Hysteroscopy in 2001: a comprehensive review

Distending Media Used During Hysteroscopy: Perioperative Nursing Implications

Hysteroscopy is a gynecological procedure that may be indicated for abnormal uterine bleeding, diagnosis and management of infertility, contraception, or sterilization. Surgeons use distending media during hysteroscopy to view the uterine cavity. Media options include carbon dioxide gas and both electrolytic and nonelectrolytic fluids. All distending media is absorbed by the patient's body, but the manner in which each media is absorbed is unique to its chemical composition. Understanding the properties of each distending medium and the risks involved with its use is critical to safe perioperative nursing care for patients undergoing hysteroscopy. This article provides perioperative nurses with a review of uterine anatomy and evidence-based information on the types of distending media used during hysteroscopy and the corresponding perioperative nursing implications.

Hysteroscopy: a technique for all? Analysis of 5,000 outpatient hysteroscopies

OBJECTIVE

1) To investigate the relationship between operator experience and the success of outpatient hysteroscopy; and 2) to determine if the introduction of normal saline and the use of narrow-caliber hysteroscopes and vaginoscopic approach are associated with a lower failure rate.

DESIGN

Retrospective study.

SETTING

Teaching-hospital based outpatient hysteroscopy clinic.

PATIENT(S)

Five thousand consecutive women undergoing outpatient hysteroscopy between October 1988 and June 2003.

INTERVENTION(S)

The hysteroscopies were carried out both by experienced operators and by trainees. Procedures were performed using 4-mm and 2.9-mm telescopes with 5-mm and 3.5-mm diagnostic sheaths, respectively. Between October 1988 and 1996, the uterine cavity was distended with CO(2) (CO(2) period), whereas normal saline was preferred after 1997 (1997-2003: saline period). Traditional technique of hysteroscope insertion and vaginoscopic approach were used depending on operator preference and experience and patient characteristics.

MAIN OUTCOME MEASURE(S)

Success, failure, and complication rates.

RESULT(S)

The hysteroscopies were successfully performed in nearly 95% of cases by 362 operators (mean 13.8 hysteroscopies per operator) with different levels of expertise. Failure and complication rates were 5.2% and 5.4%, respectively, without any significant difference between CO(2) and saline periods. Vasovagal attacks and shoulder pain were significantly higher during the CO(2) period. The success of outpatient hysteroscopy was negatively affected by postmenopausal status, nulliparity, need for cervical dilatation or local anaesthesia, traditional technique of hysteroscope insertion, and use of a 5-mm hysteroscope.

CONCLUSION(S)

A high level of expertise is not a prerequisite to performing hysteroscopy on an outpatient basis. Recent advances in technique and instrumentation facilitate this approach and might encourage greater adoption by the wider gynecology community.

Development of a thinner and more flexible type of minihysteroscope with a controlled 90-degree bendable tip for vision-guided endometrium biopsy

STUDY OBJECTIVE

Evaluation of the uterine cavity is limited with rigid 5-mm hysteroscopes because of the need for cervical dilatation, reduced movements inside the uterus, and no option for vision-guided biopsy. In cooperation with PolyDiagnost GmbH, Pfaffenhofen, Germany, a new type of flexible minihysteroscope with bendable tip was developed and evaluated.

DESIGN

Prospective and parallel observational interindividual evaluation of flexible minihysteroscope and standard hysteroscope for diagnostic hysteroscopy (Canadian Task Force classification II-3).

SETTING

Obstetrics and gynecology department of a university clinic.

PATIENTS

Nine women, average age 65.0 years (range 46-89 years), with indications for diagnostic hysteroscopy.

