (normal = 21%) for a minimum of 15 min while undergoing electrocardiographic monitoring and continuous pulse oximetry. The test is imperfect but can provide some information about the supplemental oxygen needs of special patients, such as those with chronic obstructive lung disease, during commercial air travel.

hypoxic challenge test

Exposure to an oxygen-depleted atmosphere (15% oxygen in nitrogen) prior to air travel. The test is used to determine whether a person with respiratory disease will be able to tolerate the reduced oxygen environment of airplanes.

hypsarrhythmia

(hĭp″săr-ĭth′mē-ă) [Gr. hypsi, high, + a-, not, + rhythmos, rhythm] An abnormal electroencephalographic pattern of persistent generalized slow waves and very high voltage. Clinically it is often associated with infantile spasm and progressive mental deterioration.

hyssop

(his′ŏp) [L. hyssopus fr Gr. hyssōpos] An herb (Hyssopus officinalis) native to southern Europe, the Middle East, and the area around the Caspian Sea. It is used as an aromatic herb and as an antiseptic, cough reliever, and expectorant.

Hyssopus officinalis

SEE: hyssop.

hysterectomy

(his″tĕ-rek′tŏ-mē) [hystero- + -ectomy] Surgical removal of the uterus. Each year in the U.S., about 600,000 women undergo hysterectomies. Indications for the surgery include benign or malignant changes in the uterine wall or cavity and cervical abnormalities (including endometrial cancer, cervical cancer, severe dysfunctional bleeding, large or bleeding fibroid tumors (leiomyomas), prolapse of the uterus, intractable postpartum hemorrhage due to placenta accreta or uterine rupture, or severe endometriosis). The approach to excision may be either abdominal or vaginal. The abdominal approach is used most commonly to remove large tumors; when the ovaries and fallopian tubes also will be removed; and when there is need to examine adjacent pelvic structures, such as the regional lymph nodes. Vaginal hysterectomy is appropriate when uterine size is less than that in 12 week gestation; when no other abdominal pathology is suspected; and when surgical plans include cystocele, enterocele, or rectocele repair. SEE: illus. SEE: Nursing Diagnoses Appendix.

HYSTERECTOMY

 In preparation for abdominal hysterectomy, the patient is placed in the dorsal position. The table is ready to be tipped into the Trendelenburg position. As soon as the incision is made through the peritoneum, the table should be put into the Trendelenburg ...