Thanks, Doc. Our total revenue for the fourth quarter of 2011 increased to $76.5 million compared to $75.6 million in the same period last year. Net income for the fourth quarter of 2011 was $17.8 million or $1.26 per diluted share as compared to net income of $10 million or $0.72 per diluted share for the fourth quarter of 2010.
Our fourth quarter of 2011 net income included a net $12.6 million pretax gain, which included $1.6 million of SG&A expenses associated with the sale of assets related to Orbit. Excluding this gain and the related income tax expense, net income for the fourth quarter of 2011 was $9.8 million or $0.70 per diluted share.
For the fiscal year ended December 31, 2011, our total revenue increased 6.2% to $302.2 million compared to $284.6 million in the same period last year. Net income for the fiscal year ended December 31, 2011, was $44.7 million or $3.15 per diluted share compared to net income of $30.9 million or $2.23 per diluted share for the same period last year.
Excluding the gain on sale of Orbit, the $1.6 million of SG&A expenses and the related income tax expense, our net income for the fiscal year ended December 31, 2011, was $36.7 million or $2.59 per diluted share.
Now let me discuss our fourth quarter revenue performance by market segment. You can also view our detailed market segmentation and year-to-date top line performance in our earnings press release.
For the fourth quarter of 2011, sales from our infusion therapy market increased 3.2% to $52.5 million and comprised 69% of our total sales. The market growth was attributable to strong performance of CLAVE and MicroCLAVE needlefree connectors, which increased 13.7% to $29.1 million compared to $25.6 million a year ago, representing 38% of our total revenue. This growth was partially offset by a decrease in Custom Sets. The fourth quarter 2010 sales from Custom Sets included a one-time $2.7 million shipment to Hospira. Excluding this one-time shipment, sales from Custom Sets increased $1.6 million year-over-year.
We believe CLAVE needlefree connectors and Custom Sets will remain key growth drivers in our infusion therapy market. We expect sales in infusion therapy to increase approximately 6% to 9% in fiscal year 2012 from fiscal year 2011.
Sales from the critical care market represented 18.6% of our total sales and were down 4.9% to $14.2 million as a result of competitive volume and price pressures. We continue to invest in research and development as well as sales and marketing of this business. And we believe we have the right strategy to make this a growth market for us in the future.
We expect critical care sales to decrease year-over-year by approximately 4% to 8%. Our oncology market was down 13.4% to $5.3 million, which represented 7% of our total sales for the fourth quarter. The decrease was due to product sell-through catching up with sell-in. Demand, backlog and conversions for oncology products remain very robust going into 2012. We expect oncology sales to increase by approximately 35% to 40% year-over-year.
Our other product category, which includes products in the renal and diabetes markets, grew 21.7% year-over-year to $4.4 million, representing 5.7% of our fourth quarter 2011 revenue. Strong performance of this market was primarily driven by TEGO in the renal market, which increased 49.6% year-over-year to $2.1 million. We expect sales in this product category to increase approximately 3% to 6% this year.
Our fourth quarter sales by distribution channel were as follows: Domestic sales to Hospira were down 0.9% year-over-year to $31.1 million, as strong performance of the CLAVE product line and Standard Oncology was offset by significant decreases in Custom Sets, primarily due to the one-time shipments of Custom last year. For the fourth quarter of 2011, domestic sales to Hospira represented
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for 2012 domestic sales to Hospira represented 40.6% of our total revenue compared to 41.5% for the same quarter of 2010.
Our non-Hospira domestic sales increased 5.2% to $29 million year-over-year and were driven by strong contributions from infusion therapy. Our domestic sales, including Hospira, were up 2% to $60.3 million or 78.8% of our total revenue. And international sales decreased 1.9% to $16.2 million year-over-year, representing 21.2% of our total revenue.
Our fourth quarter gross margin was 47% compared to 49.6% a year ago and 46.5% in the previous quarter. The year-over-year decrease in gross margin was attributable to higher raw material cost, continued cost pressure from our new factory in Slovakia and price reductions in critical care. We expect our gross margins to be in the range of 47% to 47.5% for the full fiscal year of 2012.