INTERVENTIONS

After defining requirements, a novel, thinner, and more flexible minihysteroscope, 18-cm long with a 2.67-mm outer diameter, was developed with straight zero-degree scope, 70-degree vision field, and 6000-pixel resolution. Two working channels, 1.2 mm and 0.55 mm, allow suction-irrigation and introduction of a 1.0-mm biopsy forceps or cytology brush. The tip of the instrument is 90-degree stageless bendable to both sides. Diagnostic hysteroscopy was performed with flexible minihysteroscope followed by standard rigid hysteroscopy to verify results.

MEASUREMENTS AND MAIN RESULTS

From July 2003 through March 2004, both procedures were performed in nine patients with identical visual and histologic results. No complications occurred. No cervix-dilating instruments were necessary for introduction of the flexible minihysteroscope. Visualization of the entire uterine cavity is improved with the flexible scope because a bendable tip allows better peripheral vision (e.g., of the openings of the tubes). However, movement of the tip should be performed carefully due to potential risk of uterine perforation.

CONCLUSION

This new flexible minihysteroscope is less invasive compared with standard rigid hysteroscopy, which supports performance of ambulatory hysteroscopy and makes increased movements and vision-guided biopsy inside the uterine cavity possible.

Does Hysteroscopy Produce Intraperitoneal Spread of Endometrial Cancer Cells?

Hysteroscopy is the tool of choice for the evaluation of the endometrial cavity, including the assessment of abnormal uterine bleeding (AUB). The combination of endometrial biopsy and diagnostic hysteroscopy could replace dilation and curettage in most patients. However, hysteroscopy might disseminate endometrial cells into the peritoneum, thereby potentially raising the stage and decreasing the survival of a patient with endometrial cancer. The purpose of this article is to explore the dilemma of whether hysteroscopy produces intraperitoneal spread of endometrial cancer cells, and, if the answer is yes, what is the prognostic significance of isolated malignant cells in the peritoneal cavity. We conducted a literature search using MEDLINE using the following key words: hysteroscopy, endometrial carcinoma, and dissemination for the years 1980 through 2001. Retrospective data shows a correlation between fluid-based hysteroscopy and the presence of cancer cells in the peritoneal cavity. It cannot, however, be determined whether positive peritoneal washings are the result of hysteroscopy or whether the endometrial cells are found in the peritoneum as a result of other mechanism. Because no prospective, randomized studies have been performed on the dissemination of cancer cells by diagnostic hysteroscopy, no definite conclusions can be made concerning the risk of diagnostic hysteroscopy. In addition, the prognostic significance of isolated malignant cells in the peritoneal cavity of women with endometrial cancer is unclear. Although there might be an increased risk of peritoneal contamination by cancer cells after hysteroscopy, there is currently no evidence that these patients face worse prognosis than patients who have undergone other diagnostic procedures.

Use of carbon dioxide versus normal saline for diagnostic hysteroscopy

OBJECTIVE

To compare CO2 and normal saline as distention medium in diagnostic hysteroscopy.

DESIGN

Prospective randomized study.

SETTING

University-based artificial insemination and sterility center in Italy.

PATIENT(S)

Seventy-four women who underwent hysteroscopy.

INTERVENTION(S)

Hysteroscopy was performed with CO2 or normal saline.

MAIN OUTCOME MEASURE(S)

Quality of intrauterine images, cervical dilatation, local anesthesia, and duration of the test. In addition, each patient evaluated pain during and after the examination, irritation of the phrenic plexus, analgesic use, and side effects.

RESULT(S)

The quality of the hysteroscopic image was statistically similar for both media. Dilatation of the cervical canal and use of local anesthesia was more often necessary in the CO2 group. The procedure time was 5.96 +/- 1.55 minutes in the CO2 group and 3.12 +/- 0.96 in the normal saline group. The CO2 group reported pain more frequently during and after the examination, shoulder pain, greater analgesic use, and more side effects.

CONCLUSION(S)

For hysteroscopy, normal saline is technically equal to CO2 in terms of image quality and ease of use but offers more advantages. Hysteroscopy with normal saline is more acceptable to patients, quicker to perform, and entails fewer additional procedures.