SG&A expenses increased by 15.6% to $22.3 million year-over-year due to $1.6 million related to the sale of the Orbit product lines and our continued investment in sales and marketing initiatives. As a percentage of sales, our SG&A expenses were 29.1%. Excluding the $1.6 million related to the sale of the Orbit product line, SG&A was 27% compared to 25.5% for the fourth quarter a year ago. We expect SG&A as a percentage of total revenue to be 26.5% to 27% for the full fiscal year of 2012.
Our research and development expenses increased 24.5% to $2.2 million compared to $1.7 million for the fourth quarter of 2010. This increase was in line with our expectations as we continue to invest in our existing and new products and to establish more presence for our new product offerings in the markets we serve. We expect our research and development expenses to be approximately 3% for the full fiscal year of 2012.
Our tax rate for the fourth quarter was 31.3%. Excluding the gain on sale of assets discussed earlier, our operating income for the fourth quarter of 2011 totaled $13.1 million or 17.2% of sales compared to operating income of $16.5 million or 21.8% of sales a year ago.
Our EBITDA, or earnings before interest, depreciation and amortization, totaled $30.6 million compared to $21.1 million for the fourth quarter a year ago.
Now moving to our balance sheet and cash flow. As of December 31, 2011, our balance sheet remained strong with no debt and $160 million in cash, cash equivalents and investment securities. This equates to approximately $11.53 per outstanding share. We also had $233.7 million in working capital. It's also worth noting that at the end of the fourth quarter, our inventory levels decreased to $40.4 million compared to $44.1 million as of December 31, 2010. Additionally, we generated a record $64.5 million in cash flow from operating activities during the fiscal year.
Our capital expenditures totaled $15.8 million during the year and primarily included machinery, equipment and molds for our plants in the U.S. and Slovakia and investments in IT.
Day sales outstanding for the fourth quarter were 58 days. We expect DSOs to be approximately 60 to 65 days in the foreseeable future, which is in line with historical DSOs.
Now let me discuss our revenue and EPS guidance for fiscal year 2012 and first quarter of 2012. For the full fiscal year of 2012, we expect to generate revenue in the range of $318 million to $330 million. On a market segment basis, we expect our infusion therapy sales to increase year-over-year approximately 6% to 9%. We expect critical care to be down approximately 4% to 8% and we expect our oncology market to be up 35% to 45%. We expect our other category will be up 3% to 6%.
We also expect our diluted earnings for the full fiscal year of 2012 to be in the range of $2.45 to $2.70 per share. For modeling purposes, our tax rate is expected to be 35% for 2012. For the first quarter of 2012, we expect our revenue to be in the range of $73 million to $76 million and we expect a steady sequential progression of revenue growth during the second, third and fourth quarters. Gross margin will be approximately 47% during the first quarter and we expect our gross margin to increase to approximately 48% sometime in the second half of this year. We expect our earnings per share to be in the range of $0.42 to $0.52, which includes a tax rate of 35% and expect our earnings per share to increase throughout the year.
Overall, the Slovakia plant will continue to put pressure on our gross margins throughout the entire year. However, we expect this impact to somewhat decrease during the second half of the year as we increase production volume. We expect our first quarter SG&A to be sequentially higher than in the fourth quarter due to increased sales and promotional costs including the hiring of 5 additional sales people. As we continue to invest in new products, our research and development expenses will also be higher in the first quarter.
Our operating cash flow is expected to be approximately $40 million to $50 million in 2012. We believe capital expenditures will be in the range of $13 million to $18 million in 2012. We also expect to continue to use our strong balance sheet and cash flow to repurchase stock on an opportunistic basis and look for acquisition opportunities to expand our leading position in infusion therapy, oncology and the critical care markets.
Now let me turn the call back to Dr. Lopez, to provide an update on new products and our business trends.